Fibreglass Subwoofer Enclosure I Have A Box Subwoofer With 4 Holes In Front Or Rather Vents And It Also Has Fibreglass Covering The Two 12 In

I have a box subwoofer with 4 holes in front or rather vents and it also has fibreglass covering the two 12 in - fibreglass subwoofer enclosure

President face to face. I wonder how I will help fill out my sound to be safe and have a deeper, Poly, in my case, and if it is exactly where I said thank you can do for your answers