Thank you for your response.
I’m wanting to ground my pre amp only. I power it from battery/inverter and ground it from the wall plug. The ground from the wall plug introduces noise which negates much of the benefits of the battery power.
I’m thinking perhaps the GroundMaster City would solve that issue for me. I have long wondered how to filter ground noise.
I’d be very interested to hear how well the GroundMaster City reduces noise on the ground line.
Regards