I have noticed a loud distortion and noise when using my turntable. I have a Rega P2. This noise occurs at random or when the tonearm cable is moved. There was some bare wire in the tonearm cable close to the RCA jacks. The exposed wire was covered up with tape and the cable was checked and no more bare wires were seen but the issue persists. My phono preamp is a lehmann black cube. My question is should I rewire the tonearm or is this a phono preamp issue? My amp is a NAD c325.