Crown Audio 180MAx operation manual Welcome, Commercial Audio Series Business Music System, page

Commercial Audio Series Business Music System

1 Welcome

1.3 Back Panel Controls and Connectors

H. Reset Switch

Resets the circuit breaker that protects the power supply.

I. Amplifier Output Connector

4-position terminal strip with COM (Common), 4 ohms, 25V and 70V terminals. Use either 4-ohms or constant-voltage terminals, but not both. Accepts up to 10 AWG crimp-on terminal forks. Non-touch cover included.

J. Preamp Line Out Connector

3-pin balanced Phoenix-type connector. Post master, pre-VCA. Level controlled by master volume control.

K. Link In/Out Switch

With the Link Switch IN, any signal applied to the Amp Input con- nector 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.

L. Amp Input Connector

3-pin Phoenix-type, high-impedance balanced. Used to link an additional mixer to the mixer-amplifier. Can be used to connect an external processor (see Section 2.9).

M. Output VCA Connector

3-pin Phoenix-type connector for one VCA control line of +10 VDC and ground. Compatible with Crown 1-VCAP module.

N. Music On Hold Section

Top to bottom, left half:

Source Switch: Switches between Input 3 or XM, and routes the source to MOH 1V Line Out and MOH 1W connectors.

1V Level Control and Signal Presence Indicator: Trim pot adjusts level for Music-On-Hold 1V output. SPI flashes when MOH signal is present.

1V Output (Isolated) Connector: 3-pin Phoenix connector, 600-ohm transformer-isolated output, provides Music-On-Hold signal of approximately 1 volt.

Top to bottom, right half:

1W Select Switch: Feeds 1W MOH signal either to 1 watt output or internal speaker.

1W Level Control: Trim pot adjusts level for Music-On-hold 1W out- put.

1W Output Connector: 3-pin Phoenix connector provides Music- On-Hold signal of approximately 1 watt.

O. Input 3 Section

Input Connector: 3-pin Phoenix-type, line level, balanced, one per input channel.

Dual RCA Input Connector:

For stereo music signals, unbalanced, summed together, two con- nectors per input for inputs 1, 2 and 3. 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 equip- ment connected to the RCA jacks should be connected to the same AC power source as the mixer-amp to avoid hum.

P. Input 2 Section

Same as Input 3 Section.

Q:Input 1 Section Top to bottom:

Phantom Power Switch: Turns phantom power on or off for Input 1.

Input Connector: 3-pin Phoenix-type, mic or line level, balanced.

Mic/line Switch: Selects mic-level or line-level signal for Input 1.

Dual RCA Input Connector: Same as Input 3 Section.

Tel Connector: Transformer-isolated 600-ohm input, summed into Input 1 for paging from a telephone system.

R. AC Power Inlet

Detachable IEC.

S. Priority Ducking Section

Active Indicator: LED illuminates when VOX ducking is active.

VOX Threshold: Trim pot controls how loud the voice must be before ducking occurs. Can be set for no ducking.

Priority Connector: 3-pin Phoenix-type connector for push-to-talk mic switch. Contact closure activates ducking. Ducking does not affect Music-On-Hold outputs or stereo line out.

Priority Release Control: Trim pot adjusts release time of VOX duck- ing.

T. XM Radio Stereo Line Out Connector.

Dual RCA jacks for stereo music out of XM Radio tuner.

U. XM Input Section

RS-232 Connector: Currently inactive; will be used for diagnostics.

XM Radio Antenna Input: Connects to the XM antenna cable.

	U
Figure 1.2	Back Panel Controls,
Connectors and Indicators
Operation Manual	page 7