Originally Posted by OldGuy

I'm noticing the back speakers in my car may not have sound coming from them. When I adjust the fade to 100% rear, there is nothing. If I am correct and there is no defect in my car, I ask if the rear speaker holes are pre-wired to accommodate new speakers? Would two speakers in the back improve the "surround characteristic" of the sound in the car? The quality, itself, is already acceptable. I see the two front speakers on the doors and two in the corners of the dash. I'm not an audio person. Can someone clarify?