e36 harmon kardon upgrade
first of all apologies if this has already been covered been looking up everywhere but cannot find the answer.
car is a 98 bmw m3 evolution convertible. problem is ive changed the standard headunit to a pioneer but im getting no sound (the stereo does come on).the car has a harmon kardon set up, ive tried the stereo in another car and it works fine. someone mentioned that the car has an amplifier and thats causing the problem, any ideas? thanks