I tried using 2 x 12v lead acid 6Ah batteries in an ECC88 tube head amp (MC phono amp). It was quiet but sounded significantly worse with loss of air and dynamics. Reconnecting internal 24Vdc regulated solid state supply brought it back to life (but with a trace of mains ripple noise).
Dc for power supply
Anyone use 12v or 24v car battery as dc power supply for home audio. Or even for filament on tubes. I like to know if any members try different types of battery. Lithium, Lead Acid, NiMH, Agm, Gel etc... Can you tell me if it makes a huge differences on each type of battery. I like to use it to run my dc filament on a cd player. Please advise??