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The amp I'm building is a Dynamid - the two Dynalo boards run off the S22 while the S25 powers the Arduino, status LEDs, current and temperature sensors and an LCD (at the front of the enclosure above, not visible).
It was originally just going to be a Dynalo in a lunch box but, like all my projects, it's suffered from serious scope creep! With the custom backplane PCBs (as opposed to point->point wiring), AMB supplies and a Goldpoint attenuator I'm hoping it'll go toe-to-toe with the Headamp GS-X in terms of sound quality.
Here's a (poor quality, sorry!) picture of the whole shebang - the front panels are done but the inside and rear panels of the amp itself aren't fully assembled yet. Power supply is on the bottom, which is what the above photos show the inside of.
I managed to get in on the new Dynahi Balanced board run, so I hope, eventually (sometime in the next century) to build something similar.