Had the gain set to a little more than half, subsonic filter between 25 & 30 hz, bass boost on head unit was at 1 out of 5, bass knob was like half way up (maybe a little more). So from what you are saying, more than likely my settings are way off. Maybe I should also tune lower? An upgrade to a bigger amp for louder bass? Maybe even think of a sealed enclosure for daily. would a box tuning of 25hz sound decent?