Thanks alot on the info. Any tips on how to tune amps correctly? im kinda new at car audio but not a total dumbass lol.

gain: set this to your head units pre-amp voltage. usually 2 or 4 volts
lpf: 80hz is the standard setting
subsonic: a few hz below whatever the boxes port is tuned to.
bass frequency: i'll be honest and just say i'm not sure how to set that. its a frequency based bass boost is all i know. burn a test tone cd and mess with this setting because i can't give you a very accurate setting for this. start it at like 40hz setting is about all i got.
bass boost: leave it at 0 unless you absolutely feel you need more bass. in which case bump it up a little at a time and listen for distortion.