Q PowerEasy to Install Durable 8 Inches by 11.25 Inches Dual Port Empty Subwoofer Enclosure Box with Underseat Down Fire and Loud Bass

Fits the little skar 8s just fine. Will not fit a ddaudio 2508 however. Hole is to small and the magnet is to big without adding a spacer on the box. Over box is solid and very happy with the sound and bass output. No port noise and will get decently low. Fits perfectly under the supercrew f150 2019!

love the quality sounds great wasn't expecting it to sound like it does

2 8" sundown subs with this box in my 21 f150 sounds perfect. Box came in without a scratch. I have seen reviews of damaged boxes but that's on the shipper. Also the coating on this thing is great. Should last a lifetime.

Box came exactly as described, fit the two biggest 8’s I could get my hands on and still had room to spare. Sound quality is incredible in my 2011 f150 super crew.

First of all the packaging for this thing sucks. I ordered 3 different times from different sellers and they all arrived damaged. They are shipped in a single cardboard box with no packaging inside whatsoever. The box is also too long by about 6-8" so the enclosure slides around inside the box during shipping resulting in 2 of the 3 boxes busting out of the box during transit.Worst of all, I finally measured the enclosure and port to verify the air volume and tuning was correct.... it is not. The air volume is 1.6cuft but the port is tuned to 44Hz. The port measures 10"x1.8125" and is 12" long. For a 35Hz tune the port would need to be 21.3" long. Extending the port inside the enclosure would reduce the air volume, requiring an even longer port. The port would then block the cutout holes for the subs so its not really possibly. Qpower either has no idea what they are doing or are blatantly lying to their customers.

Update. I had box reevaluated. Front baffle didn't separate. I was lied to to try to get me to purchase a box. Apologies to seller. Issue was subs didn't sit flush due to the textured lining on the box. Fixed with rope caulk and the sound is amazing for two Skar SDR 8's. Wanted to update my findings and change my review. Box is well worth the money

Dimensions 49.5" wide x 12 5/8" deep. 9" front height, 6" back height. Gives about 2.3 ft³ total. With port displacement closer to a little over 2. Front baffle is ¾ mdf. The rest looks like ⅝. Solid build. Speaker terminals are behind each sub on top of the box. The tuning states 35 hz and man this thing booms. I had 2 skar vd10s in a down fire ported box before, and this box with 2 evl8 subs sound better. Shakes the whole truck. The only con, in my opinion is the small gap in front under the seat. I would also like to see a lower tune like 32hz. Don't get me wrong, with the right subs, this thing booms! But it starts to roll off in the lower 30 hz range. Still a great pre fab box!

Sounds good I would buy it again fit good looks good people always ask what I’m running love my 8s

Q power pre fab works great sounds great my 8” U’s go hard if you’re looking and thinking about a box for your truck just do it for the price can’t complain