Any recommendations for a speaker enclosure to hold 4 twelve inch subs in the trunk of a 1996 Honda Accord lx?

Any recommendations for a speaker enclosure to hold 4 twelve inch subs in the trunk of a 1996 Honda Accord lx?

Yes, custom-build one based on the specs (Thiele small parameters) of your subs. Otherwise, since you haven't told us what subs you have, we can't recommend anything. A poorly designed cabinet for a quad setup can really work against you. More is not always better. Get one really good 15" or 18" sub and put it in the largest recommended enclosure that has been custom designed for the specific speaker you buy. I have a single 18" sub setup that can blow away just about any 12" quad system you can put up against it. I've even built single, modestly powered 12" systems that have blown away quads. FACT. The cabinet design is the most important part of a system, especially if you want GOOD sound, not just loud.

A large garbage truck

Running 2 Polk audio and 2 new alpine each pair will be on their own 1000w amps.