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RE: In spite of the potential advantages that a battery supplied phono preamp could have...

I believe the main advantage of battery power is in its cost savings. It often costs more to produce an AC power supply that performs as well or better than a battery power supply, especially for components that require very low power like phono stages and DACs. Small sealed lead-acid batteries are very economical. I significantly improved the performance of the original Audio Alchemy DAC-In-The-Box by replacing its wall-wart power supply with a sealed lead-acid battery. I suppose I could have built or purchased a higher performance AC power supply, but the battery was a lot cheaper and I used the wall-wart to charge the battery.

Best regards,
John Elison


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