will
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In my setup, less about noise, the voltage was the bigger issue sound quality-wise. It varied as much as several volts at different times, but was almost always higher than 120 here. And relatively consistant wherever it happened to be for a period of hours, I heard it. With my Torii MKIV, once recognized, it is quite noticeable, a denser/thicker, darker sound when the voltage is higher, and leaner, more open/cleaner sound when it is lower. So, for fine tuning the system in any way, I had a moving baseline, usually between 121 and 124v.
For this reason, I changed from my PI Audio Uber conditioner to a demo PS Audio P5 regenerator, the regen doing it all.... protect, filter and stabilize voltage. I can't say I recommend it unequivocally, as for me, I had to do a fair bit of work to get it as transparent as I prefer, building a special, very quiet and transparent power cord for it the biggest improvement. Once there, I like it pretty well, and am very glad to have the voltage regulation.
Also, the many settings the P5 offers for tuning to tastes are really useful... voltage, phase, and mode (low distortion or high regulation) most important for my preferences.
And unlike me, many like the P5 out of the box, though many others upgraded to the P10 for better sound. Don't know about the P3 sound. I did not look into it because, if I recall correctly, it only filters the high current outlet without regeneration/voltage regulation there.
If you have a digital multimeter you can measure voltage at an audio outlet periodically to see, and if it moves around, see if voltage is a sound issue for you. With my P5, I typically like it best set at 118v, giving big enough, but more open and natural sound for me.
My P5 typically says I am using only around 170 watts with my Torii, CSP3, and a few incidental small items. It is rated for up to 1000 watts continuous output. I filter my front end separately with a little more transparent setup.
Since I got the P5, on occasion I have noticed some talk about smaller, less costly regenerators that I suppose may be enough depending on the system. I can't recall the company, but may be worth a little research if interested.
And if voltage variation is not a sound issue, it would seem a nice conditioner with surge protection could be a good option. Many folks claim good conditioners sound better than a regenerator. But as said previously, a used regenerator could be a good and relatively reasonable solution to your funky building power. There is a nice comfort in knowing all bases are covered no matter where we move our systems.
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