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Adding bass to a truck can be a very complicated problem to tackle, especially when building a box! We offer pre-built enclosures that are ready to be dropped into your 88-98 Chevy CK / GMC Sierra truck that offer unbeatable performance and sound quality that simply cannot be matched. This is a dual 12″ down firing model, why down firing? This style enclosure actually increase the SPL output of your subwoofers forcing the sound waves to travel up in down inside the cab before reaching the listener. The woofers are spaced off the floor so it's not possible for them to hit the floor while playing. It also keeps the subs out of view for security concerns. Overall you cannot find a better fitting or sound box.
You will not only see a difference in the quality of the boxes we build, but you will hear the difference and that is what is it is truly all about.
Our boxes are made from precision cuts of MDF. They are then liquid nailed, nailed and completely sealed. We then wrap them with high quality carpet that matches most vehicle interiors. All Boxes feature high grade spring loaded terminal cup(s) for the absolute best connection possible. All the custom series enclosures are made to fit precisely into your Chevy CK 88-98 Extended Cab to the get the max performance from every extra inch of wasted space.
Specifications:
- Air Space: 0.95 Cubic Feet
- Mounting Depth: 5"
- Sealed Enclosure
- Dimensions: Width 56-3/4" x Front Height 10" x Rear Height 6-1/4" x Depth 13-1/4"
- Constructed with High Quality MDF
- High Quality Binding Terminal Cup (Accepts Banana Terminal Plugs OR Bare Wire 'up to 10GA')
- High Quality Black Carpet
- Enclosure installs under rear seat down firing
Customer
2025-08-08 20:57:48
I'd go 4 and a half stars but considering the price, overall its not to bad. Any 12" sub with anything other than the most simple stamped steel basket will require clearancing around the edges on the sides and the front of the box before they will fit. And ANY sub that you use will hit the floor at full extension so you'll have to add some spacers underneath the sides for clearance. I had to add about 5/8". The seat still has room to go down so people can sit, which is good until somebody actually sits in it, then the box goes umph'. The box does use up a little bit of leg/foot room, maybe an inch or so, but it does fit cleanly overall, other than the gap in front that the spacers you have to add leaves. And even without spacers there is about a 1 inch gap over the transmission hump, so there's that too. They say a total airspace of .95 but when I measure I get about ~.87 per side for around1.74 total. They sell a box identical to this but for 1 sub and its half the size and they claim .9 for that, so I'm going with my measurement. The box has a center divider so maybe that's why there is confusion. Don't know why, I've never heard a box sound better with one, first thing I did was knock that out. It wasn't really easy, but it was. Anyway, it would be about 70-85 bucks just for the materials to duplicate this box so even though its not perfect its still worth it if your cool with making some minor mods to it. To add a couple of passive radiators on the bottom then remove the spacers and seriously modify the box to mount some front firing 10's would likely be the best boom for the buck that you would get from this box, in time that's what I'll likely do, but for now my old 12's mounted down fire, some SKAR VD's, sound okay even if they sound kinda' muffled. Good luck.
isaac
2025-06-30 10:23:45
Ok so we'll I ordered this box brecause I wanted subs but I also have to put people in my back seat. The box it came in was really beat up but the sub box was fine. It shipped the Monday I ordered it and it was here Thursday morning. You have to remove the tool box under your back seat in order to put the box in. Once I got it all wired up I tested it and it can hit the lows really good. Each side of the box is almost 1cubic foot so they really thump back there. If you want to save space but get the most out of you truck then get this box. The only con I see is that the box sticks out from the seat a couple of inches.
Andrew
2025-05-15 12:10:00
This box fit perfectly under the back seat with only about 1.5" of the bottom sticking out but that doesn't hinder any leg room for passengers. The subs, I put ma audios in it, hit hard. It sounds great on the inside and the outside because it doesn't sound like somethings going to fall off like most of the cars with subs today because the subs face towards the floor. The only modification I had to do was put a 5/8" piece of wood on the outside edges of the box so the subs wouldn't hit the floor and there's still enough room for the seat to sit like it should. I also mounted the amp to the box over the hump in the middle and there's enough clearness for it so it doesn't overheat. The box was built perfectly and probably better than anyone could build themselves because it's a very unique space. I would recommend this box to anyone.
Seth Johnson
2025-03-21 18:57:09
This is a solid box for your 12" subwoofers. The craftsmanship is very good. Seems just a bit thinner than 3/4" MDF. I doubt it will deform, though.Here's the trick. You need 11" cutout and less than 6" depth on those subs to fit this box. For 12" subwoofers that actually ties you down to some limited purchase options. I ended up going with a pair of which are more shallow than they need to be, and every other dimension fits this box, including the trim ring not overlapping the standoffs. The other limitation of this enclosure that the Kicker CompRT's respond to well is the volume. This box only offers .95 cu feet of air. The CompRT subs only ask for .55. There aren't a lot of other subwoofers out there spec'd for less than 1 cu foot of air.I deduct one star in my review because I think those standoffs are unreasonably close to the cutouts. They could have been cut to allow larger trim ring subwoofers to be installed.In case anyone is wondering, I've got a powering those two Kicker CompRTs. Sounds great with this enclosure.This box sticks out about 3.5" from under the rear bench seat in my 1996 Chevrolet K1500 Silverado. Please see pic.
Yordi
2025-03-09 09:25:16
Ordered it for my 95 silverado extended cab it fits perfectly underneath the back seat it doesn’t take up space, so the rest of my family can enjoy in comfort while listening to music, definitely recommend this this box for someone who wants bass but does not want to Sacrifice space.
Someone
2025-02-12 09:38:44
Let me just say the sub box itself is very good quality. I have no issues with the quality of it. My only complaints have to do with its size description. I ordered the 12in box for 12in subs. When the box arrived I had to modify it a bit to fit the subs because they would not fit in. I had to cut off part of the sides so my subs would fit. My other complaint has to do with the shape of the box. I put it on an extended cab 1994 Chevy. It fits under the back seats but not how I was expecting. I thought it would fit flush under the seats but it does not. The sub box sticks out a bit from under the seats but it’s not much. I would’ve been more satisfied if it did fit clean under the seats. Overall it’s not a bad product, I would just say that some might have trouble with the size like how I did.
James K.
2024-12-17 10:05:39
The Box started rattling and coming apart within 60 days. The company had no interest in helping me
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