Ck out this tower I built over the winter. I have a 95 bayliner 2050 with a 4.3l... Does a good job for starting out. About 600.00 into it. I make the racks out of 1/2 inch plate aluminume, had them cut at a shop then sanded and polished them. Speakers I made out of pvc tube 6 inch and glued cap on them, painted and installed speakers, clamps off ebay for 50.00, total in speakers and racks 325.00.