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 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.

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 output.

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 connectors 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 equipment 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 ducking.

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

Operation Manual

Figure 1.2 Back Panel Controls,

 

Connectors and Indicators

page 7

 

Page 7
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Crown Audio 180MAx operation manual Back Panel Controls and Connectors Reset Switch

180MAx specifications

Crown Audio has consistently set benchmarks in the audio amplification industry, providing innovative solutions that cater to both live sound and installed audio applications. One of their notable products is the Crown Audio 180MAx. This versatile amplifier is specifically designed for delivering high-performance audio in various settings, making it a perfect choice for musicians, sound engineers, and audio professionals alike.

The Crown 180MAx boasts an impressive power output, capable of delivering 180 watts per channel into 4 ohms. This ensures that even in larger venues, the audio remains powerful and clear, meeting the demands of live performances and installations. A key characteristic of the 180MAx is its ability to provide consistent performance even under heavy load conditions, a hallmark of Crown's engineering excellence.

One of the standout features of the 180MAx is its advanced circuitry that provides exceptional audio fidelity. Featuring a low-frequency roll-off option, it can be tailored to reduce unwanted bass frequencies, allowing for a cleaner output in environments where echo and acoustics can impact sound quality. The amplifier supports a wide frequency response, ensuring that all nuances of music and vocals are captured crisply.

In terms of connectivity, the Crown 180MAx offers a variety of input options, including balanced XLR and Euroblock terminals. This flexibility allows for easy integration with various audio sources, from professional mixing consoles to simpler audio playback devices. Furthermore, its built-in protection circuitry prevents overheating and short circuits, thus ensuring reliability and longevity of the amplifier in any application.

Crown Audio emphasizes user-friendliness in the design of the 180MAx. The front panel features LED indicators for power, signal, and clipping, providing immediate feedback on the amplifier’s status. The lightweight yet robust construction makes it easy to transport and install, whether in a mobile setup or a permanent venue installation.

The 180MAx also embraces modern technology with its efficient Class D amplifier architecture, which not only reduces power consumption but also minimizes heat generation. This design maximizes performance while maintaining compact dimensions, making it suitable for both rack-mounted and standalone applications.

In conclusion, the Crown Audio 180MAx synthesizes power, reliability, and user-friendly features, making it an exceptional choice for anyone seeking a high-quality audio amplification solution. Its combination of advanced technology, flexibility, and durable design makes it a standout option in the competitive audio market. Whether for live sound reinforcement or fixed installations, the 180MAx continues to deliver superior performance that audio professionals can trust.