Follow the electrical code of your local municipal area.^^ This.
@jsautter
You gotta get with the program and go balanced!
But-
If you are concerned about ground loops, the thing to do is make sure that the equipment you use has competent grounding systems internally. Using your DVM measure from the ground of an RCA input to chassis; if you read less than 1 ohm ground loops are probable if the ground connection of the power cord is connected to the ground connection of the AC receptacle. So measure for continuity between chassis and the ground pin of the power cord.
If its not hooked up, seriously consider sending the gear back to the manufacturer for repair. This is the 21st century- people may have gotten away with that 40 years ago but its not acceptable now and oddly a bit too common in high end audio...
Also check between the ground of the output RCA; that should not be at chassis ground either.
Competent grounding of audio equipment isn’t that hard, despite the crazy amount of nuance that exists in this topic. IOW if your house AC wiring is done to code you **should** not have any problems; if you do its not the fault of the AC wiring.