if i remember right read a thread on here hk doesnt take to well to after market speakers eitherI went into Halfords on Tuesday and they told me that if the car has Harmon Kardon (which mine does) then they have never been able to get hold of the correct adaptor to get a new head unit to work. Discos with HK apparently have seperate power amps making it more difficult. I'm hoping my local ICE place will not have any such problems.