Description
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.
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 stainless steel 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 an impact and weather resistant black or white textured polyurethane as standard, however RAL colour matching and enhanced weather-protected outdoor options are also available.
The EMS-156 requires a single amplifier channel, and the use of external DSP is recommended for system protection with high pass filters and limiters – as such it is recommended to be used with EM Acoustics’ range of Advanced System Amplifiers. It is however possible to use other DSP-enabled amplifiers, or conventional amplifiers with external DSP. Suitable DSP settings are provided on the EM Acoustics website. The EMS-156 requires a single amplifier channel capable of delivering 1000-1500W RMS into an 8-ohm load.