The EMS-156 is a two-way passive loudspeaker, using a 4” (102mm) voice coil 15” (381mm) neodymium low frequency transducer. This low frequency drive unit is coupled via the internal passive crossover network to a 3” (75mm) diaphragm, 1.4” (36mm) exit neodymium high frequency transducer. This drive unit loads onto a constant-coverage horn, which yields not only consistent response throughout its operating band across the whole coverage pattern but also strong attenuation outside of this pattern. The result is a loudspeaker with extremely consistent and predictable coverage, as well as stunning sonic detail – and all with the ease of use that passive crossover technology brings.

The drive units are housed within a compact, vented enclosure. The robust enclosure is constructed from premium 15mm (5/8”) multi-laminate Birch plywood, and is heavily braced to minimise panel reflection. Incorporated within the enclosure are multi-use rigging plates, which allow suspension of the loudspeaker swiftly and safely in a variety of ways. The primary rigging system utilises keyhole plates and quick-release pins to allow attachment or removal of hardware in seconds.

Each plate (top and bottom of the enclosure) provides four exposed-thread M10 rigging points as well as the keyhole mounts, and an M8 safety/pull-back point is provided on the rear of the enclosure. A 35mm polemount socket is provided discreetly on the underside for stand mounting.

The enclosure also includes two flush bar handles, and a pair of Neutrik® speakON™ connectors for input and enclosure link. Lastly, a tough hex-punched grille backed with acoustically transparent fabric protects the drive units from damage. The grille can be quickly removed to rotate the HF waveguide if required, and the orientation of the waveguide can be determined without removing the grille. The enclosure is finished in black impact-resistant textured polyurethane, or white textured paint as standard, however RAL colour matching and weather resistant options are also available.

The EMS-156 requires a single amplifier channel and should be used with professional power amplifiers capable of delivering 1000-1500W RMS into an 8-ohm load. For optimal results the DQ Series Advanced System Amplifiers should be used.