Single line Isolation Transformer.

I have a dedicated 10 awg 4 strand timex line from the fuse box to my HT setup via a hospital grade leviton outlet to a Belkin Pure AV PF60. That runs everything except my mains amp at the front of the room, the TV and the Sub Amp. I'll be adding two more outlets for those items.

My questions is: can I add one Isolation Transformer or something else where the main romex 10 awg line drops into the theater closet to isolate it from the rest of the house. I'm trying for a lower better noise floor.

My budget for this isolations transformer or other recommended item would be $300.00

Thanks.

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