Down4Sound Down4sound PRO-FAB Birch FLAT PACK 12 | 1 12 Sub Box | DIY 12-Inch Ported Subwoofer Enclosure Box

Description 7 Reviews Description Are you in the market for a top-quality from birch wood ported 12 inch sub box flat pack? Look no further than our flat pack sub box, designed to give you the ultimate in flexibility and convenience when assembling your own subwoofer enclosure kit. Crafted from high-quality materials, our 12 inch sub box flat pack includes ALMOST everything you need to build a durable and long-lasting subwoofer enclosure kit, all without breaking the bank. The flat pack design makes it easy to assemble and customize your sub box to your exact specifications, so you can enjoy the perfect sound quality every time you hit the road. Whether you're a DIY enthusiast or a professional installer, our flat pack sub box is the perfect solution for upgrading your car audio system. With its superior design and easy-to-use components, you'll be amazed at how easy it is to achieve outstanding sound quality and deep, rich bass. So why wait? Order your DIY PROFAB 12 inch sub box flat pack today and experience the ultimate in convenience and performance. Our subwoofer enclosure kit is designed to meet your every need, with a customizable design and premium components that are built to last. Don't settle for anything less than the best - upgrade your car audio system with our flat pack sub box today! 2.0 Cube Single 12" Enclosure .75" BIRCH WOOD 32Hz Tuning Subwoofer cutout - 11 1/16" Mounting Depth - 12.5" GRADE 8 terminal Cup 2.4ft3 GROSS VOLUME 25.6in2 PORT AREA SUBWOOFER BOX DIMENSIONS L x W x H: 22.5 x 17 x 15 INCH all the pieces to build a box, except terminal, glue, and screws ****ALL SALES ARE FINAL**** View All Close 7 Reviews 4 a good place to start, economical Posted by Mark Salisbury on Feb 24, 2026 I'm really happy with how it came out. as has been said, be careful on the corners, screws do overlap. So I ended up drilling out all the screw holes, when I started to screw it together the wood was splitting. drilling took care of that. I have a MMats pro audio 12" in it now. I'm really impressed, sounds better than my alpine prefab type r box, the type R box has a ton of port noise. No noise on this box. for $118 I don't think it can be beat. I also sealed all the edges inside with caulk to prevent any air leaks. Thanks JP!!! 5 Great BOX Posted by Victor on Oct 09, 2024 Super nice box! really impressed with the looks and sound! 5 12 inch DIY Flat Pack Posted by Juan Roque on Jul 28, 2024 Received flat pack no damage at all packed very well took less than 1 hour this enclosure sounds amazing and I especially like the 32hz tuning huge improvement from the previous prefab from ebay which had 43hz tuning thanks jp and d4s as a whole definitely recommend if your on a budget you'll be pleased for sure 4 Good quality box for cheap Posted by Phil on Nov 06, 2023 Box is good quality. Easy to put together just be careful on the corners cause the screws meet up and you’ll bust the box. Only complaint is it didn’t come with screws. 5 1 12" DIY flat pack box Posted by Laurants mccloskey on Sep 26, 2023 Yeah this is a good deal for sure. Need to be able to access my spare easily for a couple months so I took out my raised floor 2-12" sub custom box I built & threw 1 of the 12s in this thing after screwing, gluing & paint. It makes almost as much bass as the custom aeroport 2-12s box I built! Definitely tuned nice & low as well. You almost couldn't buy 1 3/4 4×8 sheet of birch at home d for 119... they were 109 when I checked before grabbing this. Certainly worth every penny! 4 Almost perfect Posted by Frank on Jul 06, 2023 My only problem is that the pre drilled holes on the corners intersect with each other and if you aren't careful you will punch a hole out the side of the box. 4 Single 12" flatpack Posted by Marcel on Jul 02, 2023 The pieces aren't cut exactly flush and I wish the mating surfaces were routed out so I wouldn't need a 90° jig. Also, it's only pre-drilled on the face so you're going to have to do some drilling. But for the price it's still pretty damn good. I've got a small overhang on one side that I can fix with sanding or my router. Everything else fit perfectly. I stained it and did a satin finish. I wish I could link a pic because it came out gorgeous. View All Close