Hi dear volvofriends, I have a small problem. My center speaker in the middle of the armature board is very bassy i.e. when I activate the pro logic function in my radio it “shrinks” extremely. Do you have to turn it off immediately because it sounds so bad! If I can reduce the bass controller to a minimum. But is not the point of the matter. For me it sounds defective. Is this normal or do I have to change the speaker? If it does have which speakers and what does it cost and can possibly have someone instructed how to change it? Have the c70 not so long yet, therefore I have no experience with the installed system. Would I be very happy about any information!