Cabling & Amplifier Selection - EM Acoustics EMS Series User Manual

personnel following safe working practice. Should you be in any doubt whatsoever, please contact
your local dealer who will be able to refer you to a suitable rigging company.
Cabling and Amplifier Selection
The EMS Series products are designed to be used with professional power amplifiers providing the following power
outputs:
EMS-81 500W/channel into eight ohms
EMS-121 700W/channel into eight ohms
EMS-152 1200W/channel into eight ohms
EMS-215 1600W/channel into four ohms
A small power amplifier working too hard is more likely to damage a loudspeaker than a large power amplifier
It is good practice to use an amplifier equal to the program power rating of the loudspeaker – so as to retain
sufficient headroom and good dynamic range. Care should be taken during operation to avoid amplifier clipping –
as this can cause serious damage to your loudspeakers. If in doubt, please contact your dealer who will be happy
to assist you in correct amplifier choice and setup.
Cabling
All EMS Series products are supplied with Neutrik Speakon
that the resistance of your cable is less than one tenth of the nominal system impedance. Given below are the
recommended maximum cable lengths for different cross-sections and impedances.
Conductor Cross Sectional Area
2
1.0mm
2
1.5mm
2
2.0mm
2
2.5mm
2
4.0mm
2
6.0mm
working within its operating range!
TM
NL4 connectors, wired pin 1+/1-. It is recommended
Maximum Recommended Cable Length
4 ohms 8 ohms
11m 22m
17m 34m
22m 44m
29m 58m
44m 88m
66m 132m
9
EMS Series User Manual
www.emacoustics.co.uk
16 ohms
44m
68m
88m
116m
176m
264m