Reply to Subwoofer question

For playing in small bars (25-60 people), would it be possible to use a subwoofer originally intended for the trunk of a car? If so, what would be best? Sealed, ported, or bandpass for someone playing a mix of EDM and Hip-Hop? I'm asking because I have a gig toevening and I'd like to add more bass as I'm using some small 8" Kustom PA speakers w/ horns. Craigslist in the area has tons of car subwoofers in boxes for sale but I'm on a tight budget at the moment. Alternatively, I could bring my Pioneer home theatre speakers but I'd prefer not to do that as they're in wood-grain type cabinets and I don't want them getting scratched.