I'm definitely not ragging on you guys and the tubes. I grew up listening to a Heathkit tube amp my dad buit in the 60's, and it sounded sweet even through average speakers.

Nowadays, a single vacuum tube probably costs more than the whole solid-state receiver thingy I'm listening to music through.

I don't play guitar (often enough to matter ), but I've fixed an amp or two.

It's funny how things like guitar strings (tied down at each end) actually generate harmonics from oscillating at multiple frequencies, then pickups typically introduce more distortion, and then you get into a guitar amp with rectifiers generating 60 Hz and 120 Hz noise that barely gets filtered out...

It not a "pure" sound, just a sound we love. Kinda like putting sauces and ketchup all over some chef's pristine cuisine.

Anyway, I was wondering if any of you tube lovers had ever heard of people powering their amps directly from DC. Not 12V fed thru an inverter, but grabbing something like a Prius or Tesla battery and putting clean 200-300 VDC directly in where all that noisy transformer/rectifier voltage would go.

I recall one artist complaining about the noisy AC power at a local venue, and it just seemed like a big battery bank could easily power the amps for a 2-hour show without all the noise.