Rather than hijack another thread, I started this one to document my dual UXL-18 builds. Many thanks to members such as LTD, Steve nn, Laugsbach, Dominguez, Chalugadp, Martycool, Atabea, Scott S., Bill F., and others, for not only their advice, but their time and efforts to expand my education on subwoofers. Hopefully I can help others by sharing my experiences. So, here goes...
Due to space and spouse constraints, I could not build a Marty sub. I needed a design that would be more square-like, but not too tall either. I wanted to get as close as I could to the performance of the Marty. So this is what we came up with...
Ported, front firing subwoofer
28W x 28D x 34H
9.9 cubic feet net each (after driver, bracing, and port – double front baffle).
Tuned to 17hz.
Driver – UXL-18 (.243cf)
Bracing: approx. 600 cu/inches using 1” round dowels
Vent: 2.5”H x 25”W x 46.6” long with 15% WinISD adjustment for slot port that gives a total effective length of around 55” and a tuning frequency of 17hz. (should be lower with added stuffing).
Vent: 4022 cu/in (3.25” x 26.5 x 46.7 accounts for slot board and slot braces)
Note, this design is not handi-panel friendly. You will have to cut three 4 x 8 sheets for each enclosure...
Graphs below are with 1200 watts: