A wire between the inside and the outside of the RCA input jack. Fold the wire end going inside over and push it in no further then the inside plug length of the the cable you use. Even better if you have an old cable you don’t use where you can snip off one end strip the wires close to the plug and tie them together. Not as good but easy and not as destructive , is to plug in a short cable (shorter the better, especially if unshielded) and short the other end.
The reason for doing this is only to make sure that the input is not floating. I suspect it won’t change anything but it eliminates that question. After that if you’d need to be comfortable removing the amp to look further.
Last edited by rrlev; 12/16/21 02:46 PM.
