I friend of mine bought a Rythmik Audio FV15HP Direct Servo subwoofer Kit. I have had the fun of building the enclosure for it. I have not built anything this big and heavy since my car stereo days, a long time ago.
The plans call for a dual port enclosure with 3/4" mdf sides, top, bottom, inner braces and 1 1/2" mdf front and back. I have never built anything quite like it, there are two inner braces with one large hole and two small holes in each brace. The small holes in the braces are for the port tubes to pass thru to the rear chamber of the cabinet. The large holes are different a size in each brace. Look at the pics and you will understand. How all this different size chambers and different size holes in the braces is to work is beyond me, I just built it according to plan. All edges and braces were dado cut on a router table.
The first two pics came out wrong, the ports are at the bottom of the front not on the end.
The front face and back were cut for the woofer and port holes and amp mounting hole then another piece of 3/4" was laminated on the back of each. I used a bearing guided trim bit in my router to cut thru the lamination.
