Crown Audio 180MA 280MA User Guide
Commercial Audio Series Mixer-Amplifiers
page 7
Operation Manual
1 Welcome
Figure 1.2 Back Panel Controls and Connectors
(280MA shown)
(280MA shown)
M. Amp Config Switch
A DIP switch with two functions:
1. Assigns one of the inputs as the priority input for each
output, thereby temporarily muting the remaining inputs.
Muting is activated by contact closure.
2. Global enable switch for phantom power. Does not affect
RCA inputs. Default position is off.
A DIP switch with two functions:
1. Assigns one of the inputs as the priority input for each
output, thereby temporarily muting the remaining inputs.
Muting is activated by contact closure.
2. Global enable switch for phantom power. Does not affect
RCA inputs. Default position is off.
N. Input Routing Switch (280MA only)
DIP switches that assign each input signal to each output.
Two switches per input.
DIP switches that assign each input signal to each output.
Two switches per input.
O. Link In/Out Switch
Slide switch, one per channel. With the Link Switch IN, any
signal applied to the Amp Input connector will be mixed
with the input signal(s). With the Link Switch OUT, only the
signal from the Amp Input Connector will appear at the
amplifier output.
Slide switch, one per channel. With the Link Switch IN, any
signal applied to the Amp Input connector will be mixed
with the input signal(s). With the Link Switch OUT, only the
signal from the Amp Input Connector will appear at the
amplifier output.
The tone generator has been omitted. Call Crown Tech Sup-
port if you have a tone generator question.
port if you have a tone generator question.
P. Mic/Line Input Connector
3-pin Phoenix-type, balanced, one per input channel.
3-pin Phoenix-type, balanced, one per input channel.
Q. Mic/line Switch
Selects mic-level or line-level input signals. One switch for
each balanced input.
Selects mic-level or line-level input signals. One switch for
each balanced input.
R. Dual RCA Input Connector
For stereo music signals, unbalanced, summed together,
two connectors per input channel. If required, both the mic/
line and RCA inputs may be used at the same time. The mic/
line gain switch does not affect the RCA gain, which is fixed
relative to mic/line. The mic/line and RCA signals are
mixed. Note: Other equipment connected to the RCA jacks
should be connected to the same AC power source as the
mixer-amp to avoid hum.
For stereo music signals, unbalanced, summed together,
two connectors per input channel. If required, both the mic/
line and RCA inputs may be used at the same time. The mic/
line gain switch does not affect the RCA gain, which is fixed
relative to mic/line. The mic/line and RCA signals are
mixed. Note: Other equipment connected to the RCA jacks
should be connected to the same AC power source as the
mixer-amp to avoid hum.
S. AC Power Inlet
Detachable IEC.
Detachable IEC.
T. Priority Connector
3-pin Phoenix-type connector allows Input 1 or Input 5
(280MA only) to mute other input signals by contact clo-
sure.
3-pin Phoenix-type connector allows Input 1 or Input 5
(280MA only) to mute other input signals by contact clo-
sure.
U. Output VCA Connector
4-pin Phoenix-type connector for one (180MA) or two
(280MA) VCA control lines of +10 VDC and ground. Com-
patible with Crown 1-VCAP and 4-VCAP modules.
4-pin Phoenix-type connector for one (180MA) or two
(280MA) VCA control lines of +10 VDC and ground. Com-
patible with Crown 1-VCAP and 4-VCAP modules.
V. Amp Input Connector
3-pin Phoenix-type, high-impedance balanced, one per
amplifier channel. Used to link an additional mixer to the
mixer-amplifier. Or used to connect an external processor
(see Section 2.9).
3-pin Phoenix-type, high-impedance balanced, one per
amplifier channel. Used to link an additional mixer to the
mixer-amplifier. Or used to connect an external processor
(see Section 2.9).
W. Line Out Connector
One 3-pin balanced Phoenix-type connector per output
channel. Post master, pre-VCA. Level controlled by master
volume control.
One 3-pin balanced Phoenix-type connector per output
channel. Post master, pre-VCA. Level controlled by master
volume control.
1.3 Back Panel Controls and Connectors
J. Reset Switch
Resets the circuit breaker that protects the power supply.
220/230/240V units have a fuse instead.
Resets the circuit breaker that protects the power supply.
220/230/240V units have a fuse instead.
K. Auxiliary Power Input
2-position terminal strip for 24 VDC (±10%) backup power.
Accepts up to 10 AWG terminal forks. NOTE: To
prevent a spark when attaching a battery, have
unit turned on and connected to the mains supply.
2-position terminal strip for 24 VDC (±10%) backup power.
Accepts up to 10 AWG terminal forks. NOTE: To
prevent a spark when attaching a battery, have
unit turned on and connected to the mains supply.
L. Amplifier Outputs Connectors
One per channel, 4-position terminal strip with COM (Com-
mon), 4 ohms, 70V and 100V terminals. Accepts up to 14
AWG terminal forks. Non-touch cover included.
One per channel, 4-position terminal strip with COM (Com-
mon), 4 ohms, 70V and 100V terminals. Accepts up to 14
AWG terminal forks. Non-touch cover included.
NO FUNCTION
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