OHM CT-10 - Installation Guidelines and Wiring Specifications; Wiring Guidance

CT-8 / 10 / 12 / 15 Full Range Loudspeakers
Version 2.0
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CT-10, CT-12 and CT-15 loudspeakers are fitted with threaded mounting holes, suitable for attaching
flying hardware or a wall-mount bracket. The details of the mounting points are shown in the
drawings. (pages 13, 15, 17)
5.1 Wiring
Ensure that all possible installations connections comply with the applicable safety guidelines
and that the size and strength of cables are sufficient. Ensure that all connections are secured
against coming loose.
Never use signal cables or power cords for suspending, aligning or securing the system.
Never use signal cables or power cords that are frayed.
To prevent the risk of electric shock, do not connect the loudspeaker with the amplifier switched
on.
CT-10, CT-12 and CT-15
These speakers are equipped with two parallel-wired Speakon connectors,
connected 1+/1- & 2+/2-
To avoid loss of power, the cables should have a minimum wire gauge of 2 x 4 mm
2
and more for
long distances. Ohm recommends using 2 x6 mm
2
cable and high quality Speakon connectors.
5. Installation
Installation should only be carried out by experienced technicians.
Before any installation indoors or outdoors ensure all risk assessments required are carried out.
Any technicians responsible for assembling, safe set up and use of the sound system on site must
be aware of all risk assessments.
Falling speakers can be FATAL. Always ensure that adequate attention is given to safe installation
especially when external forces could have a bearing on the stability of the speakers.
Before setup ensure every possible eventuality is addressed in order to prevent the system from
becoming unstable, i.e: uneven ground, weather conditions, unstable fixing points or people
knocking against the system.
Remember that speakers can also move as a result of vibrations.
Consult a professional rigger or structural engineer prior to suspending loudspeakers. Always
check the safe working load limit of the structure supporting any loudspeaker. Make sure that the
rigging hardware is adequately rated to handle the actual load in accordance with current health
and safety guidelines.
Avoid installing loudspeakers in places exposed to harsh weather conditions.
Maximum cable length for given cable thickness connecting one or two cabinets.
mm
2
SWG AWG m ft m ft
2.5 15 13 30 100 15 50
4 13 11 50 160 25 80
6 11 9 74 240 37 120
10 9 7 120 390 60 195
Length for two (4 ohm)
Length for one (8 ohm)Cable thickness