The latest is Tony will send his Tact 2.0 and cables for us to take a look and hopefully the mystery will be resolved next week.
That's impressive customer service. I appreciate a manufacturer putting in the effort to chase down a nagging problem.
I had a ground fault problem with my TacT 2.2X which only manifested when I upgraded the PSU to a linear unit from Condor, modded by Aberdeen Components. For some reason we could never figure out, upgraded drop-in PSU boards which worked fine in the Aberdeen Lab made significant mechanical noise in my house, and would also trip GFCI outlets which themselves made disturbing grumbling noises with the PSU plugged in.
After three units I was ready to give up, but Anthony Padilla (Mr. Aberdeen) insisted on one more try and he solved the problem by leaving the stock caps in one position, insteading of upgrading to Vishays.
Anyway my point is that the TacT gear may in some circumstances leak current to ground, which makes me wonder if this is happening to Tony and affecting the Nuforce amp directly in a negative way, or interfering with the incoming audio signal.
I look forward to the analysis/solution of the problem, particularly since I am interested in trying the Nuforce Ref 9 with my TacT unit.