Stingray makes horrible squealing, screeching noise after 10 – 15 minutes
This can be deleted …I think I have discovered the problem. The solder on the earth/negative terminal on the battery compartment has completely oxidized and fallen off, so the black wire is no longer connected. I think its an earthing issue, sorry for wasting your time.
Hi,
I have a Music Man StingRay Bass that I bought about six years ago. It has started making a screeching noise after about 10 – 15 minutes of being plugged in. I have no control over the noise, it doesn’t matter…
Read more
Source: http://forums.ernieball.com