I am having a problem with my rear speakers in that they have far less volume than the front ones. The sound quality of the rear ones is much worse too but I suspect this is just poor quality speakers. A few months ago I had LarryM do his modification on the radio and I must confess I have not gotten around to replacing the speakers with the ones he recommended (I am hoping you read this and respond Larry as I forgot which speakers you recommended) but I think I still should get much more volume out of the back speakers than I am. Presently, in order to hear anything out of them I have to turn the fader almost all the way to the rear. When I first installed the rear speakers I had to make up my own plug to plug in under the seat and I had the four pins in the wrong configuration and had no sound but that has been sorted out. I am sure there are lots of folks who have messed around with speakers a lot more than me so I am all ears!!