Try and check on 'ground loop isolator' on Amazon. A friend of mine purchased a simple system and it had the annoying '60 hz buzz' and we installed this product, the TII ground loop isolator. It stopped the buzz. Good luck!
Try and check on 'ground loop isolator' on Amazon. A friend of mine purchased a simple system and it had the annoying '60 hz buzz' and we installed this product, the TII ground loop isolator. It stopped the buzz. Good luck!