Hello- i have a 2010 srt8 challenger with the navigation head unit- my local audio shop installed a custom box for a t1d212 fosgate woofer witha p1000-1db fosgate amp i know - this thing should sound super intense- however i feel it is being limited- i had suspected and a friend of mine also pointed out that as i raised the volume the bass actually either decreased or tops out way too early- i believe bass stops or levels out at about level 25(ish)volume- my question is there a way to resolve this? what ways are there besides getting a Aftermarket Headunit- i would greatlyyyyy appreciate any advice and look forward to any help- thanks in advance