So I have a Metroamp JTM 45 that I built and installed his PPIMV. Now the controls squeal. The wire he sent is 2 wire with a ground wire. I hooked it up and it works but I think the wires are too close to the preamp circuit, I used the lower input on channel 2 for the pot. Do I need to move the pot or can I use different wire with shielding and ground the shields.