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EMS Series User Manual
www.emacoustics.co.uk
EMS-121/EMS-121w/EMS-121h/EMS-121i Loudspeaker
The EMS-121 is a versatile, full-range loudspeaker product designed for a wide variety of sound reinforcement
applications, where higher SPL and lower frequency response restrict the use of the EMS-81. It features a high-
power 12” (305mm) vented LF driver and a 1” (25mm) exit HF compression driver on either a 60°H x 40°V (EMS-
121) or 90°H x 40°V (EMS-121w) waveguide. These components are matched by an internal UniPhase crossover
network for unprecedented sonic quality from a truly passive enclosure.
The family of different formats for the EMS-121 allows a wide variety of applications to be covered – from stand-
mounting for public address or small live use through to horizontal installation in low-ceiling venues. M10 and M8
threaded fixings and an integral polemount socket are provided for ease of installation – both permanent and
temporary.
As with all EM Acoustics full-range products, no active controller or programmed EQ is required for correct
operation. For demanding applications, a 40Hz high pass filter is recommended to increase drive unit headroom
however this is not essential for normal operation.
The EMS-121i is the dedicated installation version of the EMS-121 with no handles or polemount, and with a single
NL4MPR connector and a four-way barrier strip instead of two NL4MPR connectors. The EMS-121h is a horizontal
mounting, permanent installation version for use in situations where ceiling height is critical.
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