.....appaling .. sounded like every speaker had blown , changed head unit no better .. as i was looking for the sub in the cubby box i noticed the rear panel in front of the rear speaker was adrift , so i pulled it off and some one had replaced the orig rear's with a small jvc speaker with tweeter mounted in centre .. then they had screwed the orig speaker housing on top !! effectively stopping the speaker doing its job ( moving in/out ) .so i removed the said cover mounted them with new screw holes .. much better but still not brill , checked the wiring and it was wired incorrctly as well switched them round and he presto both sound sweet now . next job is front door ??