Shallow Subwoofer Honda Pilot What Kind Of Subwoofer Is Good For A 2007 Honda Pilot?

What kind of subwoofer is good for a 2007 Honda Pilot? - shallow subwoofer honda pilot

I just got a 2007 Honda Pilot LX, it comes only) with 4 speakers (Alpine. I wonder what is the best subwoofer that is shallow, but still large enough for deep bass and volume. Thank you.