butyl, aluminum and acoustical foam make. i have an '07 f150 stock system w/ single cd mp3 player. i have $60 pair 3way pioneers in the front. i had the same speakers in the back but changed them out with a pair of $100 6x8 infinity reference speakers today. and over the months, including today, i have put 74 sq ft of dynamat all around my truck which cost $360 total. i also put 6 sq ft of acoustical foam with aluminum on it in my doors. b4 today, i had a pretty good sounding system. nothing great about it, just good. bass was distorted on heavy bass and/or high volume. after the second layer of dynamat inside the doors and the acoustical foam today i truly feel like BOSE corporation put a system in my truck. i've let a couple of friends listen to it, and to paraphrase them they said "wow, you finally got that 6.5" bazooka you wanted to throw in there!". not even. i have a stock head unit, 4 aftermarket speaker and some butyl/aluminum/foam that cost more than the head unit and speakers. i plan on adding 6 more sq ft of acoustical foam and will not be getting the 6.5" bazooka because it's not needed. on cds, i have to keep the treble 2 or 3 notches up from zero to make the music sound balanced. on the radio, i have to bump it up 4 or 5. this is the only complaint i have about my system now. i have to go into the settings for each radio or cd session. but it's worth it.

 

Alright good to hear it sounds good and your happy im not much for bass but i love a good sounding system

 

i'm not much for bass either. i'd much rather have what i have now, than something with more bump. i drove around today, and the music so crisp and distortion/vibration free that it kinda almost makes me feel claustrophobic. and i'm not claustrophobic, just kinda feel confined. as for the bass, it feels like i have subwoofer in there with some punch to it. i think the foam just won't allow the plastic panels/door panel to vibrate at all allowing the speaker to do what it's supposed to do, rather than vibrate with the inside of the door panel.