QPower Heavy Duty Single Vented Subwoofer Enclosure, Charcoal Gray, 15 Inch | Carpet Covered, Extra Large 5.3 Cu Ft Air Space, 1 Inch MDF Face & 3/4 In Walls, 37 Hz Tuning, Gold-Tipped Spring Terminals

Bought this originally for the skar 15 svr d4 to be ran at 2 ohm. It worked pretty good with it sounded nice for the most part but could tell it was tuned a little high. I did the measurements and used a port calculator and says it's tuned around 35 hertz. I've pushed that sub to the limit and the box has done well. I upgraded to the 15" skar evl d4 ran at 2 ohms and omg it sounds so much better. Still out of spec for the subwoofer but is holding up well. By the measurements I took using the box calculator says it's roughly 3.9 f³. Port width is 2 ⁷/¹⁶ port height is 15 ³/¹⁶ and length is 16 ¼. Enclosure is built well from my experience and the weight backs that up. I will be upgrading soon but I do recommend this.

I've read a lot of the AI generated reviews in my opinion there was somebody who said that they measured out the box and that it was smaller in this or that or whatever this is what I know I've been messing around with subwoofers well we used to call them woofers I've been messing around with this stuff since I was probably 15 years old and I'm a lot older now I will say this the boxes on the heavy side it's big And I recently purchased this item and I put a subwoofer in it and I'm not running a lot of power under a 1000 W and this box definitely does the job I would highly recommend it it's a great buy for anybody that wants to put a decent subwoofer in it just make sure that the manufacturer's suggestions call for this size of box I would think it would match up well with a kicker subwoofer anyways I just wanted to talk about it because I did purchase it and I've been happy with the item so far I don't know how long it will last or it's durability but I'm optimistic but I will say that I would say if you put a quality subwoofer in this box and put maybe 1200 W RMS to it you would be fantastically surprised don't forget play around with EQ settings row windows up and down see what works best and wait for the subwoofer to break in I highly recommend this item

Box was well built but they ship it in a thin cardboard box so the corners get damaged. We all know the Amazon delivery workers are not gentle with packages. I sent it back because of the damaged corner. They need to ship it with more protection.

Long story short, I traded my ported 12s for a 15 in a sealed box. I regretted the decision at first, but then I bought this and now the single 15” hits just as hard if not harder than my 12s did, on less power. I’ve seen mixed reviews about build quality, but mine came in with no issues or loose areas. Sounds great in my little beater wagon.

Rear panel was loose and they don’t use any wood glue it’s all nails. The box I received also had a small tear in the carpet. It’s good value if you have a cheap sub but don’t use this for something expensive. Also In the break-in process of my sub I wasn’t able to crank up the gain for my amp and when I finally could I heard the rattling of the panel, thinking it was my sub bottoming out I resisted tuning my amp come to find out it’s the terrible build quality. The seller then told me there’s nothing they can do besides give me $20 lol what a waste.

So far So Good

Not a very great box for a big subwoofer but it will take a mid size subwoofer no problem. The tuning is kinda high but is pretty loud for a 80$ box. Only thing I recommend is don’t take the subwoofer in and out of the box a lot of times. After taking my subwoofer out a lot of times the wood begins to break and it becomes very difficult to screw you subwoofer back in the box and get it to seal correctly.

Great box for the price .. very sturdy and heavy duty .. definitely made my 15 slam