This sun box is amazing. I have 2 12 inch Polk subs that came in they're own ported box, decided I wanted my back seat back so I ordered this and I'm blown away. It hits twice as hard as the ported box and sounds amazing. Fits perfectly under the seat and is very solid. 10/10 would recommend.

Please note: off the rip, you gotta know this thing will work best after fully sealed in all corners and lines internally. Used Gorilla caulk in mine.. I wouldn't dare put speakers in it as it is and expect this to be, and stay sealed with motorized pressure pounders going in and out of it. Also budget 12 more dollars and replace the speaker terminals. I also went as far to buy some weather grommet and added that around the back of the speaker terminal replacements and the woofers themselves. I only used 4 screws per 12" woofer just to minimize holes and places that may have air leaks. Man it sounds good with some DVC 2ohm Skar audio subs in it. Installed for a 2005 Chevy Silverado extended.

Just trying to see if I can get a replacement because I had another truck be in the day when I bought it and I bought a new truck and know it started to break

I was very hesitant when purchasing this enclosure, because I was thinking that there's no way in hell this little box under the seat with the subs firing into the floor would sound good at all. Boy was I wrong, in the biggest sense of the word. What I have. 2 15 y/o Old School Kicker Comp dual 4ohm voice coil VR 12's under the back seat of my 02 Silverado Ext cab. 1 sub being pushed by a Fosgate 300.2, and the other pushed by a Boss audio 1100M Riot (about 250 watts RMS from the Boss amp) with them being set to output around the same power. This box makes these subs slam. It's well made, looks great, fits wonderfully and no rattling. Would absolutely recommend this to anyone needing an ext cab under seat downfiring box. You could not build an enclosure this nice for the $87 (with free prime shipping) that I paid for this. Inside the box along the seams of the dividers didn't have any sealant at all. So as some earlier reviews has stated, you may as well go ahead and re-seal the box upon receiving it. Less chance of rattling and the enclosure ripping itself apart later on. Just call it, preventive maintenance. If you like hard hitting bass, this is it. It arrived quickly, on time, and in great shape.

fits perfect 09 Chevy Silverado crew cab(4 full doors) , seat goes down all the way and didnt need to lift the back seat, the corners were crushed by delivery but i kept it anyway