First, thanks to those who took the time to respond!
To be blunt, I’m skeptical of any system that’s sensitive to minute differences in cables, assuming they are low enough resistance to realize the full potential of the amps (speaker cables, power cords), or of decent quality (interconnects) to get the signal to them. This is a sign that something’s wrong, such as improper grounding, impedance too low at the destination, impedance too high at the source, inadequate shielding, bad connectors, etc.
A legitimate double blind test (adequate sample size, controlled environment, only one change per iteration, multiple sessions) is the only way to prove a repeatable difference.
If I choose to build some battery powered Cherry Amps, I want to hear them myself first. I want to measure them as well. I don’t believe tremendous available current is necessary. It’s not as simple as just hooking up batteries, in the case there’s no DC/DC between them and the amp, but not rocket science either. Anyway, I’m still wondering if it’s worth the trouble because the Maraschino, for example, is a very high performance amp as-is, and we’ve tested (including lots of listening, of course) with several different power supplies already. So, if only 2 people will ever buy a battery based power supply, it doesn’t make sense to spend the time/money to develop what will be yet another option, thus complicating the product line. We went through something similar with a linear power supply for Maraschino amps. We sold a few, but interest was light, and it wound up fading away. It was a good power supply, and super heavy for its size, but resulted in lower power output. Other specifications were the same, and so was the sound, except when large peaks while driving difficult speakers (Mags) were too much to handle. Meanwhile our standard 60V 1kW switching supply powered though the same tracks without a sweat!