The H.K is a 10 speaker system all ran off a amp in the boot.Is the HK sound system much better than the stock setup?
It was/is BMW's premium sound system and was classed as an up grade.
The standard system still runs an amp on the passenger side front speaker but i think its 6 speaker.
The additions are mids in the doors
and a subwoofer (or2 dependent on year)