I have my Gryphon Colosseum running into an AudioQuest Niagara 5000 and I’m happy with how it sounds. I hope it gives my gear some protection from lightning strikes. When I’m home, I still unplug everything when the weather app on my iPhone says there was a lightning strike nearby. Thank goodness for weather radar systems.
I had a Tesla Powerwall installed in my mom’s house as a battery backup system. About $8k. She loses power out in the suburbs quite regularly when a power line goes down somewhere. One battery can give two days of power, depending on draw.
You can’t put the battery in a living space and it weighs about 500lbs, if I recall correctly. It can go outside. I suppose it would be cool to have it power a stereo and with a couple of batteries and solar, you could live off grid.