[paltomare]

Originally Posted by prepress

I think you are as well. There is another voltage regulator that Tripplite makes, which is much more basic should you decide on a regulator. It doesn't do as much as the Furman, but it covers the basics. I had one for a while, and it served me well. And it costs much less than the Furman, less than $400 in most places. https://www.tripplite.com/2400w-120v...utlets~LCR2400

Tripplite also makes isolation transformers, the top model of which is $600–$700, depending on where you get it.
https://www.tripplite.com/main/searc...lator%20series

I found my problem, I'm an idiot....I've been focused on fixing power to the amp and realized today that I did not connect the Schiit Preamp and DAC to UPS I just bought. This UPS uses double conversion topology which always provides power from the battery to its output. I could not understand why I was still getting this hum when the A/C kicked on. I was preparing to send the UPS back and noticed the Pre and DAC were only connected to a separate power conditioner I have. Once I connected them to the UPS the brief hum disappeared. It seems my problem is solved, thanks so much for helping me sort this out.