portable

Hi everyone! First post here. My goal is to make a speaker box with two full range speakers and one subwoofer, with separate subenclosures for each speaker. I want a lower power battery mode to run off of a car battery, hence my turn to car audio speakers. For high power, I will have an outlet...

I recently bought a small Hyundai coupe, with crap speakers. I'm looking for a small, moderately priced, portable upgrade. (When I say portable, I mean i can pull it out if needed, not installed into anything) Any suggestions? Thanks, Jacob