The enclosure is made of high-quality multiplex wood and painted scratch, impact and weather resistant with a fine textured finish. Two ergonomic transport handles on the top ensure a light handling. The front of the loudspeaker is protected by a rustproof, coated steel grille with internally glued acoustic foam. An M20 threaded insert on the top of the case allows to carry a distance rod. In addition, four abrasion-resistant rubber feet on the underside ensure a secure footing. The recessed rear panel has two NL4 Speakon jacks and is used to connect and route the input signal to other speakers. The enclosure is available on request in RAL colors and as an installation version without handles and M20 thread.
Operation is as a slave subwoofer on the active hd P12stereo system subwoofer or on all Harmonic Design system amplifiers to ensure reliable and accurate low-frequency reproduction.