At car if you want to get top grade SQ without equalizer adjustment, is just impossible.

Dun compare car with home stereo, at car listening position and space, door condition, sound proof level all will affect the SQ.

Provided you have a top amp and top speaker, without equalizer and proper sound proof, is just a piece of junk.

Why i know this? Because i heard a car with 20k SQ setup, HU is Aphine top model, he is a soundproof and SQ expert in Johor Area (Famous Audio).

What i want to tell is those highend car HU all come with more than 10 band EQ, is details EQ, if it is waste of money, they won't include it at all.

Somemore, car SQ setup need time alignment function HU, front/rear fader is just useless becos normally SQ is without rear speaker, and u need proper sond proof for your car. I think seriously you need to update your ICE knowledge before jump into that, else just waste of money.

Anyway, you can discuss SQ setup in ICE subforum, read the thread posted by 'Mr Wong'.

Bro, dun get insufflex la, useless and waste of money only...go buy some dampening sheet (STP or others cheaper brand ok too) and stick inside your door...The DIY effort is HUGE and CHALLENGING...

Bro those hardware bitumen might have the consequences of peeling off frm ur door,
don't play play as I kena b4 on my another car Kelisa
as they can't tahan the heat as much as like what automotive bitumen did..

BTW bro u selling insufflex rite? Might buy frm u nxt time when i starting to DIY my FLX

U can test drive FLX and if u like its ride and handling, u can change to that? I think should be easier than mix n match outside cos u won't know which brands work for yr BLM.