no, the gain is a setting on your head unit, look in your HU instrutioncs and see if it says what the gain voltage is and if it doesnt or you cant find it, turn the gain all the way down and the volume on your HU all the way up. then gradually turn up the gain untill you heard distortion, then back it off a little, but be carefull not to blow those subs. memphis makes good subs, even the PR, just turn down that DB boost knob a litle to avoid blowing the sub