This is an old school DIY amp, it has nice parts and uses an Alps blue pot. The power supply uses a DC wall wart with an internal Tangent Tread voltage regulator to keep a steady voltage. I can't recall what I set it to but somewhere around 26v DC. I'm not the original builder but I debugged this thing when I originally bought, cleaned up the wiring and got it functional. I cant recall who built it.

The condition has some nicks here and there but the amp itself is functional, the chassis was originally laid out for a combination with an amb gamma dac but it never really happened. The switches in the front are not hooked up to anything and the backplate has holes for dac board that is not installed. The lone front panel power led is amber.

I will include the gamma dac parts with the amp.

Opamps installed:
Ad825 in L and R
49710ha in Ground

Please be aware this is an old as hell diy amp, it works and has never blown up my headphones, but I am just a hobbyist tinkerer so it is sold as is. I checked and properly set the bias just a few months ago. I can leave this thing on all day with no problem.

Use wayback machine to lookup Tngentsoft website for more info.

Asking $70 shipped, that basically breaks down to 50 for the amp and 20 for the shipping.

I would really like an old portable pico dac/amp if you happen to have one to trade.