Q Power HD115VL Single 15" Heavy Duty Extra Large Vented Subwoofer Enclosure

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.

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.

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.

Good build quality, I did put different spring loaded terminals on my box tho. Nothing wrong with the orignals just seemed a little small for bigger gauge speaker wire.

Box looks good seals look a little weak but haven’t installed, box damaged during shipping guess I’m lucky the big hole was where the sub goes, other wise looks good, shipping time was fast