Cabling & Amplifier Selection - EM Acoustics EMS-122 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-122 and EMS-122w are designed to be used with professional power amplifiers providing the following
power outputs:
EMS-122/EMS-122w
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
The EMS-122 is supplied as standard with Neutrik SpeakON
recommended 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
Pins 2+/2- on the SpeakON
1000W/channel into eight ohms
working within its operating range!
4 ohms
11m
17m
22m
29m
44m
66m
TM
connectors are wired together to allow link-through with 4-core cables.
EMS-122/122w User Manual
www.emacoustics.co.uk
TM
NL4 connectors, wired pin 1+/1-.
Maximum Recommended Cable Length
8 ohms
22m
34m
44m
58m
88m
132m
6
It is
16 ohms
44m
68m
88m
116m
176m
264m