Ok, I am very knowledgable with electronics and audio equipment (its my job), but i know nothing about car audio. here is what i want to do:

I have a nice cd deck with ipod hookup, so i dont need that. I listen to power metal, lots of double bass. I dont want huge bass sound like the rap people, just want the double bass to hit good, but short so the double bass is distinct.

Car is a 92 Beretta GTZ, which has a good size trunk, but i dont want these things taking up alot of room. i have a pair of infinnity 693.7i 6x9s i have to put in still, but if someone can help set me up with a good bass sound i would appreciate it

oh, and i want to keep it CHEAP, so used is ok. also, i will not be cranking the sound so my windows shatter, so i dont need a 5000 billion watt amp, just want good double bass. but i want to hear the guitar and singing over it still.

Thanks for the help