But don't just go by a chart. Here's what builder Nick Birkby has to say about his T30s:

I built two full size T30's using JBL 2206 drivers. The sound from these cabs is nothing short of STUNNING! The bass has real authority and is fast and dynamic! Overall, the cabs have a way of reproducing bass in a very effortless manner, even with with heavy DJ/ dance material. Such a change from that 'struggling woofer' sound you get from typical 2x15 cabs. The waveform of the bass is 'tactile' if thats the right word. You can almost sense the momentum the wave builds up while travelling the length of the horn. Like a friggin express train when it emerges! Yes I am waxing a bit lyrical here, but the satisfaction of firing these up was unique treat! Construction was relatively easy for me using very limited tools. I built the second much faster than the first, and used a handheld circular saw for the internal cuts, the rest being cut to size by the timber guys. The sheer presence and authority of these cabs outweighs any hauling gripes. Big thanks to Bill and the excellent Forum resource!

Build cost ranges from about $200 loaded with an Eminence Delta 12 LF.

Construction Degree of Difficulty: 5

Performance Quotient: 10

Equivalent Retail Value: $ 1499

Recommended Top: DR250, DR280, DR290

Plans are $12.95, delivered within 24 hours as email attachment in MS Word format. 15 Pages, 20 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!