Crown Audio 140MPA - Manual (Page 10)

Commercial Audio Series Mixer-Amplifiers
page 10 Operation Manual
2.4 Choose 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
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).
Figure 2.7 Connections to the Preamp
Line Out Connector
Figure 2.8 Connections to the MOH
Line Output Phoenix Connector (1V or
1W Connector)
Figure 2.9 Connections to the MOH
Stereo Line Out Connector
Music-On-Hold Connections
If you have an external FM or XM tuner connected to the
140MPA Input 4, 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-ohm transformer-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-volt Music-On-Hold output (in
parallel with 600-ohm connectors, so they are isolated).
See Figure 2.9.
AMPLIFIER OUTPUTS
Figure 2.6 Amplifier Output Connections
-
To telephone system
interface/PBX input
To telephone system
interface/PBX
2 Setup