I would absolutely recommend Infinity Reference REF1200s they require less than a cubic foot of air space. I am very impressed with these subs, the box I have them mounted in is 4.5" wide. They bump very hard I love them. I have them set at 4 ohms on a 250 watt rms amp. They do exactly what I was hoping for. Great value great product. I was skeptical of slim subs in general but being that I have a crew cab Silverado I had limited space to work with. The mirror actually vibrates and I can feel the bass hit. More than I expected for sure.

These subs sound amazing. They shake the truck and hit hard. For shallows I am extremely impressed. 2 12" with a JL 500 watt amp matches them perfectly. Would recommend for awesome sound.

This subwoofer hits harder than I thought it would. I was looking for great overall sound, not overkill. This subwoofer worked out perfect for my application.

Good sound and doesn't require alot of power, but most importantly to me fits nicely under back seat of my double cab tundra.

Bought 2 of these to out in my buddies s-10 ran about 300 watss to each and was very impressed the reviews I read doesn't do them any justice.... Definitely a good buy for limited space