Hello mates. Got in my car last night and noticed something was not sounding right with the bass. Those of you that have HK know the deep bass the system has and last night it sounded off. Changed the balance to the rear speakers and almost no deep bass but rather dry. The front speakers are fine. Anybody have this happen before? What should I look for? Fuse? Amp? Speakers? Or could it be cause it was very very cold last night?