DMCS414, where are you in the DFW area? If you would like to test out a couple of cheap USB DACs, I've got a Pico DAC only and a Monica USB.
I also have an Audio-gd NFB3 that's my prime DAC now. If I ever get off my butt and order a couple parts, I've got most of a pair of Bantams
ready to go as well.
This is what I did.
Disclaimer - I am a DIY stat amp n00b. So take what I say here with the proverbial grain
(or 50 pound sack) of salt. I will not be held responsible if you blow up your amp or headphones.
I know that I am preaching to the choir here, but all the regular B.S. about following safe build
and test procedures without electrocuting yourself apply here too.
1) The psu is to be burned-in for eight hours at 125% of rated power output.
[with a dummy load attached - simulating the load of both amp boards]
After burn-in, ensure that both the high voltage and low voltage +/- r