The new THD 1-12" combo cab is a tuned-port bass-reflex cabinet like the THD 2-12". The 1-12" has a number of features that substantially reduce standing-waves inside the cabinet, giving it a very deep, even, tight and punchy sound. You won't believe that you are listening to only a single 12" speaker. The 1-12" combo cabinet is designed to sound as full and tight as a THD 2-12" cabinet. It uses a single THD Vintage 12".

This is the THD conversion kit, meant to put an existing UniValve, BiValve-30, Flexi-50 (or the soon to be released Deco-36) into. Early in 2008, THD will begin releasing 2-12", 2-10" and 4-10" combos as well, all designed on the same principles.