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

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$176.99

$ 76 .99 $76.99

In Stock

About this item

  • Equipped with 2-hole 8-inch openings allow for an ideal fit for 2 subwoofers, design is made to fit dual 8-inch subwoofer boxes for guaranteed clear sound
  • Car subwoofer boxes and enclosures provide the ideal spot for extremely loud bass playing with the underseat down fire capabilities featuring a louder and crisper sound
  • Bed liner material provides durability, protection, and extra resistance to wear and tear for long use in the car as a dual subwoofer enclosure
  • Enclosure's design makes for an ideal spot for loud bass playing; Equipped with a tuning frequency of 53 hertz, offering a competitive quality against a bigger dual 12-inch subwoofer
  • Equipped with a mounting depth of 11 1/4";QPower values cars with premium music; Measures 8 inches with a mounting depth of 11.25 inches; Color black design



Product Description

CarSubwooferEnclosure
CarSubwooferEnclosure

CarSubwooferEnclosure

CarSubwooferEnclosure

CarSubwooferEnclosure

CarSubwooferEnclosure

Tstunna
Reviewed in the United States on April 4, 2025
Shipping was fast arrived with no bumps or bruises but it is ported but only one side is
Ben Falen
Reviewed in the United States on October 15, 2024
I purchased a JL Audio CP208LG-W3v3 and wasn’t happy with the lack of low frequencies it put out. I put the 2 JL 8W3’s (with a JD500/1 amp) under the seat of my 2022 F250 and it is a clean monster now. I previously had 2-JL 12w3’s in a JL Stealthbox in an F150. This is very comparable but not capable of the volume level of the 2-12’s. I’m very very happy with this box and setup. The JL Audio CP208LG-W3v3 was very punchy and wouldn’t play all genres at all in comparison to this box. Well worth getting rid of the storage under the seat to me.
User
Reviewed in the United States on May 18, 2023
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.
John White
Reviewed in the United States on January 29, 2023
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.
Dustin Schimkat
Reviewed in Canada on April 6, 2023
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
Andrew
Reviewed in the United States on September 16, 2021
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.
Jeffrey Monahan
Reviewed in the United States on March 27, 2021
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!
jimmie brewster
Reviewed in the United States on February 20, 2021
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
Alvin Carstensen
Reviewed in the United States on January 29, 2021
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!