The EMS-81X is completely passive, yet outperforms many bi-amplified or processed designs. The enclosure contains an 8” (203mm) LF drive unit, linked via the internal passive crossover network to a 1.7” (44mm) diaphragm, 1” (25mm) exit HF compression drive unit. The HF drive unit is coupled to a constant-directivity waveguide, which produces a 90° x 60° dispersion pattern which can be easily rotated if required. The multi-angle enclosure along with the rotatable HF waveguide allows use in both horizontal and vertical orientations, as well as use as a compact stage monitor.

The robust enclosure is constructed from premium multi-laminate Birch plywood and is finished in an impact and weather resistant black or white textured polyurethane as standard. Two NL4 connections are provided on the rear for input and enclosure link. The front of the loudspeaker is protected by a rigid stainless steel grille backed with acoustically transparent fabric. A flush handle, 35mm polemount socket and various threaded fixings are provided in the enclosure for optional rigging hardware.