DIY Audio Projects Photo Gallery
 NEW    Bruce Heran outlines the details and construction of his simple DIY 6DJ8 (ECC88) Tube Hi-Fi Headphone Amplifier Project.

DIY Audio Projects Photo Gallery


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Vacuum Tube (Valve) Audio Projects


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DIY Vacuum Tube (valve) Projects such as Tube Amplifiers and Tube Preamplifiers.

233 files, last one added on Dec 20, 2015
Album viewed 20 times

Speaker and Subwoofer Projects


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A photo gallery to show off your DIY Loudspeaker and Subwoofer projects and kits.

135 files, last one added on Sep 25, 2014
Album viewed 22 times

Chipamp, Gainclone, T-Amp and Op-amp Projects


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DIY audio projects that are based around a single integrated semiconductor chip or an opamp like Gainclone, Chipamp or T-Amp projects.

74 files, last one added on Dec 15, 2014
Album viewed 11 times

Solid State Audio Projects


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DIY Audio Projects that are based around discrete (solid state) components, such as transistors, MOSFETS, J-FETS ...

57 files, last one added on Dec 20, 2015
Album viewed 11 times

Audio Cable Projects


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DIY Audio Cable Projects - Interconnect (RCA) Cables, Speaker Cables and Power (mains) Cables.

11 files, last one added on May 19, 2009
Album viewed 5 times

Other DIY Audio Projects


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Photographs of DIY Audio Projects that do not fall into any of the previous categories such as DIY turntables, power supplies, pictures of your listening room setup ....

19 files, last one added on Jun 16, 2013
Album viewed 15 times

S-5 Electronics Tube Amplifier Kits


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A photo gallery of the various inexpensive Tube Amplifier Kits from S-5 Electronics that have been built by DIYers. The kits include the K-8LS, K-12, K-16 and the similar K-502.

51 files, last one added on Sep 03, 2013
Album viewed 11 times

Commercial Hi-Fi Audio


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Photos of Commercial Hi-Fi Audio Gear, Components and Products.

33 files, last one added on May 15, 2012
Album viewed 5 times

8 albums on 1 page(s)

Random files - DIY Audio Projects
LM3875-Gainclone-Chip-Amp-TR.JPG
LM3875-Gainclone-Chip-Amp-TR.JPGLM3875 Gainclone / Chip Amp with Baking Pan Enclosure4106 viewsThis LM3875 Gainclone was built following the basic idea around the LM3875 Gainclone in a Roasting Pan. The power transformer is from an old Yamaha subwoofer that stopped working. The power supply consists of four 6800 uF and two 4700 uF capacitors.
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TeaBoxII.JPGTea Box 12AX7 Valve Preamp II2482 viewsSee the previous photo for more detail. In this image you can see the solid brass cones, 4oz brass knob and another view of the preamp. The SMPS is contained inside making one very neat and attractive looking valve preamp. Golden Dragons replace standard 12AX7 valves.
Jan6418JewelBoxInside.jpg
Jan6418JewelBoxInside.jpgInside the sub-mini Jewelery box preamp2406 viewsI have a weakness for "cute" enclosures, particularly timber ones. The mirror is just a bonus. The circuit board is part of a kit from Oatley Electronics Australia. I have replaced the carbon resistors in the kit with metal film, the 0.1uF MKT caps with 0.47uF polypropylene types, the 220uF electrolytic caps (output) with 470uF low ESR types. Also the PT2308 headphone driver chip was replaced with a Burr-Brown OPA2134 OP amp chip. 2 X 9V lithium batteries provide 9V to a L4949 regulator which controls filament current to the Raytheon JAN6418 sub-mini valves. Attenuation is trim set and volume controlled by external devices.

Three grommets are used as valve dampeners. These tiny valves can be extremely microphonic. Three grommets stops the microphonic problems dead! The amp is extremely quiet. See the JAN6418 Valve (Tube) Preamplifier Kit page for full details.
Philips_EL6431_Amplifier.jpg
Philips_EL6431_Amplifier.jpgPhilips EL6431 Amplifier2030 viewsClose up photo a vintage Philips vacuum tube amplifier which I rebuilt. The Philips EL6431 uses four EL34/6CA7 tubes to obtain an output power of around 120 watts into an 8 ohm speaker.

For more information and photographs about my Philips EL6431 amplifier rebuild see the 120 watt Philips EL6431 Tube Amp forum thread.

Alan (Canada)

Last additions - DIY Audio Projects
4-channel-400W-amplifier.jpg
4-channel-400W-amplifier.jpg 4 channel, 400 W amplifier769 viewsThis 4-channel 400 W amplifier uses Hypex UcD400HG modules together with the corresponding power supply.
The whole is mounted inside a Galaxy 330 x 230 x 80 case.
For building instructions, have a look at this project's wiki.
Two such amplifiers has been working for over 2 years in my lounge, driving Linn Komponent 110 loudspeakers which each have 4 speaker inputs.

Francois Corthay - Switzerland

Project Page: 4 channel 400 W amplifier using Hypex UcD400HG modules
Dec 20, 2015
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E88CC-SV83-SET-Amplifiers.jpgDual SV83 SET Amplifiers730 viewsA mirrored pair of SET amplifiers, presently being used in bridged mode. All P2P construction using silver solder. I included a "Hazen grid" capacitor and input tube bias change switch. The single mA meter displays individual output tube bias current with a Left/Right switch. Edcor XPRW178 power transformer and GXSE10-6-8K output transformers. Upgraded caps to Jantzen Audio 1200V Z-Superior. Upgraded resistors to PRP PR9372 Audio for metal film and TAKMAN REX for carbon film. ALPS Blue 100K attenuator. The power supply uses a RCA 5U4GB rectifier and Hammond 156R choke. Matched pairs of Svetlana SV83 for power and JJ E88CC for the input tube.

Billy Whiten - Georgia, USA
Dec 20, 2015
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6V6-Push-Pull-Amplifier.jpgPush-Pull (PP) 6V6GT Tube Amplifier636 viewsThis 6V6 amp was built following the DIY Push-Pull (PP) 6V6 / 6V6GT Tube Amplifier Schematic. Power Supply transformer and Output transformers are handmade in Argentina by NavasBaccino. I'd like to thank Brad S. for the help. The sound is amazing and clear, free of distortion.

Gabriel Rofrano, ARGENTINA

Video link

Dec 20, 2015
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Decware-inspired-EL84-amp.jpgDecware inspired EL84 amp with attenuation659 viewsThis is a Decware inspired EL84 power amp with attenuation. My twist was to make a it a EL84 SE UL (not triode). Also I upgraded the PS a little. One PS tweak was to use a Russian PIO 4uf cap as the first cap in the PS. Also the larger electros are all snubbed.

The inter-stage caps are Audio Note Tin foil, mylar and oil. The amp I called "Tamarisk" - just like how it sounds. The finished amp looks good and not too heavy. Sound is a big step up from my already great sounding 6V6 - Ozzie tube SE UL amp. On live classical every part of the music has a layer. There every instrument is heard in its own layer and decay, reveb etc also have their own layers.

Mark Houston – retro-thermionic

Forum Thread: http://diyaudioprojects.com/Forum/viewtopic.php?f=9&t=5385
Nov 19, 2015


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