The system starts with a P10. All electronics are plugged into the P10. The P10 is plugged into a dedicated 15 amp breaker. In the elimination process should I start with the P10 out of the system? I thought I understood the ground loop trouble shooting process, but when the hum was still present with shorting plugs in the input jacks of the phono preamp, it seemed like I had found the culprit. Now it is difficult to know where to start.
System is as follows: P10; cj: ET5 line preamp, TEA2MAX phono preamp, ARTsa amp; VPI Prime (Phoenix Engineering Eagle PSU - not plugged into P10); Technics SL1200GAE - plugged into P10); Sony: HAP-Z1ES Audio Player, XA777ES SACD; McIntosh MR78 tuner. All cables including interconnects and power chords are Audio Sensibility Statement Series.
Thanks in advance for any help you can provide.