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The first goal is the best sound possible, taking every advantage to get it.  Since the [crappy] [wall] power source is such a big factor in the sound we get from hi-fi, I could see designing line-level stages for use with batteries as a possible alternative.  In fact, I power my own (LV) DAC with a 17 Ah battery.  The success of such units should, of course, be measured against the best conventionally powered units.

I also vaguely thought about powering my K&K (phono stage) with batteries; but with something like 350V on the rails, it seems like a fool's errand.  You'd have to at least design the thing to get the unit's power requirements down to realistic levels before batteries would be practical, let alone sonically viable.

Yes, my own DAC sounds better on its battery than it does with good wall power.  But then, this unit was not optimized for good AC power to begin with.

Best regards,
Paul S

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