What breaks most commonly on subs?

[Shadow7874 10+ year member]

i think people need to learn that the gain is not a volume knob.

i dont think ive ever had my gain above 3 of the 10 or so tick marks on the knob. but i normally have the bass boost up on the knob. but i think on mine the bass knob in the car can only lower it, because unplugging it sounds the same as having it plugged in on max, but with the knob i can go lower. if that makes sense