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EMS Series User Manual
www.emacoustics.co.uk
PRODUCT RANGE OVERVIEW
EMS-81/EMS-81i Loudspeaker
The EMS-81 is a versatile, full-range loudspeaker product designed for a wide variety of compact and discreet
sound reinforcement applications. It features a high-power 8” (203mm) vented LF driver and a 1” (25mm) exit HF
compression driver on a rotatable 90° x 60° waveguide. These components are matched by an internal UniPhase
crossover network for unprecedented sonic quality from a completely passive enclosure.
Through the use of the multi-angle enclosure, polemount socket, M10 and M6 rigging points and rotatable horn,
the EMS-81 can be used in a wide variety of applications from floor monitoring to permanent installations.
To rotate the HF waveguide:
1. Remove the front grille as described in the Maintenance section on Page 10 of this manual.
2. Using a 4mm Allen key, remove the four socket-head bolts retaining the HF waveguide in place.
3. Lift the waveguide up and rotate to the desired position – the wider exit of the waveguide shows the 90-
degree dispersion plane.
4. Reinstate the socket-head bolts and retighten. Avoid over-tightening as this may crack the waveguide.
5. Reinstate the grille as described in the Maintenance section on Page 10.
As with all EM Acoustics full-range products, no active controller or programmed EQ is required for correct
operation. For demanding applications, a 50Hz high pass filter is recommended to increase drive unit headroom
however this is not essential for normal operation.
The EMS-81i is the dedicated installation version of the EMS-81 with no handle or polemount, and with a single
NL4MP connector and a four-way barrier strip instead of two NL4MP connectors.
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