cheap venom subs

[b<ben>n]

im cheap so what do you guys think about using 4 of these in a car
http://www.jaycar.com.au/productVie...&pageNumber=&priceMin=&priceMax=&SUBCATID=831
or am i just better off getting like 1 peerless 830514
i realy dont know much about car systems.

thanks