Martin Audio gave its first viewing of the H3H high power enclosure, aimed at the install market. The H3H builds on the popularity of the Blackline series and utilizes all the same horn-loaded components as the H3, but in a horizontal format. Consisting of a single 15" horn and a reflex-loaded LF transducer, a 10" horn-loaded mid with a phase-ball loading device and a 1" exit compression driver mounted on a constant directivity horn. The mid and HF sections are integrated by an internal 2kHz passive crossover network and the enclosure is constructed of a multi-laminate birch ply.