Atrend Bbox Single Sealed 10 Inch Subwoofer Enclosure - Accu-Tuned Sealed Subwoofer Boxes - Subwoofer Box Improves Audio Quality, Sound & Bass - Fits 1999-2007 Chevrolet/GMC Silverado/Sierra Extended Cab

Fits perfectly under the seat. I paired it with a rockford fosgate p3 at 500w rms from a rockford amp. I bought some polyfill to put in it but wanted to try without first and it sounds so good I havent put the polyfill in yet.Obviously not gonna shake the car next to you with only one 10" sub, but its decently loud for what it is. I'm very happy with it.

Its pretty good.I currently have a 10" Alpine type r with 800 watt pionner ampIt hits really hard, i used to have two 10" pioneersOnly issue is the Alpine when hitting hard bass slightly touches the carpet (doesnt hit, just slighlty matts the carpet down)I think this is due to the large lip on the 10" alpine type RNo addition sealing required - My connector cup came with square speaker plugs on the insideHad to run to radio shack to get the crimped peicesIt fits well... I also slide my all the way to the door which gave enough room to rest my amp on the HUMP of the truck

I received the sub enclosure very quickly as usual from Amazon. I am no professional but I see the box as being well constructed and very durable, the only thing i didn't like about the box was the wire terminals. I found them to be cheaply made so I quickly found a replacement from an older box i had. As for sound quality, with this small truck box, you get what you pay for in the aspect of wanting it to fit under the back seat. It sounds ok but nothing to brag about. As for fitting in the truck, it was a perfect fit, doesn't have any wiggle room and doesn't budge and inch even when taking very rough roads. Hope this helps, overall great box for what it is.

Works better than expected. Very affordable alternative to what I had & wanted to replace. Using a 10" JL Audio sub in it. Works really good. 1-sub 1-box hits as hard as the dual sub box I had with the top tier JL Audio 10's in it. Definitely worth the buy & didn't have to empty out my bank account to get the sound I wanted.

I liked the box. I felt it was made well, but IT DOES NOT FIT UNDER THE BACK SEAT OF A 2006 CREW CAB CHEVY SILVERADO. Will not fit! Don't chance it! Some say it'll fit, but I don't think they know the difference between a crew cab, extended cab, extra cab, etc......

This box is very sturdy and looks great. However, this box had two air leaks. One on a seam and the other at the wire terminal. Also the terminal is very cheap and of low quality. Considering how well the rest of the box is made the terminal is a failure. I switched mine out for a better quality unit that would allow the use of up to 8 awg wire. A little silicone sealant and the box is perfect. Fit my 03 silverado ext cab perfect. Fit every curve and nook.

I put this in my 2002 Silverado Extended Cab. Fits perfect and actually under the rear seat by a few inches and out of the way. No defects or re-gluing, screwing or fixing with the one I received. Installed a Pioneer TS-W254R sub in it and connected that to a Soundstream Picasso Nano PN5.640D. Amazing sound coming from this little box with this set up!

It fits... but far from well. Fits transmission tunnel great but doesnt slide all the way back past the bump. Back of the box hits before that point. But it does fit under the seat and looks flush. As for defects, theres a list. In my last picture you see a seam on the corner. Does not seal at all. Like trying to use a colander as a soup bowl. The terminal connectors look nothing like the picture and are the cheapest Chinese crap Ive seen. There are no wires inside, had to make my own. Definitely not the nice nickel plated ones pictured. Aside from that, there are MANY gaps in the carpet, couple nails sticking through in places and best of all, a huge shoe print inside on the mdf from when it was being poorly built. Sounds fine but this POS isnt not worth your money at all. For about the same price and some time, you could build one nicer with an even better fit. Also, as picture shoes and the manufacturer website says, its for driver side. Nope, thats a lie, this is for passenger side.