I've kicked around the idea of getting another sub in my 21i now since winter when I redone everything. I've pulled a tape every way possible to get a box in the observer compartment. Then I built 2 separate boxes for the ski locker that didnt fit by about 1/2". This is the last thing I can think of, and the easiest. Im thinking about building an identical box, maybe not the same dimensions but same volume and same tune, as the box under the helm. I would have the interior guy pleat some white vinyl to match the center cushion already there, and cover the top of the box with it. I'd also cut 2 kick panels and have them pleated for both ends of the box. I'd start the sub box AfTER the center cushion that is already there. So the box and the cushion over the box would be offset from the center cushion about 6-8 inches. I dont really want the box 3'-5" long, which is the dimension from the center cushion thats already there, to the sub box baffle that is under the helm. Since they're both facing the cabin, would it phase or matter if the boxes are offset a foot from each other? I've got the 13w7 and 1000/1 v2 sitting around already. I also have carpet for a small amp rack under the observer compartment flip up seat back, which is the perfect size for that amp. I also already have the acrylic ring with LED's glued to it and stand offs. So I have stuff laying around to accomplish everything, besides a 100 bucks in wood. Since I cant get out on the water this weekend because of the cold weather, rain, and 20mph winds, I figured I might as well see if this is something I want to pursue. I know everyone is probably thinking just buy a new boat, but that's not going to happen this summer
Anyone with their opinion or ideas on the phasing issue, or the look of it? I think if done like Im thinking about, it would look pretty badass, and sound even better!! I have 4 interstate 29's for a battery bank, rocker switches to shut amps off at party cove, and a perko switch to a starting battery, so Im not to worried about the draw on the house bank. Let me know what you guys think, Im wanting to start the box today. Ill attach my quick sketch and some pics.