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EMS-81X User Manual
www.emacoustics.co.uk
PRODUCT OVERVIEW
EMS-81X compact passive loudspeaker
The EMS-81X is a compact, versatile, passive loudspeaker product designed for a wide variety of compact and
discreet sound reinforcement applications. It features a high-power 8” (203mm) neodymium LF drive unit in a
reflex enclosure, and a 1.7” diaphragm, 1” (25mm) exit neodymium high frequency compression drive unit coupled
to a 90° x 60° rotatable waveguide. These components are matched by an internal passive crossover network for
unprecedented sonic quality from a completely passive enclosure.
Due to its discreet size and appearance, the EMS-81X can be used in a wide variety of applications ranging from
fills and delays in corporate and theatre use, to compact front of house and floor monitoring duty.
As with all EM Acoustics full-range products, no active controller or programmed EQ is required for correct
operation. For demanding applications, a 70Hz, 24dB/octave high pass filter is recommended to increase drive unit
headroom however this is not essential for normal operation – please see page 7 for further information.
The EMS-81X is supplied as standard in black or white, and is fitted with two Neutrik SpeakON
TM
NL4MP
connectors. Custom colours, weather protection and specific connectors can also be supplied if required – please
contact your local EM Acoustics representative for more details.
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 label on the waveguide shows the dispersion
orientation.
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 11.
(25 pages)
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