Crown Audio 160MA Setup, Commercial Audio Series Mixer-Amplifiers, Telephone Moh, page, Distance

Commercial Audio Series Mixer-Amplifiers

2 Setup

2.4 Choose Output Wire and Connectors

Amplifier Output Connections: Slip the cable lugs under the output screw terminals and tighten (Figure 2.6). Slide the supplied non-touch cover over the output connections from top to bottom to cover them.

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

Using the guidelines below, select the appropriate size of wire based on the distance from amplifier to speaker. The wire sizes apply to the 8-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

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 connector for Preamp Line Output (Figure 2.7).

Music-On-Hold Connections

100V

70V

8

COM

Figure 2.6 Amplifier Output ConnectionsFigure 2.7 Connections to thePreamp Output Connector

TELEPHONE

(MOH)

8 600

If you have an external music source connected to the 135MA or 160MA, you can play its music over a phone line while the caller is on hold. Use the connection shown in Figure 2.8 (either 8 ohms or 600 ohms) to connect the mixer-amp to the Music-On-Hold input on your telephone system interface/PBX.

If your phone system needs to be electrically isolated from the 135MA or 160MA, you can order an accessory isolation transformer from your Crown dealer, part no. IST. It connects either to the MOH output or to Input 1.

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To telephone system interface/PBX input

Figure 2.8 Connections to the Telephone (MOH) Connector

Operation Manual