Battery-Powered Audio System Buzzing?

@immatthewj After A/B-ing with the upstairs system (Schiit Tyrs/Tekton Encores) I've come to the conclusion that while there is a difference between battery and wall power, it is very slight. One is not better than the other. Not worth the annoyance of dealing with the batteries. I will A/B more extensively with the downstairs system (Schiit Aegir/Tekton Impacts) and report back. It was on that system that I originally noticed the big difference I described above. We'll see if that holds under more scrutiny.

@goldenways I definitely don't want to harm my equipment. I'll reach out to the manufacturers of all my gear and see what they think about powering their stuff with batteries.

Sounds like a good plan. My guess is the manufactures are not going to stake their reputation on batteries. They will stick with the tried and true way that is normally done. Even if they say go for it, most likely there will be a large asterisk to the statement. My asterisk to my opinion “I might be wrong”

Sounds like a good plan. My guess is the manufactures are not going to stake their reputation on batteries. They will stick with the tried and true way that is normally done. Even if they say go for it, most likely there will be a large asterisk to the statement. My asterisk to my opinion. “I might be wrong”

@goldenways

Strictly, the OP is not using batteries to directly feed his equipment.  He is using an inverter to convert the battery DC to mains-like AC.  Almost certainly the inverter will contain a switched mode power supply, especially as it is a "pure sine-wave" inverter.

I have a set up like this in my motorhome.  Interestingly the 2000-Watt sine-wave inverter I use will synchronize to mains frequency within a couple of cycles if mains is connected.

My lithium batteries are nominally 12-Volt but the actual voltage ranges anywhere from 14.7 if the sun is shining on my solar panels to about 11 just before the batteries shut themselves down.  I hate to think how many switched mode power supplies are used inside my components to deliver the various voltages actually needed!