playing my music (cd) today in the car , giving it more than normal , bit of a dance number , since then my rear speakers don`t sound to happy at any volume (mostly with a strong beat) i have fiddled with the fader/balance and is deffo the rears . now what i need to know is this a commen problem ? (or am i unlucky/ daft) also can i use any other speakers ? (thats if there are knackerd . which i think they are) eg-kenwood , alpine etc . if not does anybody have a spare set for sale ? you can get me on - jonrose@barber45.freeserve.co.uk and i will buy them of you . cheers kids . hope you can help .