As we previously reported
, the H-PAS speaker technology making its debut at Atlantic Technology's off-site exhibit has been one of the most eagerly awaited events of the show. Simply put, this bass-building speaker technology works -- with tympani, bass clarinet, and of course pipe organ. While the midrange was not perfectly balanced, and we were informed that voicing will be tweaked, it was clear that Atlantic is correct in claiming that deep bass episodes don't starve the mids and highs or collapse the soundstage. What makes it work is what Tribeman calls a cascading of well-known speaker design elements such as bass reflex, inverted horn, acoustic suspension, and transmission line. In other words, "it's all in the plumbing" -- the drivers and crossover are nothing special. Credit is due to the inventor, Phil Clements of Solus/Clements. The prototype shown uses a pair of 4.5-inch woofers and is said to be flat down to 30Hz.