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Your cart is empty.Bbox Dual 12 Inch Sealed Subwoofer Enclosure Fits 1999-2007 Chevrolet/GMC Silverado/Sierra Extended cab OEM-Fit is designed and engineered specifically for the 1999-2007 Chevrolet/GMC Silverado/Sierra Extended cab trucks to ensure an OEM fit without impeding the operation of the back seat. Specially Formulated Aliphatic Wood Glue to ensure an airtight seal between all MDF parts with a second application of glue around all internal joints after final assembly.
Mark Cash
2025-08-21 12:01:03
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.
Annie
2025-08-09 13:20:08
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.
Rayskat
2025-07-15 15:04:45
It won't let me upload a picture but it fit perfectly under my backseat. Nice box. I have a 800watt pioneer amp and it's a little to big to fit beside the box under the seat. So a more slim amp would be better. 2004 GMC Sierra extended cab z71 package. Also, you have to take the terminals out to wire it, it didn't come wired.
Erick Aragon
2025-07-08 15:53:05
Hits pretty good Solid cheap box
Crazyhorse65
2025-06-14 16:03:35
It fits nicely in it's spot under the back seat and looks good with my charcoal interior. I only gave it a 4 star rating because the connectors are really low budget. The have a push away spring fastener that really has to be pushed back in place after putting the speaker wire into it, or it will be loose. I soldered my wires to the inside edge of the fastener as the original type just had small clips that slide onto them. They slid around and I wanted them to be secure. Overall, a decent box and I would recommend it to anyone with my style of pickup, which is a 2006 extended cab Silverado 1500. I think they changed the truck model in 2007 and they have a different box for that type. You should check the Atrend site to make sure you are getting the right one for your vehicle. I believe this one says 1999 and later, but that is only 1999 to 2006. Oh, yes, UPS did kinda beat up the package a bit in shipping but mine did not require any repair, just a blemish on a corner that is now on the floor anyway. Here is the link to the Atrend site. [...]
Canon
2025-03-18 14:26:55
it didn’t fit in my 07 chevy1500
Jose Ortiz
2025-02-25 12:48:18
Box came a little torn up, but there was no damage done to the box. Got it installed and the sound quality is great. My son is enjoying the system, and is very happy with the sound.
Amber D
2025-02-21 15:33:04
The original packaging the item comes in is very small and my "new" item had some scrathces on it. It wasnt enough to look bad at all tho and is barely noticeable. The box is great, designed well and is very nice. It hits hard with my subs and i dont have any complaints. It fits nice under my seat, only downside is the amp didnt fit on top. Overall i love the box, it sits flush and looks very nice.A+
Clint Thompson
2025-01-10 13:37:28
This will not fit a Canadian version GMC Sierra or Chevy Silverado Extended cab. I guess the drive shaft hump is different in the USA trucks than in the Canadian version. Go figure eh. 🤔
Customer
2024-12-11 18:47:41
The dimensions listed are not correct 2" bigger than what description says doesn't fit correct under seats
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