[V8] Bose Trouble

[Brian K. Ullrich]

Anyone got any experience working with these Bose speakers? Here's my
problem:

 

When I first bought the car and turned on the radio, I got very low and
intermittent volume coupled with a squeal. I could hear it from all the
speakers seemingly. I figured the head unit was bad because it seemed to be
attenuated by the volume knob. I assumed I had a bad head unit and purchased
another that arrived last night. When I plugged it in, I got a high-pitched
squeal coming from my right door speaker that seems to increase in frequency
range (low squeal going higher in defined "steps"). There is no other volume
in any other speaker. Thoughts?

 

Brian