Install A Dedicated AC Line at home

You want two, one for your main components and a separate for your amp.

Overkill if you understand electricity. Just be sure to wire the two circuits on the same AC buss. And choose the one without refrigeration, etc. 

2 grounds ,one common ground ,the other a insulated isolated ground on a separate Copper buzz Bar, amd a 2 inch  4 ft long ground 

@audioman58 

Bad choices. Adding additional ground rods can reduce the efficiency of the Earth which is there primarily for lightning strikes on the power lines. Unless it was engineered, you probably made things worse.

(FWIW, It beats me why anyone would install an IG receptacle in a house. )

To scare the bajeezus out of the missus so she doesn't plug in the vac or think 'A lamp would look nice over there'

These links are worth reading before wasting beacoup bux on 'special' wall sockets and silly wire gauges

Transmission Lines 

The Impact of Mains Impedance on Power Quality

The “Conduit Transformer” •

This finally explains what drives 99% of all ground loops! • Load current in line and neutral produces opposing magnetic fields since instantaneous current flow is in opposite directions • Imperfect cancellation magnetically induces voltage over the length of the nearby safety ground conductor • Strongly affected by geometry and proximity of wires • Highest voltages with randomly positioned wires in conduit • Lower voltages with uniform geometry of Romex® • Voltage is directly proportional to load current, wire length, and rate of change in current or ∆I/∆t • Mechanism favors high-frequency harmonics of 60 Hz • For constant current in L and N, induced voltage rises at 6 dB/octave

from An Overview of Audio System Grounding & Interfacing - Indy AES 2012 Seminar p31

Almost no home system requires more than 15A. A properly installed 15A can supply 20A continuously for about an hour. Other than class A, nothing draws anywhere near that much power.

It’s a bad idea to run multiple circuits for a HiFi, doubly dumb if they are not on the same leg. Earth Safety should be as close together as possible for minimum chance of ’ground’ issues.

On a 20A circuit w ≈700wpc [175wpc tube] and a voltmeter on the input never budges at any volume. Ditto on a ’scope.