Surge protector

Hi OP: I meant to say that I use a Trip Lite everywhere except my PC because I have an Uninterruptable Power Supply.

@erik_squires & all

1. Most of power strips with surge protection under Trip Lite, Furman brands referred here has EMI/RFI filters built in. If one wants to protect the amplifiers without adverse impact from the filters, what brand / model do you recommend?

2. Based on my knowledge, all the UPS in the markets disregard the types (standby, online, line-interactive) have AC->DC and DC->AC double conversions which gives you 'dirty' power supply.  Aren't you concerned at all getting the poor quality power supply by plugging your hi-fi gears into it, I wonder?  Is there audiophile grade UPS out there?

OP:

I’m sorry to ask, but any chance you could get a plug in AC tester like this one from Kaiweets or this one from Klein? Something is very wonky.  Test your outlet and test the resulting V at the Furman as well.

Of course, if you have a multimeter and know how to use it you should, but these will test the hot, neutral and the Kaiweets will even measure the N to G voltage.

PS - Those are direct links, not associate links.

@lanx0003

1 - There are EMI/RFI filters, and wave shaping filters. The first aren’t doing anything below 100 kHz and are in parallel, the latter aren’t doing anything below 3 kHz, which is well above the 50 or 60Hz line frequency. I really don’t understand why people think that the power pole is cleaner than the power they have at their outlet, it often is not. The last thing I want is a super conductor between my amp and the power pole, which is what seems to be the target for audiophiles. I want resistance. I want inductance. Enough at least to reduce noise transmission and ensure surge protectors have time to work.

In order of preference, Furman and Tripp Lite, but please do take a look at the Wirecutter article as the brand AND model matters. Furman without SMP/LiFT is just another power strip.

2 - Well, the type matters because it’s not always on. I use these strictly for my PC, Internet access devices and CPAP. The PS Audio units are essentially the same idea, with Class D outputs (and noise) and very short run time. 🤣 There are UPS with sine wave outputs which are still a lot cheaper than the PS Audio units, but for whatever reason, the sine wave units tend to have a higher failure rate than the stepped voltage output units.