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S5-Electronics-K12-Tube-Amp-Kit1.JPGS-5 Electronics K-12 Tube Amp Kit (220V)6200 viewsAnother S-5 Electronics Tube Amplifier Kit from down under. This one uses a 220V transformer from Gammatron at Salisbury. The amp is dead silent and has fantastic bass and the sound stage is better than anything I have heard.
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IMG_2158.JPGNoyMark CS8412 + 8 x TDA1541A parallel battery powered nos dac project6183 viewsI built a few big power set tube amps with big triodes such GM70, 833. I wanted to do something different and completed my first diy nos battery powered DAC project. It use CS8412 as digital receiver and 8 X PHILIPS TDA1541A parallel as dac circuit. As buffer, i used two mono opamps OPA627. It uses no digital or analog filter. Sounding incredible natural (even one of my friend describing it as organic), warm and also detailed. Very silent background. I am very happy to do this equipment, otherwise i had to pay very big money for same sound. After charging the batteries, it works more than 10hours continuously. When i turn off the dac, it charges the batteries automatically. You can see other photos below:
http://stereomecmuasi.com/forum/viewtopic.php?f=46&t=965
http://stereomecmuasi.com/cihazlar/muziksayi3/noymarkdac.htm
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Pioneer-PAX-A20-_fullrange-speaker.jpgPioneer PAX-A20 fullrange driver - 2.8 cu. ft Bass Reflex Cabinet6181 viewsThe speaker cabinets are built using plans from commonsenseaudio.com I have been busy with the 2.8 cu ft cabinet that I bought from them, now about 95% done. French Polished the outside and need to wait a few more weeks for the shellac to set-up before I can give it a final rub down and buff. The sound is absolutely fantastic, with Pink Floyd being top of the pops when it comes to Big response...
The driver is a sing;e vintage Pioneer PAX-A20 full-range driver and it performs remarkably well still. Well that is to my ears and others seem to agree.
The cabinets are made from 18mm MDF and skinned with 4mm cherry-wood ply, corner quadrants from Red Beech and Horns from White Pine - Kahikatea for ease of machining. The cabinets weigh about 25Kg each and the wadding is just normal household wall insulation, but I did put a layer of speaker-cloth over it and stapled in place to look like a bit of duvet.
Keith (Christchurch, New Zealand)
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DIY-HiVi-Center-Channel.jpgDIY HiVi Center Channel Speaker6169 viewsDIY HiVi Center Channel Speaker using the HiVi F5 midbass driver and the HiVi SD1.1A tweeter. The crossover is 2nd order and at 4kHz.
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IMGP2958~0.JPGLME49810 with ThermalTrak NJL3281D/1302D output devices6158 viewsThis is a chip amplifier (chipamp) based on the National Semiconductor LME49810 high-performance, high fidelity audio power amplifier driver chip. The output stage is a conventional emitter following using ThermalTrak to achieve good thermal tracking.
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IMG_3232.JPGK-12G tube amplifier kit build6149 viewsPhoto of a S-5 Electronics K-12G tube amplifier kit which has been built into an old Kenwood solid state amplifier case.
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DIY-Acrylic-Platter-Turntable.jpg6123 viewsFor this DIY turntable I used 1-inch thick acrylic for the platter and plinth, a Pro-Ject tonearm, 2.5-inch machined aluminum legs and built opening glass top and base. The motor is suspended in aluminum case and is vibration free. I also built in a remote on-off so there are no wires showing anywhere.
Also see the video on YouTube - DIY Turntable Scott 299 amp
Ken V. - New York, USA ( this on YouTube @ DYI Turntable Scott 299 amp)
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PeerlessSeas2way~0.jpgPeerless and Seas 2-way Towers in Zebrawood6121 viewsThe fun part about building these speakers was the crossover design with a Zobel and Baffle Step Compensation (BSC). I wanted to try a larger driver than a 6.5 inches. I am really pleased with the sound and image. Unbelievable sound for the cost. The crossover uses open air inductors and Solen capacitors. The Veneer is Zebrawood adhesive backed. I was able to match the grain on both sides and the fronts. One coat stain and finish followed by paste wax. The speakers are drying in the garage awaiting the living room. Next is a pair of open baffle 3 way with active cross using DIY chip amps.
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The_SetUp.JPGLow noise mic preamp6108 viewsAfter preforming an on street recording of a classical busker with my Cowon mp3 in Florence I decided I wanted to do more recording. The Sony ECM-MS957 stereo mic (not made any more) had too low output to drive my mp3 player line-in or laptop digitizer so I made this low noise, two stage transistor (BC549) preamp (red lid). Because I used large 10uf polypropylene capacitors to ensure high quality sound recordings the preamp, though portable with internal batteries (12V), is quite large. Now I can use my mp3 player (128kps) to make quality recordings anywhere. There is no hiss or processing noise at all. The preamp is dead quiet. The preamp from the ESP site and is extremely easy to build. I use silver wire and silver solder throughout and gold connectors where possible. You can use 10uF electrolytic capacitors where I used polies but for the very best sound use the polyester capacitors. The designer suggests this in his text.
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DIY-HiVi-Home-Theatre-Speakers.jpgHiVi Home Theater Speakers6100 viewsDIY HiVi home theater speakers. See the project pages for full details.
- DIY 3-Way HiVi Tower Loudspeakers
- DIY HiVi Center Channel Speaker
- DIY HiVi SP10 Subwoofer Project
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DIY-Zigmahornet-Loudspeakers-Merrill-4_4-drivers.JPGZigmahornet Loudspeakers with Merrill 4.4 Fullrange Drivers6082 viewsThis was my first attempt at speaker building. They are Zigmahornet Speakers with Merrill 4.4 fullrange speakers instead of the Fostex FE103E. I chose black paint because it fit with the TV and TV stand/stereo cabinet that I have plus it hides my questionable workmanship. All in all, I really enjoyed making them and with the Merrill drivers they sound great with a surprising amount of bass from such a small driver.
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B2BO_ICEPower_1000ASP_modules_Par-Metal_Case.jpgB&O ICEPower 1000ASP modules6036 viewsThis is a high power audio amplifier project that I recently completed. The amplifier used two B&O ICEPower 1000ASP modules. Each amplifier module is rated at 1000 Watts. The two amplifier modules are housed in a Par-Metal aluminum case. The amplifier sounds amazing with my Epos ELS303 speakers.
See the other photographs.
Ed
Detroit, MI
USA
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MicroStudio.JPGDIY Mini Recording System6015 viewsBased around the Sony ECM-MS957 stereo microphone (discontinued) and Cowon i6 mp3 player, I built a quality mic preamp to complete this mini-recoding studio. All components are high quality and excellent recordings can be made with no other equipment required. The idea is to keep this portable but to retain quality of recordings. From microphone to digital transfer provides clean, crisp, noise free recording. All battery powered the system sits easily on a table top at your local jazz club to record the music and the vibes.
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Underside.JPGPartial Wiring Close up6000 viewsPoint to point wiring is a must in my opinion to achieve what you owe yourself , when it comes to turning the piece of art on . I just wish I could of shown my grandfathers what I have built. This shot shows some of the input stage power supply , Hexfreds , Precision resistors from PRP , and a snippet of the output power supply cap banks for the + / - DC rails that make up the 140 VDC supply.
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Fostex-FE127E-DIY-Bass-Reflex-Speaker-2.jpgFostex FE127E Vented Bookshelf Speaker5991 viewsPhotographs of the finished bookshelf speakers on a speaker stand. The enclosure is based on the Fostex FE127E Bass Reflex Bookshelf Speaker design by Rabbitz.
The enclosure is made from 15 mm MDF and is well braced. The woodworking and finishing of the speaker cabinets was done by a friend.
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AMPBOTOM.jpgS5 Electronics K-12M Tube Amp Kit - underside5983 viewsUnderside view of top plate. This tube amp is built from an S-5 Electronics K-12 Tube Amplifier Kit.
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DIY-Seas-Granite-Speakers.jpgGranite Speakers with Seas Drivers5966 viewsThese unique looking speakers are housed in a bass reflex enclosure constructed out of black granite. The enclosure size is 15L and tuned to 45 Hz. The drivers, G17REX/P woofer and Seas 27 TFFC tweeter are from Seas. The crossover is second order at 2500 Hz. See the project page: DIY Granite Loudspeakers with Seas Drivers for more information.
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DIY-5687-Tube-Preamplifier.jpgDIY 5687 Tube Preamplifier5935 viewsThis is my first DIY 5687 tube preamplifier. Sounds great for such a simple preamp. Front view.
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6SN7-6L6-Tube-Amp-4.jpg6SN7-6L6 Tube Amp Top View5931 viewsTop view 6SN7, 6L6 Tube Amp.
Link to the schematics for this tube amp: Williamson 6SN7 - 6L6 (KT66) Tube Amplifier
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NCDIYMeet042010b~0.jpgNorthern California DIY Audio meet Roseville, CA 04/24/20105926 viewsNice meeting with Sigfried Linkwitz guest speaker
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