5
i-2 User Manual
www.emacoustics.co.uk
SYSTEM SET-UP
Safety Considerations
Loudspeaker systems are potentially dangerous objects if used incorrectly. Please ensure that you read this
section fully, and contact EM Acoustics or your local dealer should you be in any doubt over correct operation
procedures.
Professional loudspeaker systems are capable of producing damage-inducing sound pressure levels, and hence
care should be taken when setting your system up, particularly when it comes to loudspeaker placement within a
venue. Damage to the ear can result from levels above 90dB under prolonged exposure.
Cabling and Amplifier Selection
The i-2 is designed to be used with professional power amplifiers providing the following power outputs:
i-2
400W/channel
into eight ohms
It is good practice to use an amplifier power 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
i-2 loudspeakers are supplied with Neutrik Speakon
TM
NL4 connectors, wired pin 1+/1-. The 2+/2- pins are
connected to allow link-through with four core cables. It is 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
Maximum Recommended Cable Length
4 ohms
8 ohms
16 ohms
1.0mm
2
11m
22m
44m
1.5mm
2
17m
34m
68m
2.0mm
2
22m
44m
88m
2.5mm
2
29m
58m
116m
4.0mm
2
44m
88m
176m
6.0mm
2
66m
132m
264m
A small power amplifier working too hard is more likely to damage a loudspeaker than a large power amplifier
working within its operating range!
