Inter-M CU-940H - Manual (Page 15)

COLUMN SPEAKERS
4 CU-920H/940H
Connecting your Speaker System Connecting your Speaker System
Always switch off the power to the amplifier before connecting speakers.
Choosing the Correct Speaker Cable
It is important to choose cabling designated for audio use and good quality connectors. Using guitar cable
or zip cord(designed for lamps and other electrical use) or poor quality connectors will degrade your loud-
speakers' audio performance. For distributed loudspeaker systems, we recommend stranded twisted pair
speaker cable with and overall vinyl jacket (plenum rated when installed in required installations).
Always use the appropriate gauge of speaker cable. For cable runs of less than 25 feet (7.5 meters), 18-
gauge cable is adequate. For longer cables, we suggest 16-gauge stranded cable.
Speaker Connection Procedures
After removing approximately 10mm (1/4-inch) of insulation from the ends of the speaker cables, twist the
strands tightly and when twist together with the distribution cable(s), using an appropriate cable connector.
Make certain the wires do not protrude form the cable connector and touch any metal on the speaker chas-
sis, or any other adjacent metal.
Connect speaker wires to the appropriate terminals for your mode of operation, as shown in the illustration below.
Maintaining Proper Polarity
It is very important to wire your speakers consistently in order to maintain proper polarity. All quality cables
are manufactured with clear markings to identify the different conductors - normally by color-coding, print-
ed markings, or textured ribbing on the cable's jacket material. Failing to do so will cause your speakers to
operate out of phase, resulting in significantly reduced low-frequency output from your system.
Choosing the Correct Amplification
When selecting an amplifier for use with your distributed speaker system, it is important to choose an
amplifier that has sufficient power output.
Choosing an amplifier that does not have adequate rated power may result in pushing the amp beyond its
limits, producing distortion or “ clipping” of the signal. This can irritate the listener and may cause damage
to the speaker.
Choosing an amplifier that is over-powered can result in over-driving the speaker system.
COM 250
Ω
500
Ω
CU-940H
COM 500 Ω 1K Ω
CU-920H