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I'm an electronic technologist with more than 30 years of experience dealing with advanced electronic and computer systems. I worked in calibration labs, Air Traffic and navigation, communications and radars. I built, installed and service them for years. Electronic is what I do.
Since the last 15 years my main hobby had been audio stuffs starting with the simple and the affordable and now dealing more with the exclusive and the sophisticated side of the equation. I built some of my best sound system components from circuits, then PCB and up to enclosure design, solid state or tubes. I also collected very nice gears over the years from major players in the audio league such as Mark Levinson, Air Tight, Ayre, Audio Research, Yamamoto, Vacuum State, Borbely, name it. I think that now I know what a good sound is, at least according to my own tastes.
I built stuff mainly for me or my friends, but sometime I organize or participate in Group Buy. Over the years I built a little circle of contacts that help me in my endeavors, to find difficult to source parts, discuss circuits, etc.
This site is dedicated to my passion. Read on...
Air Tight ATC-2 Preamp, Statement tube preamp. This particular unit is fully modified and comes with the optional premier ALPS HQPRO volume control. The preamp has several additional important upgrades, done by Roger Sheker of Audience in California. The one 12AX7 tube is replaced by a third 12AU7 tube, in order make the output impedance more manageable, and the 6X4 rectifier tube replaced by a 6CA4, for reliability and uniformity. Also, the original hardwired power cord has been replaced by an IEC socket so that any power cord can be used. Finally the jacks on the back were replaced with Cardas jacks and the interior wiring with Audience wire. I'm planning to install my own DIY LC-Audio Light phono preamp with external supply to get a phono inside. See some nice pictures on www.diyaudio.com.
Vacuum State RTP3D Preamp, I loved the SVP-2 so much that I'm building from scratch, including the two enclosures, the complete RTP3D preamp. It will have the 'D' version supply, but will still use the point to point construction of the 'C' version for the preamp itself. It is fully assembled and tested, but still have to complete some work on the enclosure.
Vacuum State SVP-2, ver2 Preamp,I've always been a great fan of Allen Wright design. Its preamplifier cookbook is a must read. This preamp is the little brother of the renowned RTP3, but single ended. It uses all of Allen's tricks to get the best result from tube circuit: HV Shunt SuperReg, best sounding Super Linear Cathode follower with FET current source, precision and matched parts for perfect RIAA correction and channel matching, great volume control using Elna switch and SMD film resistors, etc. Even the PCB design is very special, all signal traces are on the top of the board, and never cross underneath. The board bottom layer has only the GND and supply traces. This preamp has also a great phono stage section. I have to say that it matches, if not betters the Audio-Research PH5 I used to have. It is just lovely, perfectly silent. Superb preamp. See www.vacuumstate.com for the preamp description, and excellent review from HiFi+ . See also www.sixmoons.com for a great review of the RTP3D.
Mark Levinson ML38S upgraded to ML380S and two ML38, built from scratch, a long story, see the Audio Projects
and also, see www.marklevinson.com and www.stereophile.com for a review
Ayre K-3rp with phono option and remote, Famous preamp, little brother of the K-1, to go with the V-3. See www.audioreview.com for a review.
Stevens & Billington TX102 Passive TVC preamp, Nice passive preamp that I built for a friend, then I found my own NOS pair of TVC (Transformer Volume Control), so I built one for me too. Looking simple but it is full of features, 6 inputs with one balanced, 2 RCA, one balanced and one record outputs. It has a Mute, Hard/Float input ground and Chassis/Float output ground for RCA or XLR, and the usual 0/+6dB Gain switch. The TX102 is still available from S&B but cost more than Ł1000 a pair! For details see: www.diyaudio.com, manufacturer S&B website www.stevens-billington.co.uk and now their own preamp from Music First Audio www.mfaudio.co.uk
UGS ''All Inclusive'' preamplifier using UGS gain module inspired by Nelson Pass, completely dual mono with external supply, with extensive microcontroller control, digital encoder, and relay step volume controller. See my Audio Projets for details.
Preamp, Great little passive preamp with three selectable line
inputs, and a superb Khozmo 48-steps attenuator, Silver contact switch, CNC machined PA11
aluminum body, Precision ball bearing support, Dale RN55 and Caddock resistors, see for www.khozmo.com
Heretical Tube Line Stage Preamp, Tube preamp with Unity Gain. Design optimized for Low distortion and very low noise floor using the ECC88 tube and CineMag Input Transformers. See Audio projects for details.
ForePlay Tube Preamp, using Pearl Tube Coolers (μP controlled and remote), see the Audio Projects for details
Pass Labs Bride of Zen, see www.passdiy.com and the Audio Projects
Placette, style passive shunt volume attenuator with remote control and display. See the Audio Projects and the original product at www.placetteaudio.com. This attenuator will be installed into "The Pumpkin" Fet Preamp with "The Shunty" dual mono shunt regulators. See Audio projects for details.
Bryston .4B, A very nice little preamp, see www.technofile.com for a quick review,
Amplifiers and Integrated:
SimAudio Moon W-5 Amplifier, Full dual mono monster, with huge bass slam but still capable of delicacy and air. Fully differential solid-state class-AB (5W class-A) power amplifier. Continuous power: 190W into 8 ohms, 380W into 4 ohms and it weights a ton. See reviews at: www.soundstage.com and www.stereophile.com
SimAudio I-5 Integrated Amplifier, Class A, 75W 8 ohms, 110W 4 ohms. Can be used as a preamplifier with the W-5 amplifier. See www.simaudio.com for details.
Ayre Acoustics V-3, Class A, full Mosfet, 100W 8 ohms, 200W 4 ohms, Stereophile "Class A" Recommend, Powered by my best Furutech Alpha3-OCC power cord, and connected to a dedicated Furutech AC outlet, see Stereophile Review
Audiomat Arpčge (Opera Upgraded), Class A EL34 Tube Integrated, just read the reviews, such a gorgeous sound.I upgraded it to Opera status by modifying the HV supply. I added low ESR 2200uF/450V electrolytic caps, bypassed with ClarityCap massive TC700 Series 110uF/700V film cap, caps mounted directly behind the output transformers as the Opera. The only real differences between an Arpege and the top of the line Opera are a remote control volume, mute switch, better RCA and speaker connectors and these caps in the supply. My speaker connectors are upgraded to top grade WBT, and the stock ALPS volume pot was upgraded with a nice Noble. See reviews at: SoundStage Review, Mutine Audiomat Reviews,
PassLabs Aleph30 (DIY), see the Audio Projects section
Vacuum State DPA300B, Famous 300B tubes monoblocks. The best match for the RTP3C preamp. One of the best tube amp on the market probably. Made from kit. Took me two years to complete...
Peter Daniel Gain Clone: www.6moons.com/audioreviews
Digital Audio Music Server:
Mac Mini based Audio Server, My first little music server based on a small Mac Mini computer (OSX Snow Leopard, 4GB RAM, 2GHz Intel Core 2 Duo, 120GB internal HDD) with external harddrive, iTune program and database. There is a small M-Audio Firewire Audiophile DAC that is used as Firewire to Spdif interface only (it also includes a very good headphone amplifier). I'm using my excellent Yamamoto tube output DAC as music source and my iPad as remote control. I use the Remote, a free application downloaded from the Apple App Store. This application turns your Apple portable device such as iPad, iPhone or iPod Touch into a remote control for your iTunes media player. See details on www.diyaudio.com.
This excellent site explains a lot about the Mac Mini as server: www.monarchyaudio.com.
Other nice Computer audio guide: www.linkwitzlab.com.
See this site to how to remotely control iTune with your iPad www.simonblog.com.
M-Audio Firewire Audiophile Dac www.soundonsound.com
Mark Levinson ML390S Compact Disk Player and DAC, probably the best player Mark Levinson ever made, see one of the review at www.stereophile.com. It is also a great DAC with external inputs using the same expensive PCB material as the ML380S preamp, nude Vishay laser trim resistor the I/V converter, great transport (same as the ML37), etc... The original superb hi-res Mark Levinson pictures can still be seen at www.hifishock.org
Mark Levinson ML37 Compact Disk Transport, one of the best transport ever made, see: www.marklevinson.com
Upgraded in 2010 with the newest CDPRO2LF drive. The ML37 used from the start an external low jitter clock mounted on its digital In/out PCB to drive the CDPRO2 inside it. I did the same mod on the newest CDPRO2LF so it can use the ML37 own clock. See this web page for some details: www.diy-high-end.com
Ayre Acoustics CX-7emp, Very analog and musical CD player, one of my favorite. Custom 16x digital filter, twin massive power transformers—one handles just the digital circuitry; the other the analog, Discrete Fet supplies without feedback, and a very special I/V converter based on AD844 diamond buffer that insures an analog sound. See for details: www.ayre.com, and for reviews: www.soundstage.com, www.stereophile.com, Audiophile Voice Review
Pono portable Player Great little portable player but with great sound, designed by Ayre Audio founder and head designer Charles Hansen. Originally a Neal Young Kickstarter project, it was designed from the ground up to support HiRes files and to provide unparallel quality play back. I'm using it as music server and superb testing music source. See ponomusic.force.com
Teac Esoteric DV-50 Universal Player used as player and transport, on of my reference sources, see: www.teac.com/esoteric
Yamaha CD-S1000 SACD CD player. Just a gorgeous machine built like a tank. It is just awaiting to be modified to transform it into a killer player and transport. With minimum modifications it can becomes a CD-S2000 with balanced outputs. The only difference between both machines is a separate transformer for the Audio section power supply and a few missing parts on the Audio output board. Both machine use the same board, so it is easy to upgrade. And just had a low jitter clock with its own supply and it becomes a superb transport.
Primare CD31 Superb CD player. With balanced outputs, fully balanced (double dac) discrete outputs. Modified with soft recovery diodes for the audio supplies and EMI filter replaced by an Ayre filter. See review at: www.stereophile.com
Pioneer DV-563 (Universal Player, modified supply and output), see the Audio Projects section
Pioneer Elite PD-65 (Used as transport)
Rotel RCD-965BX Trusty little player, used for testing for my projects
Digital to Analog Converters:
Mark Levinson ML360S , 24bit/96Khz Reference quality DAC. Full dual mono, Dual PCM1794 R-2R DACs per side that run at 8fs (352.8kHz or 384kHz), nude Vishay I/V converter resistors, Madrigal custom designed input receiver circuit, AD9850 Direct Digital Synthesis digital clock based on a continuous recalculation of the long term input data rate, four 32-bit DSP chips to handle digital filtering and decoding, four-layer cyanate-ester printed circuit DAC boards (hence the `S` designation) and parts upgrade all around. It has ton of Inputs and all formats, and Digital Output. The 360s is quick and agile with solid fondation. It is very sweet sounding, airy and fluid in the highs as well as being relaxed in the mids. It is very refined overall, never fatiguing. I like it very much and it matches the rest of my ML gears quite nicely. The fact that it is limited at 24bit/96Khz doesn't bother me at all. I'm using the M2Tech Evo through the ST glass interface with my mini-Mac music server and the sound is just superb . See reviews: www.hifi-advice.com, www.stereophile.com
HQ-Audio ES9018 Reference DAC ESS Sabre32 New Reference 24 bits/192Khz & DSD DAC. Very sophisticated implementation of the excellent ES9018 32 bits ESS DAC chip with tons of features and superb PCB layout. These features are, just to name a few: 4 inputs (SPDIF coax, AES/EBU, Toslink and USB), USB using the excellent Amanero interface (Full ground isolation from USB module and I2S isolator with ISO7640), Ultra low noise 100Mhz crystal clock (jitter of 0.5psec) with buffer, Separate fast shunt regulators for digital and analog sections, etc. The V/I analog section is dual mono discrete Class-A inspired by the famous dCS Dac. It is a fully differential, no feedback discrete current amplifier with balanced and single ended outputs supplied again by shunt regulators. The I/V resistors were upgrade to Z-Foil nude Vishay resistors. It was a remarkable upgrade. The DAC supports 44,88,96,192,352 and 384KHz PCM and DSD to play SACD. It has full remote control of inputs, volume, filter, etc and has a 4x20 digital display. I didn't used the standard EI core power transformers but instead I made my own PCB that supports Talema toroids, dual mono for the audio and separate transformer for the digital section, see the Audio Projects section for more detail. See for details www.audiodesignguide.com and www.diyaudio.com.
HQ-Audio DAC End 3 An other excellent kit built by HQ-Audio built around the renowned NOS AD1865 DAC with 6H30Pi IV Tube outputs. I was able to source a parts kit. The AD1865 Analog Device chip is considered by some to be the best sounding Non Oversampling 18 bits DAC chip ever built. This DAC is using multiple shunt regulator supplies and a separate IV section using tubes. It has two switchable digital inputs, one optical the other coaxial. For the best sound an IV section uses one tube per channel. It supports three tube type, the 5687, 6Dj8 and 6H30. I use it configured for the 6H30Pi. Each tube is run with its its two sections run in parallel for better drive capacity and transparency. The tubes HV supply used a Salas HV Shunt regulator with a CLC pre-filter. The tube heaters are driven by a low noise, LDO regulator. The best parts are used throughout both PCB, for more detail see www.diyaudio.com.
Yamamoto YDA-01 DAC clone (DIY) Mine is special, a reproduction of the marvelous Yamamoto YDA-01 DAC, but with Solid-State and Tube (YDA-01B) outputs into the same DAC, selectable with just the flip of a switch. It has also dual selectable digital input and DIY Ayre line filter. First of my projects to use PCB with no solder mask or copper trace plating. I call it 'Pure Copper' PCB. The bare and shiny PCB traces are covered instead with a thin layer of clear lacquer, than burn away when soldering the parts (and smell good doing so). The Solid-State output board is supplied by Shunt regulator.
The Tube output section is also slightly different. It is still using WE408A tube, but has a different CCS, different cathode loading and grid stopper for an even better sound. I love this DAC.
All internal wiring is done using Neotech Solid-core UP-OCC COPPER Wire, Teflon jacket.
See some great reviews of these DAC on 6moons, ss version review: 6moons.com-YDA-01, and the tube review: 6moons.com-YDA-01B
Yamamoto YDA-01B DAC clone I like the YDA-01so much that I built as well the tube version for me. With a custom toroid transformer, and Yamamoto Teflon tube sockets and terminal strips, M-Lytic Mundorf HV cap and ClarityCap MR output coupling cap. A few weeks back my and friends we compared this Dac with the new Meitner MA-1 (7K$), and the Naim NDX and the NAD M50 music player in a streamer/server test bed. Guest what the Yamamoto was way better than the Naim and the NAD using an other Dac, and as good as the Meitner! We also listen to some excellent hires files (192/24 bits) files from Fidelio, and the Yamamoto and Meitner were very close, with a little edge from the MA-1 part. This is how good this Dac is and considering the price difference between both dac, the Yamamoto is a steal.
Behringer UltramatchPro SRC2496 Sample-Rate Converter & ADC/DAC The Swiss Army knife of the digital conversion. Great little machine that can do almost anything you can dream of to do to audio or digital data. It can upscale/downscale (32 to 96Khz) or change the bit length (18-24 bits), switchable de-emphasis all this done using the CS8420 Sample-Rate Converter and transceiver, convert audio to digital (using an AK5393 24/96 ADC chip), or digital to analog (using an AK4393 24/96 multi-bit DAC chip), all this balanced or single ended and with three types of In/out digital interfaces each (AES/EBU, SPDIF both transformers coupled and optical Toslink). It has a ton of leds to indicate the bit word status and even an headphone amp (using hi-current op-amp RJM4580), vu-meters, internal or external clocks, etc. It is a very useful tool and allows you to listen to upsample music on the fly, without to have to rely on a computer. See this interesting review www.hifi-advice.com and details at www.behringer.com
Buffalo-II DAC ESS Sabre Reference 24 bits/192Khz DAC (8 channels combined to 2 channels for exceptional low noise floor) based on Twisted Pear Audio Buffalo-II DAC PCB with USB, BNC, AES/EBU, optical Toslink & ST inputs, see www.diyaudio.com for my own contribution, an interconnect diagram that illustrates the different modules I used. The I/V conversion is done using the dual mono Counterpoint fully discrete symmetrical converter, fully balanced output, DC coupled, see it own thread on www.diyaudio.com. To supply the Counterpoints I used two Placid-BP shunt regulators, one per channel with their own power transformer. To convert to Single Ended (SE) I used my own version of the Ballsie converter combining the buffer section of the new Legato so I can drive headphones as well. The volume can be adjusted using the built-in ESS excellent digital volume control and the I2C Volumite controller. See my own project at www.diyaudio.com and www.twistedpearaudio.com for details.
Pass Labs D1 DAC Clone, Version 3 A classic Balanced PCM63P-K DAC but using Borbely FET I/V converter and all discrete Borbely FET Low noise analog supply. See my Audio Project section for details.
Super Tube DAC with low jitter PLL clock and Tube Output, see the Audio Projects section and the original designer site see: Original Project Page (Explorer only)
SDS-Labs Tube DAC, using a pair of PCM63-K DAC chips (maybe one of the best DAC chip ever made), passive I/V conversion (using a Riken resistor) and Shunt Regulated Push-Pull (SRPP or Mu Follower) all tube output. I'm planning to use it for an upcoming music server. My own version has some improvements and modifications such as two selectable inputs (SPDIF BNC and USB, using the Hagerman "HagUSB" SPDIF-USB converter, CLC filtering on all digital IC supply pins, Oscon caps, screen ground plane, Jensen paper in oil coupling caps (and AuriCap film bypass caps), Takman carbon film resistors in the Tube section and mute relay at power-up. The supply is using custom built toroid transformers. See www.quadesl.com for details.
dAck! Original and Clone, a TDA1545-CS8414 DAC None Over Sampling, see the Audio Projects section and www.ack-industries.com for details. I use it with my headphone. Very nice sound with no fatigue.
Audio Zone DAC-1 clone. a TDA1543 DAC None Over Sampling, clone of the with No digital or analog filters, Passive I/V conversion, Active input driver/buffer, 4 active regulators with extensive CLRC filtering, BNC input (75R), Single ended output, see the Audio Projects section.
Thorens TD124 turntable with SME3009 tonearm, Newest acquisition, a real classic. The Thorens uses an AC 4 poles induction motor, belt/idler wheel drive, 16, 33, 45 and 78 rpm, mechanically switched, pitch (using a clever "Eddy Current Brake"), platter weight 4.5 kg (steel), aluminum subplatter with clutch, manual operation. Probably one of the greatest engineered turntable ever. Designed specifically for one job only, spin records. Mounted on it was a very nice SME 3009-S2 tonearm. The Nylon knife-edge bearing was be upgraded to a CNC bronze knife bearing. Cartridge is the Nagakoa MP-110 MP MM 5mv Output, 18 µm/mN compliance, Superfine polished elliptical bonded diamond with 0.4 x 0.7 mil radii and weight 6.5g. Phono Preamp is the tube Haggerman Cornet 2, mods to the max, see phono preamp section. See www.soundfountain.com and www.analogue-classics.com or www.theanalogdept.com for some interesting discussions on the Thorens. For the SME 3009 and its variants, see www.analogue-classics.com. Nagakoa MM cartridges are well known in Japan, see this nice stereophile Michael Fremer reviews of different cartridges, where the Nagakoa MP-300 came out one of the best and more musical www.analogplanet.com . The MP-110 is its little brother (5mV output, 18 µm/mN compliance, Superfine polished elliptical diamond stylus, weight 6.5g) which weight and compliance were better suited to the SME tonearm, and it is cheaper too!
Teres model 100, DIY turntable with Graham 2.1 tonearm and Ortofon Kontrapunkt-H MC Cartridge. This turntable is no longer available as a kit. I was able to get the acrylic platter and the bearing kit from an other user on www.diyaudio.com, see my project development on this link. My teardrop wood base is done. It is made of dried maple, laminated and ready for finishing. The wood is so nice that I will only put a clear lacquer finish. The plinth will be loaded with lead to add weight and to absorb the plinth's resonance. I have 3 diamond cones feet on order to put under the turntable. I just got for Christmas the Teres Delrin record clamp. See www.teresaudio.com for an picture of what it will be. I have my own version of Mark Kelly battery supplied Maxon motor controller already built and ready to go, see the audio project section. I'll use the new mylar tape drive using the Teres tape pulley. The motor pod is a recycled very nice sensor aluminum enclosure with a machined custom top plate that fits the Maxon motor. Finally, a DIY Schroeder tonearm is in the pipeline. I'm getting help from an other diyaudio member for the Schroeder machining. See: www.vinylengine.com and www.theanalogdept.com. Tonearm is the Graham model 2.1 tonearm, maybe one of the best unipot design, except the famous Graham Phantom II . It has all the 2.2 upgrades minus the ceramic wand (Top bearing and tungsten side weights). This arm have some of the best setup tools included and allows on the fly VTA adjustment. See a review at: www.stereophile.com. To connect the arm, that is sold without interconnect cable, I'll use the own Graham top-of-the-line IC70 cable, again one of the best tonearm cable. It is a silver interconnect with separate Teflon insulated L/R wires. It is terminated with the 5 pins DIN connector at the tonearm and RCA Bullet plugs at the other end. Cartridge is the Ortofon Kontrapunkt-H MC (0.47mV output, 12 µm/mN compliance, Nude FineLine elliptical stylus, weight 10g). See Ortofon www.ortofon.com for details and a few reviews at: www.6moons.com and www.audioasylum.com.
Michell Tecnodec turntable with Rega RB300 tonearm (with Michell upgrade TecnoWeight, VTA adjuster and record clamp). I built also an upgrade dual Speed High Capacity DC Supply and an upgrade mounting platform for the Technodec. The Platform is a laminate of high quality Birch ply, MDF and Brushed Aluminum. The RB300 tonearm has upgraded Cardas tonearm wires that connect to a Cardas CPIB Phono Block mounted on the upgrade platform.
See: www.michell-engineering.co.uk (what a beauty...) and the diyaudio thread
Cartridge: Benz Micro ACE, MC low output: 0.4mV output, Nude line-contact stylus, weight 8.8g
Kyocera PL-701 Full-automatic belt driven turntable, ceramic sub platform, carbon fiber headshell with Denon DL-107 MM cartridge: 2mV output, 9 µm/mN compliance, DSN-20 Stylus, Tip spherical, weight 8.0g
Other Cartridges MM:
Ortofon 2M Blue MM: 5.5mv output, medium 20 µm/mN compliance and Nude Elliptical Stylus, weight 7.2g
Grado Blue MM cartridge: 5mV output, 20 µm/mN compliance, Elliptical Stylus, weight 4.8g
Other Cartridges MC:
Benz Micro ACE(SM) Medium output MC: 0.8mV output, Nude line-contact stylus, weight 8.8g
Denon DL-103 Low Output MC: 0.3mV output, low 5µm/mN compliance, special 0.2mm round Stylus, weight 8.5g
Denon DL-110 High Output MC: 1.6mV output, low 8µm/mN compliance, special elliptical Stylus, weight 4.8g
Accessories: AcousTech Digital Stylus Force Gauge, Shure Precision Stylus Force Gauge SFG-2, Decca MK3 Record Brush, Hagtech Inverse RIAA Filter for burn-in Phono Preamps, Consonance Strobe Disk.
Paradise Phono Stage, version R3 (DIY) Fully dual mono discrete phono preamp with shunt regulator and an external dual mono supplies. Read the complete MPP thread or jump directly at www.diyaudio.com for details. See my own built at: www.diyaudio.com
Hagerman Audio Labs Trumpet Reference Tube Phonostage Clone (DIY) Based on the original Trumpet (Stereophile class-A recommended component), it is a balanced tube design for the MM section and FET MC front-end. My own version doesn't used uP control but rather switches to control all functions. In addition to standard RIAA equalization, three other curves used in the LP "microgroove" era have been included. I designed my own PCB and implemented my own internal layout. See details at www.haglabs.com
Hagerman Audio Labs Cornet 2 Tube Phonostage A nice preamp with no feedback Pure Class A single-ended amplifier stages, split RIAA Passive equalization, Cathode follower output with CCS loading, Vacuum tube HV rectification and DC heaters. This particular version was built without compromise: the best long life, low ESR or audio grade Nichicon electrolytics wherever possible, Mundorf Supreme coupling caps, matched Takman Rex carbon film resistors exclusively, etc. The chassis is a work of art built by Landfall Systems with engraved labels. It includes the following NOS tubes: RCA 5Y4, CBS blackplate 12AU7, matched pair of Tunsgram 12AX7.It is very quiet and resolving yet smooth and organic. It's not slow and "vintage" sounding at all. See my Audio Projects section for details.
Borbely Phono Stage(DIY) Fully dual mono All-JFETdiscrete phono preamp using the Borbely Low Noise Regs external supply. Very nice preamp originally published in AudioXpress magazine in a two parts article in 2005. Replica of the Borbely original EB-804/419 all-JFET MM/MC phono preamp kit.
Lehmann Audio Silver Cube Phono Stage Clone (DIY) One of the best solid-state phono preamp out there. I made my own version of it. See description at: www.lehmannaudio.com and reviews at: www.tnt-audio.com. There are also great pictures at: www.avbuzz.com
JLTi PhonoPre PhonoStage with the upgrade power supply. An other one of the best solid-state phono preamp ever made. It has selectable MC/MM gain. The Power Supply is pure Class A Constant Current “SuperReg'', diamond buffer input stage with zero-negative feedback, passive RIAA, high quality resistors and capacitors, etc. This site explains the principle behind this very unusual yet elegant design: www.customanalogue.com. See a reviews at: www.positive-feedback.com and www.tonepublications.com. See also great pictures at: www.frank-landmesser.de
K&K Audio Premium 'Maxxed-Out' Kit Sophisticated tube phono preamp with switchable Mc/MM inputs, selectable MC load and single ended/Balanced Outputs using the famous Lundhall transformers for power, MC Step-up and Line outputs. This particular model has all the options installed in; the Premium MC Step-Up with Cardas 6N high purity copper coil transformers, Cardas Parafeed caps, Stereo/Mono switch and high quality Volume control option (23 position Seiden switch and discrete surface mount audio-grade metal film resistors and low value Audio Note resistors in the signal path). See: www.kandkaudio.com for the specs, see a reviews at: www.audioasylum.com and the Art Audio 'Vinyl Reference' that is quite similar: www.6moons.com
LC-Audio RIAA Phono Amplifier with MC Light Powered Step-Up, my own DIY version. Very intriguing MC headamp circuit that is supplied by light generated by small light bulbs that in turn illuminate photo diodes producing pure DC supply voltage. So in fact the MC section is floating eliminating any supply and ground loop noises. The MM section is supplied using LC-Audio own Low noise dual regulator modules. I built it into a single enclosure with MC/MM selector, and Mute switch. All these function are selected by relays. The MM selection acts as a standby mode for the MC section turning the light bulb off to extend their life while keeping the rest of the preamp turn-on. It sounds very nice and very quiet. One of my best phono preamp. See www.lcaudio.com and www.diyaudio.com for details.
Graham Slee Era V Gold Clone (DIY) A reproduction of the excellent Graham Slee phono preamp, same parts, same PCB, different enclosure. Graham really knows his stuff, this one been on Stereophile Class-A list for four years. See his excellent design discussion on the 'General Phono Preamp' kit on its forum and see all the awards he got. They cannot be all wrong! A great preamp. See the details at www.gspaudio.co.uk.
Bent Audio Mu
MC Step Up Transformer Using the renowned S &B TX-103, no longer
available separately, see: www.stevens-billington
for the specs, see a review at: www.audioasylum.com
Pass Labs XONO (DIY) One of the best. Dual mono phono preamp, see my Audio Projects section for details.
Pass Labs Pearl II(DIY). Excellent preamp with mono PCB and external supply. See my Audio Projects section for details
Pass Labs Pearl (DIY) phono preamp with MC option, see my Audio Projects section for details.
PhonoClone3 (DIY) MC dual mono phono preamp, a clone of the very nice 47Lab PhonoCube, see Audio Projects section. Now in its third version, using a new supply design and refined PCB layout. I have to say it is probably one of my best preamp. You cannot go wrong with this one. Best performance to cost ratio. See www.diyaudio.com for details. I sold my first PhonoClone ver 1.0.
Peter Daniel PhonoClone Version (DIY) MC dual mono phono preamp, a more direct clone of the very nice 47Lab PhonoCube, but with a fancy shunt regulator supply, and very expensive V-Cap Teflon coupling caps, Caddock resistors, Muse and Black Gate Capacitors, etc. see my Audio Projects section for details.
Record Cleaning Machine:
VPI HW-16.5, see: http://www.vpiindustries.com/16_5.html
Sansui TU-9900 with upgraded output section, see: fmtunerinfo, some nice restoration pictures at http://amp8.com and my restoration story at diyaudio
Sansui TU-777 Gorgeous retro look with its circular dial indicator and great sound. Totally discrete parts tuner, including a discreet MPX circuit. This one has an almost perfect front glass panel and some nice upgrades: Muse Gold Supply caps, upgraded power transformer, IEC320 AC inlet and Vampire output connectors. Some nice restoration pictures at http://amp8.com
Sony ST-5000F with upgraded (supply, caps, RCA and AC IEC320 connectors, see: fmtunerinfo
some nice restoration pictures at http://amp8.com. It has 5-gang tuning capacitors, an 8-stage IF filter section, 4-pin ceramic type and an all discrete multiplex section. It has a beautiful sound, and that "in the next room"i, it really seems like you have musicians in your house. Amazing performance for a 30-year-old unit.
Yamaha CT-810 Nice little tuner that matches my new Yamaha CD-S1000. I bought it for that. Mods the Supply with new soft recovery rectifier diodes and MUSE Nichicon Audio caps. New audio output film caps instead of the electrolytic. Replaced a burned meter lamp. The frequency dial knob was very stiff, it should had been rotating freely and with speed with the big flywheel on the back. Disassembled the tuning knob and shaft. Was stick together because of old grease. Cleaned the shaft and apply silicone oil. Re-assembled and bingo! Now the dial is fast and smooth. Retuned the front end and fine tuned the dial accuracy. I compared it with my reference Sansui TU-9900 and the sound is very similar. Very nice and good little tuner indeed. See: fmtunerinfo
NAD 4300 Monitor Series with upgraded output capacitors.
Tivoli Model One, Platinum Edition, table radio, great sound, see: www.tivoliaudio.com
Denon DR-M44HX Vintage cassette tape deck. My son wanted to record his first tape after seeing the Guardians of the Galaxy movie. Got this very nice tape deck for a song. It was an expensive and very good model at the time. See: www.hifiengine.com
AKG K-702 Reference Studio Headphone, www.akg.com. The best pair of cans I ever had, just gorgeous. I use it all the time working at my bench.
AKG K-701, www.akg.com. Loved the K-701 so much that I bought a pair of K-702.
Sennheiser HD600, www.sennheiserusa.com
See this review of 50 great headphones at www.head-fi.org
PS Audio GCHA Amplifier: I like it so much that now I have two. The original and the latest version with balanced inputs. This particular unit had being fully mods by 'Reference Audio Mods' in California for an even better sounds, see review: www.6moons.com
Borbely All Fets, Class-A Headphone Amplifier,using the Borbely All Fets Low Noise Regs as supply. A project of mine. It is a fully dual mono built using high quality parts all around such as Noble volume pot, Muse, Nichicon KG & Wima caps, Vishay CMF55 and MK132 resistors, J74/K170 matched fets, etc. See my project at: www.diyaudio.com
It is really close to the Aural Audition headphone amp, now discontinued, see this review with great pictures at: www.6moons.com.
Lovely Cube Headphone Amplifier. A DIY clone of the excellent Lehmann Audio Black Cube Linear (BCL) updated to the SE status. See the Projects section for details, www.lehmannaudio.com. See this link for an excellent review of the original BCL www.soundstage.com and this one for the SE version www.i-fidelity.net.
Sapphire Headphone Amplifier by RJM Audio. I can say that the best headphone amp I ever built so far and also a winner for the price. It is one of my best amps, equal to my beloved PS Audio GCHA (I got two ;) Built it if you need an headphone amp. See the Audio projects section for details.
PPA Headphone Amplifier with YJPS Shunt Regulator Power Supply. A very sophisticated cans amp with virtual ground power supply, fully discrete diamond buffer output, adjustable bass boost control, etc. See the Audio projects section for details.
Objective2 (O2) Portable Headphone Amplifier with integrated USB ODAC (update 2014) The O2 is a small unique headphone amp that compares well in listening tests with much more expensive gear. I built three of these for my sons and one for me. See www.diyaudio.com for details and the original designer thread at http://nwavguy.blogspot.ca. My own version was upgraded in 2014 to add the USB ODAC. It is now an O2+ODAC combo. For the new ODAC, see ODAC blog, and it integration into the O2, see ODAC-Update blogs. To find the O2 and ODAC pcb, enclosure, parts and more, see www.jdslabs.com
Zen DIY Class A Amplifier: http://headwize.com
Headphone + DAC Amplifier: 192Khz, 24 bits DAC and Jitter reduction using the AD1896 (same IC and the renowned Benchmark DAC-1) and TPA6120 Headphone amplifier IC. The volume is controlled digitally by an AVR processor, see www.diyaudio.com
EL84 Tube Headphone Amplifier (project in progress): http://headwize.com
Verity Audio Rienzi on my main system. Gorgeous full range speakers using special midrange driver without any crossover for midrange purity and high efficiency. Two boxes design mechanically decoupled from each others, and the now famous Verity Audio bass module that can be used facing to the back or the front for the best in-room bass match, see: www.verityaudio.com for details.
IMF Compact Monitor 2 My latest acquisition. Very nice pair of almost mint studio monitors from the 70's. See them on www.diyaudio.com and some more info on the manufacturer site still available at www.imf-electronics.com
Eos by Enigma Acoustics on my Audiomat system. These incredible speakers are handmade by a friend. They use a 2-1/2 configuration and a reflex port underneath the enclosure. Very nice pair of speaker and esy to drive. An incredible match with the Audiomat Arpege. They are similar to the Lyra 2 by Revelation Audio but with different drivers, see: www.revelationaudio.com for details.
Dynaudio Audience 42, Audience 52 and Audience 122 for Home Theater, see: www.dynaudiousa.com
Axiom M3Ti: Nice little 2 ways monitor, no crossover, only one cap for the twitter, see www.axiomaudio.com
Yamaha NS-5X: Nice little 2 ways monitor, use for testing my projects
Dynaudio Finale Kit, with my own twist, see my DIY Speaker Project, 3 ways, Will be used in bi-amplification.
REL Strata III subwoofer, Closed-box loaded cabinet, 20Hz-120Hz: www.rel.net
REL R-305 subwoofer, Closed-box loaded cabinet, 20Hz-100Hz: www.rel.net, see a review at www.6moons.com,
Velodyne SMS-1 subwoofer EQ, The SMS-1 features Automatic or Manual In-Room Bass Correction with Included Microphone using DSP Control and On-Screen Display. See Velodyne for details
Samsung PN50A650 Plasma screen 50"- Full HD 1080i.
Oppo BDP-83 Blu-Ray and Universal format feature packed player. See a review at: www.avrev.com
Sony Bravia KDL40S504 LCD screen 40'' - Full HD 1080i.
Sony BDP-S1 Blu-Ray Player (with Firmware ver 4.30 upgrade, include Dolby Digital and True-HD decoding), review at: www.ultimateavmag.com
Anthem AVM20-HD processor. Upgraded in 2007 to the AVM-20-HD version which now as the same functionality as the AVM-50, with the addition of Anthem's digital video processor and HDMI connections. This digital video processing PCB is incredible. It is a 6 layers with gold traces and over 1800 parts. It is the same one used in the Anthem Statement D2. It includes the excellent Gennum VXP Digital Image Processor/Scaler for professional image result up to 1080p resolution. See the AVM-50 review at: www.hometheatersound.com
MCA-5 Amplifier (5 channels) and the Teac Esoteric DV-50 as superb DVD player...
Interconnects 36" (Single Ended - Pairs):
RCA Atlas Navigator All-Cu, symmetrical pseudo-balanced Double shielded with copper mylar plus close lapped 99.997% pure OCC copper. Direct silver plated OCC copper, non-compressing, double screened, self-cleaning RCA plugs
RCA Atlas Voyager, OFC copper, shielded, Direct gold plated, non-compressing, double screened, self-cleaning RCA plugs
RCA Atlas Element, OFC copper, shielded
Eichman Silver Bullet Plugs and Vacuum State Silver foil interconnect
RCA Furutech FP-101, Cable: Furutech FA-220 PC-OCC copper, shielded
RCA Cardas Wire Oyaide PA-02 PCOCC-A copper, shielded
RCA Cardas Wire: Kimber Tonik, Tri-Braid geometry, Varistrand Ultra Copper Conductors and Polyester sleeve.
RCA VAN DEN HUL M.C.D 102 MK III with Vampire RCA connectors
RCA WBT-0108 Wire: Litz braid (3 Silver and1
Oxygen Free Cooper wires), TFE insulation, Polyester sleeve, Belden braided shield
RCA WBT-0144 Wire: 1 strand Pure Silver with TFE insulation and Polyester expandable sleeve Belden braided shield
RCA WBT-0144 Wire: Canare L-2T2S (Shielded) and Polyester expandable sleeve
RCA WBT-0144 Wire: TFE 1/8 tube with 2 oxygen free copper, plated Silver AWG30 wire, Polyester expandable sleeve
RCA WBT-0144 Wire: Belden 89207, 100 ohms TwinAx, Tinned Copper and Bare Copper pair, TFE insulated, Duofoil Shield
RCA WBT-0144 Wire: Belden 83393, Tinned Copper Pair, Silicone Rubber, Foil Shield, Polyester sleeve
RCA Neutrik ProFi Wire: Cardas Crosslink 1L
RCA Neutrik ProFi Wire: Belden 83396, Tinned Copper Pair, Silicone Rubber (Red), Foil Shield
RCA Cardas and Cable twisted pair of JUPITER 28 awg, 6N Solid-Core Copper, Double layer unbleached Cotton, Wax-coated.
RCA Cardas and Cardas Crosslink 1L Interconnect Cable
RCA Neutrik ProFi and Cardas Crosslink 1L Interconnect Cable
Eichman Bullet Plugs and Cardas Tonearm Cable with shield (for turntable interconnect)
Interconnects 48" (Single Ended - Pairs)
RCA Neutrik ProFi Wire: Belden 88641 (Shielded), Polyester expandable sleeve
Generic RCA Wire: Coax Cable, all copper with TFE, Polyester sleeve, QTY: 2
Interconnects Balanced XLR (Pairs)
Furutech FP-702F and FP-701M XLR 3 pins, Cable: Furutech FA-220 PC-OCC copper, shielded, lenght 12 FT
Neutrik NC3FX and NC3MX XLR 3 pins, Cable: Furutech FA-220 PC-OCC copper, shielded, lenght 36"
Neutrik NC3FX and NC3MX XLR 3 pins, Cable: Kimber
Tonik, Tri-Braid geometry, Varistrand Ultra Copper Conductors and Polyester
sleeve, lenght 36"
Neutrik NC3FX and NC3MX XLR 3 pins, Cable: Canare L-4E6S (Shielded), lenght 12 FT
Neutrik NC3FX and NC3MX XLR 3 pins, Cable: Belden 83396, Tinned Copper Pair, Silicone Rubber, Foil Shield , lenght 12 FT
Neutrik NC3FX and NC3MX XLR 3 pins, Cable: Belden 83393, lenght 36"
Neutrik NC3FX and NC3MX XLR 3 pins, Cable: Custom wire (3 wires+shield), length 8 FT
WireWorld Ultraviolet 7 USB 2.0 cables with DNA-Helix geometry and carbon fiber plugs. It is using the same geometry as the famous Starlight USB cable but with slightly less silver plating. I have two, one length 1 m, the other one is 2m, see www.wireworldcable.com. Best USB 2.0 cable in 2010 by WhatHiFi magazine, see review www.whathifi.com. Starlight and Utraviolet cables are compared at www.adventuresinhifiaudio.com
Kimber Illuminations D-60, length 1 m, dual RCA connectors
Belkin Synapse Platinum Digital Audio Cable, dual RCA, 6FT length
Belden 1694A HD-SDI Precision coaxial 75 ohms, Canare RCA RCAP and BNC connectors, 6FT length, see www.bluejeanscable.com for great cables.
Canare LV-61S coaxial 75 ohms, dual RCA, 6FT length
(SPDIF) Amphenol 31-70000, True 75 ohms BNC Cable: Belden T9116,
Duobond Braid Shield, Low Loss, RG-6 75 ohms coaxial (2 cables),
(AES/EBU) Neutrik NC3FX and NC3MX XLR 3 pins Cable: Canare DA202, True 110 ohms digital cable (2 cables), length 48"
Optical Fiber Amphenol, 62.5um, ST connectors at both ends, length 3m
Glass Cable with armored jacket, 3
ft. High Bandwidth Audio Applications that
exceeds the 15Mbps data rates required by Toshiba's best TOSLINK
optical modules. Made with
470 Audio Data SILFLEX Glass Fiber Optic strands, see
Neutrik NJ3FC6 1/4 Stereo Locking Jack, Neutrik NP3C 1/4 Stereo Plug Cable: Canare L-2T2S (Shielded), length 12 FT
Straight Wire Octave, WBT-0645 and WBT-0644 banana connectors, one pair, length 11 ft
Totem Acoustic, oxygen free Pure copper pair cable with banana connector
TNT U-Byte DIY speaker cable: www.tnt-audio.com
ToneArm Upgrade Cables
Vandenhul D-502 DIN upgrade tonearm cable with Tiffany RCA connectors, uses with the Linn LP12 and its Ittok tonearm
Cardas upgrade tonearm cable with Bullet Plugs connector, uses on the Tecnodec Rega RB300 tonearm
Home Theater Cables
Supra HDMI Cable
BJC Belden Bonded-Pair HDMI 28AWG cables from www.bluejeanscable.com
Supra Speaker Cables.
Neutrik NC3FX and NC3MX XLR 3 pins Cable: Belden 83393, length 36", 7 Cables
Coax cable with BNC connectors for Sub-woofer.
AC Power Cables
Furutech Alpha3 PCOCC (12 AWG) cable, Furutech FI-25 (Gold) Connectors, my best...
DH Labs 'Red Wave' silver-coated OFC copper (10 AWG) cable, Furutech FI-15 (Gold) connectors, second best.
Furutech FP-314Ag one Silver plated (Live) & (Alpha) μ-OFC (14 AWG) cable, NeoTech connectors
Belden19364 Cable (14 AWG), shielded; Wattgate 320E IEC; Hubbell 8215C Plug
D.H. Labs Power Plus Cable (12 AWG); Wattgate 320E IEC; Hubbell 8215C Plug
Various AC Cables with Wattgate 320E IEC; Hubbell hospital grade Plug
Cardas Qualink AC Cord cable with Marinco and Shurter 320E IEC
Custom AC cord with multibraid 4X16AWG ultra pure copper strand, in nylon conduit and Marinco connectors
AC Power Distribution & Conditioner
Torus Power RM 2.5, power conditioner 2.5Amp with 4 medical grade outlets. It delivers true isolation through triple-screened toroidal transformer as well as low source impedance and ample instantaneous current. It utilizes Plitron ‘LONO’ (Low Noise) transformer design technology that eliminates audible noise in the power transformer and Cleaner Power: Torus products utilize Plitron “NBT” (Narrow Bandwidth Technology) to attenuate differential and common-mode noise without external circuits or components.
Furutech eTP80, power distribution bar, with 8 outlets, and Furutech power cord.
Hammond 1584T6DH, Hospital Grade, 6 outlets Power Bar, with upgraded power cord.
M2TECH USB to
192K/24bits Digital Audio Interface with Low jitter, low phase noise, high stability oscillators. Support 44.1, 48, 88.2, 96, 176.4, 192Khz
sampling frequencies. Inputs: USB 2.0 & external master clock. Outputs SPDIF x2 (RCA & BNC), AES/EBU (XLR), optical Toslink™ & ST, I2S
(RJ-45) with optional low noise external supply from TeraDak www.teradak.com. See www.m2tech.biz
for details. Great review at
Cambré CoreÔ system Audio Racks (Two of them), on my main system, see www.cambreproducts.com and Soundcare Superspikes as feet, see www.soundcare.no
Vibrapod Isolators, Cones, PEARL Tube Coolers
Hagerman Audio Labs "FryDaddy" Audiophile Burn-In Generator (my own clone version): www.haglabs.com
Hagerman HagUSB USB to SPDIF converter, see www.hagtech.com
SPDIF to Optical Toslink converter
Nov 2010, major news, After 10 years waiting to find the right parts, and the time to build such a complex speaker, I finally came across the parts I needed most, the original woofer and passive radiator used into the Finale. No need for more development or testing. I can use the original parts and crossover and build it as planned ;)
Tweeter D-260, 8 ohms, textile tweeter with ferrofluid
Midrange (Low): MW150 , 4 ohms (15W75 equivalent), 4" midrange/woofer, 3" aluminium voice coil
Midrange (High): D52-AF, 4 ohms, dome midrange
Woofers: 30W-100 XL with 30W-SL matching passive radiator.
Probably 2 boxes design, inspiration VerityAudio Parsifal model, www.verityaudio.com
High and Midrange Module:
First Order Crossover, Impedance Compensated, from bass module (As a Watt Puppy...)
Neotech Solid-core UP-OCC COPPER Wire, Teflon jacket Internal wiring
Pyramidal enclosure with bracing, Separate enclosure for crossover
Wall1 inch MDF+Asphalt Saturated Felt+Borosilicate damping
Aluminium 3/4'' plate separated by Sorbothane isolation pads
First Order Crossover, Impedance Compensated, Original Dynaudio Final design
Wall1 inch MDF+1/2" Birch Plywood+Asphalt Saturated Felt+Borosilicate damping
Extensive Bracing, Possibly Lead sheet on inside wall
Neotech Solid-core UP-OCC COPPER Wire, Teflon jacket Internal wiring
Sealed and using Passive radiator loading
Cabinet ACAD File: Dynaudio Speaker.zip (37k)
Dynaudio Finale Kit: Dynaudio Finale kit.zip (205k)
Excel Volume Box Calculator: Conv_Unit.zip (6k)
Ovation NX Amplifier 100W, Class AB with current feedback. It is an excellent design and heavily biased into Class A for good sound. The design has numerous clever tricks, check the protection scheme for examples and for details see www.diyaudio.com. See also the designer page at hifisonix.com for an excellent document explaining the design and how to build this very nice amplifier.
UGS ''All Inclusive'' preamplifier using UGS gain module inspired by Nelson Pass. I bought a complete PCB set from a french group buy done years ago (www.homecinema-fr.com sorry in french only). This preamp is very sophisticated and includes everthing from the rear panel to the custom machined front panel. It as 4 inputs, 2 outputs per channel all single ended or balanced, 7 trigger outputs and a gain adjustable stereo subwoofer output. It has a separate dual mono power supply, dual mono inside layout, with UGS gain module (K389/J109 famous fets), digital relays step attenuator and relay source selection ad Mute. All this we would not at be possible without an extensive mP controller. It is using an Atmel ATImeg64, 16Mhz processor, digital pots IC, 2x20 LCD display with backlight, digital step encoder, etc. I had access to complete source code, one the major reason I embarked into this project. For details see www.diyaudio.com and when I meant a complex project see the complete PCB at www.diyaudio.com
Goldmund Mimesis 8 Amplifier Clone, for details see www.diyaudio.com. See also this interesting Goldmund Telos clone page at www.diyaudio.com. See this amp review at www.stereophile.com. The Goldmund original amps can be seen at www.goldmund.com. French project page with a smaller Mimesis MOSFET clone www.quebecdiy.net
HQ-Audio ES9018 Reference DAC transformer PCB. Used to install three Talema toroidal transformers into this excellent DAC in replacement for the standard EI core transformers. Support the DAC dual ac supply 115/230V switch.
Hagerman Audio Labs, Trumpet Reference Phonostage Clone . Based on the original Trumpet (Stereophile class-A recommended component), it is a balanced tube design for the MM section and FET MC front-end. My own version doesn't used mP control but rather switches to control all functions. There are two discrete timers for the Heater and HV supplies and the start-up mute. In addition to standard RIAA equalization, three other curves used in the LP "microgroove" era have been included. I designed my own PCB and implemented my own internal layout. See details at www.haglabs.com
HQ-Audio ES9018 Reference DAC, ESS Sabre32 New Reference 24 bits/192Khz & DSD DAC. Very sophisticated implementation of the excellent ES9018 32 bits ESS DAC chip with tons of features and superb PCB layout. These features are, just to name a few: 4 inputs (SPDIF coax, AES/EBU, Toslink and USB), USB using the excellent Amanero interface (Full ground isolation from USB module and I2S isolator with ISO7640), Ultra low noise 100Mhz crystal clock (jitter of 0.5psec) with buffer, Separated fast shunt regulators for digital and analog sections, etc. The I/V analog section is dual mono discrete Class-A inspired by the famous dCS Dac. It is a fully differential, no feedback discrete current amplifier with balanced and single ended outputs supplied again by shunt regulators. It supports 44,88,96,192,352,384KHz PCM and DSD to play SACD. It has full remote control of inputs, volume, filter, etc and has a 4x20 digital display. See for details www.diyaudio.com.
Tortuga LDR3x Passive Preamp. Tortuga release a DIY version of their excellent preamp. It employs digitally controlled audio grade light dependent analog resistors for the volume control insuring a very neutral sound. The nice kit support source selection (3), infrared remote (support the little Apple remote) and the new 2 digits digital display. I may end up using it with the SKA amplifier to create a nice integrated, see below. Kit details at www.tortugaaudio.com
SKA GB150D amplifier. This design went recently public domain at the designer's request. For details see www.diyaudio.com . Since the PCB design is critical in this case, I ordered the real one. I may well end building a nice integrated using the Tortuga passive preamp, see my other project. The designer site is at www.ska-audio.com
First Watt F5 Turbo V3 amplifier (In Progress...). I was able to buy a gorgeous Ayre V5 empty case on Audiogon and I'll use it to build my F5 amplifier. More details on this project soon. In the mean time see this great F5T project on www.fetaudio.com
Borbely Millennium 200 Monoblocks (In Progress...), Great amps from Borbely Audio that I had the chance to listen to at friends house. They use fully discrete FET front end, with Lateral MOSFET Final. I'll build a pair for me. This a private project.
Borbely All Fets Headphone Amp with companion All Fets Low Noise Discrete Regs, Fully discrete Class-A headphone amp and low noise supplies from Borbely Audio. I'll build one for me using extra parts from my Millennium project. I did my own PCB and I'll design a custom enclosure from FPE for it. This a private project.
Subbu DAC V3 - ES9023/WM8804 SPDIF, Nice, modern little DAC from diyaudio forum, designed by members. For details, see: www.diyaudio.com
Lovely Cube Headphone Amplifier. This is a clone of the excellent Lehmann Black Cube Linear (BCL) amplifier. I upgraded to SE status by replacing the supply main caps by Mundorf MLytic, the input coupling caps by Mundorf M-Cap MKP and Mogami audio cable, as the original SE. I also drive the opamp in ClassA. See this site for details www.head-fi.org for details.
Paradise Lost Phono preamp, version R3, Fully dual mono discrete phono preamp with shunt regulators and external dual mono supplies. I did my own PCB sets. Read the complete MPP thread or jump directly at www.diyaudio.com for details. See my own built at: www.diyaudio.com
Pass Labs D1 Dac Clone, Version 3. A classic Balanced PCM63P-K DAC using Borbely FET I/V converter and all discrete Borbely FET Low noise analog supply. It has Burr Brown DIR9001(on daughter board) digital receiver, no 2nd PLL, SM5842 digital filter, 4 x PCM63 in balance mode and Jfet IV. See www.fetaudio.com for details.
LC-Audio Low Noise dual regulator, my own DIY version. I'm planning in using them in my next Anagram Sonic-2 DAC and the LC-Audio own Phono preamp, see www.lcaudio.com for details.
LC-Audio RIAA Phono Amplifier with MC Light Powered Step-Up, my own DIY version. I'm planning in my new AirTight ATC-2 preamp to have an integrated phono section. I'll keep the power supply external for lower noise, see www.lcaudio.com and www.diyaudio.com for details.
RJM Audio Sapphire Headphone Amplifier. Two stages design with first a non-inverting op amp voltage gain stage then a second stage using a "diamond buffer" discrete current amplifier. See http://phonoclone.com for details.
Schroeder DIY tonearm clone (In Progress...). My Schroeder arm is almost completed. It missing only the wood wand tube. It has a micrometric VTA adjuster kind like the one on the Graham tonearm. Counterweight with fine adjuster brass screw, plastic (Rulon material) sleeve insert between arm tube and counterweight for smoother adjustment and vibration control. I'll use a kevlar thread for the pivot point. The mounting hole is the same as a REGA, lifter (JL-45) from Jelco. The lifter will need a custom slide section. The standard one is not long enough. See www.diyaudio.com for details.
PassLabs D1 ESS Sabre DAC, Fully Balanced discrete FET Class-A output stage without any negative feedback for the ESS Sabre DAC (see below). See www.diyaudio.com for details. I'll use Twisted Pear Ballsie Balanced to single ended converter to provide both type of outputs. See this mirror site for the original PassLabs D1 DAC: www.passlabs.com
Buffalo-II ESS Sabre New Reference 24 bits/192Khz DAC (8 channels combined to 2 channels for exceptional low noise floor) based on twistedpearaudio Buffalo DAC PCB with USB, BNC, AES/EBU and Toslink/ST optical inputs, see www.diyaudio.com for my own contribution, an interconnect diagram that illustrates the different modules uses. I'll also use their upcoming Counterpoint I/V discrete fully symmetrical converter, single ended or fully balanced output, DC coupled, see it own thread on www.diyaudio.com. I built my own Supplies, Digital Inputs, ST glass fiber optical input, Switch Input selector and Transformers PCB. Everything is mounted into a very nice custom enclosure that I designed and it was made by Front Panel Express with exotic wood side panels. See www.diyaudio.com and www.twistedpearaudio.com for details
PassDIY Pearl 2 Phono Preamp. I did my own PCB, smaller than the standard PassLabs design. It fits on 6''x9'' double side PCB material sheet I used. I got very nice Mundorf M-Lytic power supply caps, Vishay RN-60D resistors all around, and 0.1% CMF-55 resistors at key locations, see www.passdiy.com and www.diyaudio.com for details.
Anagram Sonic2 DAC (In Progress...) with TimeLock low Jitter Clock module built around Edel S2 development board from ABC PCB. See www.abc-pcb.com for details and full documentation. See also forum.stereophile.com for very nice pictures of this DAC. I just bought a sophisticated asynchronous I2S and S/PDIF FIFO and multiple SPDIF inputs/outputs kits to go with this dac. See www.diyaudio.com for details.
ZD-50 A sophisticated Gain Clone amplifier (In Progress...) based on the LM3886, see www.diyaudio.com for details.
B1-DC Coupled Preamp with Shunt Regulator, The Mesmerize, see www.diyaudio.com for details.
Sonic Frontiers Line 1 Tube Preamp(In Progress...). I got the main PCB from an other diyaudio member at a good price. It a fully balanced design with sophisticated regulated power supply, almost completely DC coupled signal path(just one very good quality, low value capacitor) using a DC servo, high grade power transformer, very high quality 2oz copper PCB, three tubes per channel, input tube polarized with CCS current source, etc. For the price, I can never build such a sophisticated preamp, very nice indeed. To complete it, was only missing a delay timing circuit for the HV relays and a mute circuit that close when the already built-in DC error protection was detecting a DC offset at the output. This PCB was extensively moded with the best available, Vishay Bulk Metal foil, Caddock and Holco resistors. Multicap Thin-Foil fim capacitors, soft recovery diodes and instead of using the IC volume control, I use two external Noble potentiometers (much better, and no need for computer control). The original Line 1 has also an Headroom™ crossfeed headphone amplifier module. I built one too..., see www.diyaudio.com for details.
MOX Active crossover. Fully adjustable, HPF and LPF, 6,12,18 and 24 dB/Oct. It is based on the PassLabs XVR1 Electronic Crossover. It can accept op-amp or discrete op-amp module. I'm planning to use only the LPF section to power in dual amplification a bass module for my Verity Audio monitors. See www.diyaudio.com for details.
Yamamoto YDA-01 DAC Clone, with the Solid-State and Tube output sections. Very musical DAC based on the CS8416 MUX Digital Receiver and dual PCM1794A DAC chips. I made my own boards, and did my own change to the original design (better reset circuit, multiple selectable digital inputs, etc). The Tube section is using the WE408A. See the review of the YDA-01 (Solid State Output) and the YDA-01B (Tube Output).
The ShigaClone, a low cost CD Transport based on the JVC EZ31B Boombox CD mechanism. It is a 47Lab FlatFish Clone, see the original site at: www.sakurasystems.com for details and my own clone version at: www.diyaudio.com
Cornet 2 Tube Phonostage. My own version of the Hagerman Technology Cornet2 Tube Phono Preamp kit. A nice preamp with no feedback Pure Class A single-ended amplifier stages, split RIAA Passive equalization, Cathode follower output with CCS loading, Vacuum tube HV rectification and DC heaters. I also installed the AuriCap Caps Upgrade. See: www.diyaudio.com
PhonoClone3, MC dual mono phono preamp. Upgrade of the original PhonoClone using better shunt voltage regulators and optimized circuit and PCB layout. See www.diyaudio.com for details.
Peter Daniel PhonoClone version, MC dual mono phono preamp. Clone of the 47Lab Phono cube with shunt voltage regulators optimized circuit and PCB layout. Very specific parts selection, choose for the best sound, such as V-Cap, Muse & Black Gate caps, Caddock Resistors, MUR860 rectifier diodes, etc. See www.diyaudio.com for details.
"Heretical Tube Line Stage" Preamp with Unity Gain (explaining the "Heretical" name) to go with the F1 amplifier as well. Design optimized for Low distortion and very low noise floor. It is using the ECC88 tube, CineMag Input Transformer (for single-ended and balanced inputs), Dual HV active regulators using Film caps. Separate Power source with Transformers and Soft Recovery diodes. Finally an elegant Servo circuit eliminate the output coupling caps, and allow the use of a very high quality Teflon, small value input coupling cap. See www.diyaudio.com for details.
SDS Tube DAC using the PCM63-K DAC chip (maybe one of the best DAC chip ever made), passive I/V conversion and tube output. I'll add a USB digital input for the upcoming music server. See www.quadesl.com for details. An old design, but I have all the parts so...
Tube Buffer (In Progress...). Basic cathode follower with a choke for the cathode resistor. With ceramic comp resistors. The tubes are Jan 5687's and the rectifier is a 6v4. The PSU is a CLCLCR using only big Solen film caps and Hammond chokes. It has Edcor input transformers and Jensen in oil caps at the output. Finally there is an ALPS Black Beauty volume potentiometer. See www.diyaudio.com for details.
Mark Levinson ML38 and ML380 upgrade done from scratch, a long story, see this link for few details: www.diyaudio.com
Mark Levinson ML36 DAC Great DAC (Burr-Brown PCM1702 and upgraded CS8416). I got myself a set of ML36 boards for a project that I did. I have already the original ML36 front panel and I will use my own ML38 front control PCB (they are almost identical) to control the DAC. I'll install everything into an enclosure and I had made especially for me a custom rear plate that reproduce the original ML36 rear panel. At the end, I'll get a complete ML36, DIY at work again...It was a long story, see this link for few details: www.diyaudio.com
Krell KSA50 Clone Amplifier, see www.diyaudio.com, It will be a fully dual mono amplifier with soft start and remote power On.
Pair of Aleph-X Mono blocks amplifiers, project still on development
Placette style, shunt step attenuator, see www.diyaudio.com
Tent Audio Low jitter clock module and low noise supply
Diamond Buffer PCB, see home.swipnet.se
SDS Headphone Amplifier with MOSFET Class A output, see: http://headwize.com
PassLabs Bride of Zen single stage preamp. Now superseed by the new B1 with Salas shunt regs.
My SuperDAC with low jitter PLL clock and Tube Output, see www.diyaudio.com for details.
Pass Labs Aleph30 30W Class-A Amplifier, see www.diyaudio.com
dAck! Clone, 1545-CS8414 DAC None Over Sampling, see www.diyaudio.com
TDA1543 NOS DAC based on Peter Daniel design, see www.diyaudio.com
Zen Headphone Amplifier, see it on www.diyaudio.com
Pioneer 563A, Universal DVD Player, Modified with new linear supplies, upgraded parts, new Jung Super Regulators and new audio section, see www.diyaudio.com
Amplifier Soft Start circuit and Main DC filter PCB, see www.diyaudio.com
X1 Pass Labs Preamp Clone (In Progress...) using UGS gain module clone and processor controlled 32 steps fully balanced attenuator.
Toccata (Work in Progress...), A variation of the Arthur Loesch Tube phono preamp Design by Thorsen Loesch. Using a sophisticated power supply design with Fast recovery diodes, extensive CRC and CLC filters, HV capacitor multiplier, dual mono HV shunt regulators and individual tube heater current regulators. The preamp circuit itself is using a Cascode Circuit using paralleled input valves with selectable gain (56 to 72 dB), split RIAA equalization, tube lithium battery bias, extensive ground layout, point-to-point wiring, great parts like PRP, RN60D and Mills resistors, Solen, Obbligato and Sprague NOS Oil caps and Amperex ECC88 NOS tubes . I even included the preamp drive stage to be able to drive almost any interconnect with ease. The final touch, a real Acoustic Research Reference Phono front panel, with all the AR functionalities, delay turn-on, standby mode, Muting, etc. See: Toccata and Toccata MKII
EL84 Tube Headphone Amplifiers (Work in Progress...), for details see headwize.com
HV Shunt Regulator PCB. Original Design by Emile Sprenger, Excellent HV Regulator, used for example by Vacuum State (www.vacuumstate.com) in their products. I designed a PCB for it, based on Emile's design. There was a small group buy for a commercially made PCB.
High Precision Turntable DC Motor Controller based on Mark's Kelly design. I did a complete custom PCB for it. It is using a high quality Maxon Swiss made motor and Greg Nuspel on diyaudio designed two custom pulleys for it. One using 1/2 mylar tape, the other just a string, see it on www.diyaudio.com
Bridged LM3886T 300W Amplifier with balanced DRV134 Driver Board , see it on www.diyaudio.com
DRV134 Drive board, see it on www.diyaudio.com
DAC +Headphone Amplifier Project, see it on www.diyaudio.com. I designed a suppl. PCB for this project, a RCA line output PCB using BG coupling caps and the LT1028 High-Speed Op-Amp.
Aya-DAC ver 2.0c, a TDA1541 (Double-Crown)-CS8416 DAC None Over Sampling, see: www.pedjarogic.com. I designed two suppl. PCB's for this project, a Transformer PCB to mount the 5 separate transformers needed for the multiples 8 & 16Vac voltage supplies by this DAC design, and an active BNC digital input PCB, based on the same AD8611 High-Speed 4ns comparator used into the Headphone DAC project. This DAC is now sold. See www.diyaudio.com for details
Aya II-DAC, revision A, a TDA1541 (Double-Crown) - CS8414 DAC None Over Sampling, see: www.audialonline.com. This the latest AYA version with SPDIF and USB selectable inputs. I got on Audiogon a nice Ayre QB9 used enclosure (silver) for this DAC. I made my own PCB. It is using a TDA1541 (Double-Crown) chip. This DAC is now sold as well. See www.diyaudio.com for details
"The Pumpkin" Preamp with "The Shunty" dual mono shunt regulators to go with the F1 amplifier. I will install my Placette attenuator into this preamp. The Placette in/out connectors will be available on the back to allow the Placette to be use with other systems if I wish to. See www.diyaudio.com for details.
An off the record, almost secret project of mine, a replica of the famous CTC Design, Vendetta phono preamp. Prototype is almost completed, but no proof yet that I can make it work. See www.stereophile.com and www.kogerer.ru for reviews. See also amp8.com for inside pictures.
Audio Function Generator 10hz-1Mhz, with sweep, DC offset, 50/600 ohms outputs with attenuator and trigger outputs, schematics: AudioGen.zip (80k)
Mutlifunction Frequency Counter with 1.2Ghz prescaler and oven heated reference clock, complete schematics: FreqCounter.zip (290k)
Mike Preamplifier, schematic: MicPreamp.pdf (22k)
I published in DIYMagazine (http://basaudio.net/diymag.htm)two articles on making PCB by yourself at home. They explain own I do it, what are my little tricks, the material I use, etc. You may find it useful in your own projects. They are in no way professional advices. I'm just an amateur PCB maker, probably like you. But it may save you a lot of problems. Have fun.
If your using Eagle PCB and want to send your PCB design for production, read my little guide of the needed steps to prepare your PCB files. It may save you some problems, see: www.diyaudio.com
Dallas Semiconductor 1-Wire Weather Station. Parameters available: Temperature, Frost index, Wind Speed & Direction, Relative Humidity & Dew Point, Barometric Pressure and Rain Accumulation
I live in Quebec, Canada with my beloved wife and our three great boys from 15 to 21 years old, our cat Kitty and the latest one, a little rabbit called Rocky.
AMB Laboratories DIY Audio
La Pavoni - The only real expresso machine, for the coffee DIYer in me