fixed
To be honest, I never change my gain or sub level once set. I just live with the fact that some songs are louder than others, simple as that. I also do not use a bass knob for the same reason.
Until Tony releases that neat little 1/2din VU meter you wont know when you've turned it up too much. So although turning the sub level/eq might help, you wont know when you've turned it up too much.