guys.. my car stock sony 9 speaker audio is great however i feel the speakers on my doors bass sometimes goes overboard and it makes unpleasant bass rattles. so i'm thinking of reducing bass on the door speakers and channel the bass to my boot. so adding a subwoofer is the way. but i want to find out if i can add like a powered sub or something like that on top of my existing system and if that would be effective? I do not want to add extra amps if that is possible. doable??? opinions and suggestions welcomed. thanks.

underseat subwoofer.. something like this

http://www.mudah.my/MBQ+Underseat+Woofer+1...er-23501260.htm

great.. thats a good option to consider. is it worth? i mean the bass it generates.

nope. if you really want good quality (and quantity) bass, you will need a real sub

you can opt for this, http://www.youtube.com/watch?v=ZJVUAOkLH10 - Blaupunkt GTb 8A, at below rm500!

im also planning to buy this underseat sub since the price is so cheap. but hows the performance? whats the different with other branded underseat sub? This MBQ is china or taiwan brand if not mistaken.

active subwoofer is all u need lo...

The cone movement looks very distorted/uneven!