For surge and lightning protection they are a good idea, but higher frequency noise is better removed by anti-ripple filters in the power supplies where capacitors and inductors become proportionally more effective with higher order Fourier harmonics for distorted 60 Hz wall outlet power up to radio frequencies which audio vacuum tubes cutoff.
Least Expensive Power Conditioner/Surge Protector That Won't Worsen Sound
I have an old Shunyata Hydra 6 that I'm sending off to Shunyata to repair. In the meantime, I'm curious - What's the least expensive power conditioner/surge protector that won't worsen the sound?
I've already discovered that plugging my integrated directly into the wall sounds the best. But I have source components. I have liked the Shunyata, but just in case they're not able to get it back to like new shape, what are your thoughts? (I tried numerous PLCs at the time I bought it almost 20 years ago and I thought it, by far, sounded better than any other one I auditioned in my system, and that included the Hydra 8).
I see many users who have reported worsening sound when using the Audioquest PQ2 and PQ3.
Something like a Panamax PM 5300 or 5400? Or the Furman Elite 15?
And what is the danger of under-voltage?