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6.4 - System Connectivity
6.4.1 - Cable Length and Specification
All cables add to the system impedance, and as such careful selection is required depending on your
amplifier setup and overall system impedance. Cables with a cross sectional area of less than
2
2.5mm
should not be used. Recommended maximum cable lengths are given below:
Conductor Area
2.5mm
2
(14 AWG)
2
4.0mm
(12 AWG)
6.0mm
2
(10 AWG)
6.4.2 – Crossover Cable Use
The use of a pin-swap or "crossover" cable can allow for neater cable solutions when
sending different amplifier signals to the same location. Because pins 2+/2- are linked
through inside all EM Acoustics loudspeakers, using a 4-core cable to one loudspeaker
(carrying two different signals) allows a crossover cable to be used to link out of the first
loudspeaker into another, thereby feeding it from a separate signal.
4-core cable from amplifier to first M-C12 loudspeaker.
Signal for first loudspeaker on pins 1+/1-, signal for second
M-C12 loudspeaker on pins 2+/2-.
Crossover cable specifications
Connector A Pin
1+
1-
2+
2-
Maximum Recommended Cable Length
2 ohms
15m
20m
30m
4-core "crossover" cable wired as detailed below used to link
between the two loudspeakers. This will ensure the second
M-C12 loudspeaker is fed from the signal carried on pins 2+/2-
of the original cable
Connector B Pin
2+
2-
1+
1-
4 ohms
30m
40m
60m
Page 19 of 27
8 ohms
60m
80m
120m
M-C12 User Manual
v2 November 2019
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