Speedskater

All modern XLR balanced interconnect systems are: low output impedance to high input impedance 600 Ohm systems are from the 1960's or earlier. There should be no signal level lose with most splitters.

Also get an AC monitoring like the "Kill-a-Watt' for one example. The AC line voltage at your audio components should only drop a volt or three under very heavy load.

With US bottom shelf back-stab dual receptacles. The back-stab can only be 14AWG solid wire. But the side screws can use 12 or 14AWG stranded or solid wire. * * * * * * * * * * * always use top shelf industrial/commercial receptacles. or 'Hospital Grade' receptacles. You pay a lot more for features that you don't need, but you know that it's top shelf. * * * * * * * * * * * there are no internal differences between top shelf 15 & 20 Amp receptacles. The only difference is the plastic cover plate that permits 20 Amp plugs to be inserted.

Get a laser 'Infrared Thermometer'. Check the temperature of the breaker after it's been delivering a heavy load for a while. If the breaker is bad it will be real hot. Decades ago at work, the insurance co. would sent a man with an infrared camera (they were expensive then) to check all the breakers in our big building.

Is ht-bypass, Home Theater bypass? How many output channels does that unit have?

The 53 Ohms has nothing to do with the transformer. It's what a 1000VA load's impedance is. (230 Volt line) * * * * * * * * * * * * A power transformer has two limitations: Short term - core saturation Long term - heat an Equitech is a great transformer. That 1000VA is a very conservative rating.

Wait....... on a 230 Volt line a 1000VA load has an impedance of 53 Ohms.

an AC power line should have a 'source impedance' of well under 1 Ohm at the wall outlet. an Equitech 1RQ (1000VA) Isolation transformer secondary won't be much higher. There won't be much difference in 'source impedance' between an existing circuit and a dedicated circuit.

I'm Late. If both 13AWG cables are connected to the same pair of terminals at both ends (not bi-wired) then that's 10AWG equivalent not 8AWG. So the resistance is half of one 13AWG cable, the inductance is also half, but the capacitance is double. High to total capacitance is only a problem with a few Legacy and Boutique amplifiers.

Only one user on a power company transformer is probably a good thing. But mostly it doesn't matter. Power line distortion is not a problem for well designed audio components. But noise pulses can be a problem. a"Kill-a-Watt" meter (or similar) id much better for measuring power lines than a DMM.

Make that twice the resistance! Not such a good thing.

While there is nothing to be gained by bi-wiring, But the '+' & '-' of any conductors of any signal should be very close to each other.

Blind listening is seldom enjoyable. But do you want your preferences to be based on the sound of a product or on things like brand names, price tags, bling, advertised suggestions, perception of luxury, etc.

Note that any capacitor connected to an AC power line needed to be a Class 'X' or 'Y' capacitor. (X or Y depending on placement).

At 4 meters and longer, Blue Jeans Cable is at the top of the list. But there are other coax contenders. Any coax with a heavy braided shield would be great. Like Canare LV-77S, Belden 1505F & Belden 1695A .