I just recently purchased a 2005 S80 2.5T FWD

I have the HU-611 I believe. The base stereo cassette and CD

I initially thought that all of the front speakers were blown. The remedy was to fade all the sound to the rear and that still didn't sound that great but you can listen to the stereo.

When I shut the car off and just turn the key to pos II the stereo sounds awesome? when I start the car again the sound quickly reverts back to crackling blown speaker sound... fade to rear and it sounds fairly decent.. That's the problem I am experiencing

I have read on here that people were having trouble with AM or FM reception while the engine is running but for me this happens with everything AM/FM radio using the CD and a an aux adapter in Tape. Does not appear to be a signal problem more an electrical interference problem

I have googled and searched these forums and cant find anybody else with this problem. I am baffled?

 

Eliminating Engine Noise from Vehicle Stereo Speakers

Chances are it is a bad ground, test before replacing anything.

 

Thanks for nothing

Replaced the OEM with after market sounds awesome. Pulled a 2007 refurbished OEM out of 2005 car? Previous owner must have had it replaced.

Weird that two were junk?

Aftermarket with BT hands free is way better anyways...