The M³ Stereo Headphone Amplifier
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M³ Gallery - Page 1

Here is an area showcasing M³ amplifiers from people like you! The unusual, the exotic, even the mundane... As long as you like what you built, then why not show it off? To have your M³ featured here, contact AMB.

New photos are added often, so come back to see the creative work of the M³ builders community. Have fun!

Click on any image to see a larger version.

Quick jump: AMB | rjkdivin | MisterX | steinchen | skyskraper | phobus
pabbi | tkam | meat01 | steel | ylshieh | GregVDS
98venom | auuc | darkisz | cook | dennis | ntrl
Gilor | NeilR | i-feng | bdb | Ferrari | David_Wei
set300b | fordgtlover | threEchelon | rille | naamanf | Stixx
hardnrg

AMB's M³

Here are some pictures of AMB's own M³ prototype, wrapped in a custom home-built case. The styling and construction follows the same theme as AMB's modified SDS Labs MOSFET amplifier, the "β18". The circuit board is a pre-production version with no solder mask or silkscreen. This amp has AD8610AR opamps, Vishay-Dale RN55D resistors, Vishay-Roederstein MKT1817 for C2 and C8, Wima MKP2 for C6 and Cbb, and Nichicon HE electrolytics. The MOSFETs are biased to 85mA per channel. A companion STEPS 27V regulated DC supply is used to power this amplifier.


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Three M³s by rjkdivin

Here are three M³ amplifiers built by rjkdivin. This first one, and a companion Tangent STEPS power supply, are each housed in a black Silverstone LC01 Nano-ITX computer case. Custom rear panels were fabricated to replace the originals, which came with cutouts for computer connections. The second one has the M³ amplifier and STEPS PSU board both mounted in a Par-Metal 20-series 12"x8"x2.5" case. The third one has separate Par-Metal 20-series 6"x8"x2.5" cases for the amplifier and PSU, this one uses a Welborne Labs PS1 power supply.


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MisterX's M³

MisterX built this stylish M³ in a ATI 645T case, shortened to the desired size. This amplifier features a DaCT CT2 stepped attenuator volume control, Elna Cerfine electrolytic capacitors, AD8065 opamps, and a Condor Power-One PSU at 24V.


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M³ by steinchen

This M³, built by steinchen, is housed in an enclosure from Segor Electronics (part number 001.07.L.SW), with a custom front panel made by Front Panel Express. Two headphone jacks are installed, one for standard headphones, and one specifically for the AKG K1000. Vishay-Dale RN55 resistors are used in most locations as well as Wima film capacitors.


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Skyskraper's M³

Skyskraper built his M³ in an Altronics 19" 2U rack-mount case in raw aluminum finish. The amplifier is powered by a Tangent TREAD board and a 30VA toroidal transformer. An input selector switch allows a choice of multiple inputs and jack types, a DC output jack provides power to external devices, and the front panel has jacks for two pairs of headphones.


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"Lunchbox" M³ by phobus

This unique M³ from phobus runs a voltage gain of 5.5, has OPA637BPs for the left and right channels, OPA627AP on the ground channel, Vishay-Dale RN55E resistors, Vishay-BC MKT370 for C2 and C8, Wima MKP2s for C6 and Cbb, and Panasonic FM electrolytics. The MOSFETs are biased to 108mA per channel, and the amp is powered by a Velleman K1823 PSU at 24V.


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