yep a slight mod to this.
I use this amp coupled with the Colorfly C3 and it is an excellent combination.
Initially I got two, one for a gift.
It has no issues driving various older orthodynamics, though I did turn up the gain screws from what they were set stock.
Battery life is simply insane but see below
I got curious with this one after a year or two using it
, even though stock sound is
really enjoyable and good with the C3 combo ( C3 is slightly on the brighter side ) I went in and added 2 more batteries in parallel so it should be getting ~240 ish hours per charge now, easily double at least from before which was already in stock form over 100+ anyhow.
Bumping up the voltage slightly resulted in unfavourable issues, so it was kept stock voltage. I didn't feel like altering the original design much anyhow, it has to stay as an uber PA2V2 or it would not be the same in my mind.
Used the top notch Tenergy low self discharge brand, pretty sure it was the Tenergy Centura.
This meant I needed to put the thing into a new larger case. Settled on a Hammond black bodied rectangular thing with grey rubber edges, same thickness as stock more or less.
Since I was doing that anyhow I replaced the two filtering input caps with solid Sanyo OS-CON SEPC low ESR of the same values
http://diyparadise.com/oscon.html ( The SEPC Series is designed to have an even lower ESR than the SEP Series )
The two larger caps were replaced with ELNA TONEREX to bolden up the low end/ouput.
I could
barely get it all to fit but it did. ELNA were too tall to mount normally so they had to go sideways using some small gauge silver-plated kapton wire.
Wanted to change the led to orange but the square small orange tagged one turned out to be a hot reddish colour anyhow. Oh well.
Don't like shutting it off. Actually I probably don't need to now
