Has anyone tried using a double UPS for clean power?

@mulveling 

Two houses ago, I had a lot of noise on my power and I lost a TV and a receiver during a storm.  I bought an Audience AR6.  It made a very noticeable difference in my system.  We moved from the city to the country into a new subdivision on what used to be an open field.  Everything was sounded great even without the power conditioner, but after a while, I put it back in because it had a magnetic circuit breaker. About seven years ago we moved back to the city, and near a four story medical building.  Most of the time my power seems fine, but every now and then my system sounded different, kind of thin. I put the AR6 back in and it made no difference. And once again, I left it in because of the magnetic circuit breaker.

@mulveling  I haven’t had coffee yet but isn’t that how all regeneration works. AC > DC > AC? So what's a "double UPS" the OP mentioned?

It’s a single UPS unit designed to internally convert the wall AC to DC, and then from DC back to AC (hence the "double conversion"),

GOLDENMATE 2000VA/1600W Lithium UPS Battery Backup and Surge Protector, Backup Battery Power Supply with LiFePO4 Batteries, AVR, Online Double Conversion Uninterruptible Power Supply, Pure Sine Wave https://a.co/d/iWWUKe6
 

 https://a.co/d/9ZoPTJ8

Don’t know why the hyperlink didn’t come through on my previous post, but this is one of several examples being sold on Amazon. APC sells them as well.

This is part of the description of this unit.

• [Professional Online Double Conversion UPS]: The 2000VA/1600W Pure Sine Wave Online UPS ensures uninterrupted operation with zero transfer time (0ms) power switching, safeguarding mission-critical systems from outages and voltage drops. Its dual-conversion design delivers clean, stable power, fully isolating connected equipment from utility disturbances. Featuring Automatic Voltage Regulation (AVR) and intelligent battery monitoring, it optimizes performance and extends system reliability. Ideal for offices, healthcare, retail, industrial, and government applications, this UPS provides seamless, dependable backup power to keep your essential operations running without interruption.