Crown Audio 140MPA 2Setup, Commercial Audio Series Mixer-Amplifiers, page, Distance

Commercial Audio Series Mixer-Amplifiers

2Setup

2.4Choose Output Wire and Connectors

Amplifier Output Connections: Slip the cable lugs under the output screw terminals and tighten (Figure 2.6). Cover the output connections with the supplied non-touch cover.

Crown recommends using pre-built or professionally wired, high-quality, two-conductor, heavy gauge speaker wire and con- nectors. You may use crimp-on spade lugs for your output con- nectors. To prevent the possibility of short-circuits, wrap or otherwise insulate exposed loudspeaker cable connectors. Cover the output connections with the supplied non-touch cover.

Using the guidelines below, select the appropriate size of wire based on the distance from amplifier to speaker. The wire sizes apply to the 4-ohm tap.

Distance	Wire Size
up to 25 ft.	16 AWG
26-40 ft.	14	AWG
41-60 ft.	12	AWG
61-100 ft.	10	AWG
101-150 ft.	8	AWG
151-250 ft.	6	AWG

AMPLIFIER OUTPUTS

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Figure 2.6 Amplifier Output Connections

Figure 2.7 Connections to the Preamp	To telephone system
Line Out Connector
	interface/PBX input

Figure 2.8 Connections to the MOH Line Output Phoenix Connector (1V or 1W Connector)

NOTE: Custom wiring should only be performed by qualified personnel. Class 2 wiring is required.

CAUTION: Never use shielded cable for output power wiring.

Use 2-conductor shielded cable and a 3-pin Phoenix-type con- nector for Preamp Line Output (Figure 2.7), and for MOH 1V or 1W output (Figure 2.8).

Use 1-conductor shielded cable and RCA plugs for the MOH 1V Line Output RCA Connector (Figure 2.9).

Music-On-Hold Connections

If you have an external FM or XM tuner connected to the 140MPA, you can play its music over a phone line while the caller is on hold. Use one of the connectors below to connect the 140MPA to the Music-On-Hold input on your telephone system interface/PBX.

•MOH 1V Line Output Phoenix Connector: 3-pin Phoenix connector, 600-ohmtransformer-isolated output, provides Music-On-Hold signal of approximately 1 volt. See Figure 2.8.

•MOH 1W Line Output Connector: 3-pin Phoenix connector provides Music-On-Hold signal of approxi- mately 1 watt. See Figure 2.8.

•MOH 1V Line Output RCA Connectors: Two RCA connectors (mono) for 1-voltMusic-On-Hold output (in parallel with 600-ohm connectors, so they are isolated). See Figure 2.9.

To telephone system interface/PBX

Figure 2.9 Connections to the MOHStereo Line Out Connector

page 10 Operation Manual