How? By using Tuba folding geometry and a high performance eight-inch driver. An eight you say? Surely an eight can't work as a sub? Yes, it can. Here's an SPL chart of the Tuba 18 in a room corner:

This review is from Carl Howell, who bought from me the original prototype:

I purchased the T18 that Bill built himself as the original T18 and I am really impressed. I bolted up the MCM driver, wired it up to my 1000 watt Crown amplifier, placed it in a corner, and grabbed all my "reference" cd's. I am extremely impressed with the output and extention from such a small driver, and relatively small enclosure. Bass is fast and punchy. I am really happy with this enclosure. Thanks Bill!!!

You want your sub to go low, you want it to go loud, but you probably don't want it expensive. The recommended MCM 55-2421 driver will cost you about $35. Plus, with its high efficiency the Tuba 18 only needs one quarter the power that other subs require, so you save money on your amp too. In fact, Tuba 18 saves you enough on the driver to pay for the amp! And once you hear the smooth, powerful bass that a folded horn delivers you'll know what every pro-sound tech already knows: Horns rule!

Construction Degree of Difficulty: 5

Performance Quotient: 7

Equivalent Retail Value: $ 599

Plans are $14.95, delivered within 24 hours as email attachment in MS Word format. 10 Pages, 18 Photos, 6 Diagrams. PDF available on request.

Also includes an active 3D program so that you can view the cabinet in any orientation with X-Ray vision!