I recently got a Music Man Passive USA sub and it sounds really nice, however one of the knobs was not affecting the tone. I opened the cavity and saw one of the pots was not wired into the circuit at all, just had a capacitor on it. I just wanted to clarify, is that is what its supposed to be like? or if it was a modification or factory mistake? I was under the impression this passive version had a volume, bass cut, treb cut. I already message their customer support but im hoping i might get some quicker responses here. Anybody with an unmodified passive setup want to send a picture? Or just anybody with any information really... haha thanks in advance.