Wondering if anyone can recommend a car audio expert who knows/fixes older high-end stereo equipment. I have an original Alpine CM5908 with a Cantaloupe Radio Bluetooth conversion setup on my E30, but the rear speakers are full of buzz and distortion. Take away the bass, the buzz lessons, but then sounds like a tin can. I believe this is either a speaker or wiring issue. I've tried to keep everything on this vehicle as stock as possible, so I'm not looking to "upgrade" to anything new. I just had a complete overhaul of the mechanicals and now I just want to have some great tunes along for the ride. Any pointers would be greatly appreciated. Thanks in advance. _Adam