I’m looking for a subwoofer box for my Alpine Series X 12” subwoofer. I had it in a crutchfield box but I feel I need a bigger ported hole. I want something that slams. I do plan on buying two of the subs or rather another one but I need a better subwoofer box. Anyone can build one n ship it to me or a website that designs some good ones? Someone help me out wit a box. I also have the ax-90 or whatever it is if alpines mono amp that is currently discontinued to power it. I got the 17 Sport by the way with Sony premium sound system.