Commercial Audio Series Mixer-Amplifiers

2.6 Input Routing

In the 280MA, any input can be assigned to Amp 1, Amp 2 or both. The two DIP switches labeled INPUT ROUTING are used (Figure 2.8). Follow the settings printed on the back panel next to the INPUT ROUTING switch. For example, to send input Channel 3 to Amp 1 and Amp 2, turn on DIP switches 13 and 14.

Figure 2.8 Input Routing DIP Switches

2.7 Phantom Power

To turn on phantom power on all mic inputs, turn on the switch number 7 in the AMP CONFIG DIP switch.

2.8 Priority Muting

A back-panel AMP CONFIG DIP switch (Figure 2.9) can assign Input Ch. 1 or Input Ch. 5 as the priority input for each amplifier output, which tem- porarily mutes the remaining inputs. Muting is activated by contact clo- sures.

For example, suppose you configured Channel 1 as the priority input. Mic 1 is plugged into Channel 1. A press-to-talk switch in Mic 1 is wired to the Priority connector in the mixer-amplifier. When you press the mic switch, all other signals are muted so you can make an announcement on Mic 1.

Figure 2.9 AMP CONFIG DIP Switch

One DIP-switch selection enables Channel 1 as the priority input, which mutes all other inputs to Amp 1. In the 280MA only, another DIP switch selection enables Channel 5 as the priority input, which mutes all other inputs to Amp 2. In the 280MA only, another set of DIP switches enable Channel 1 as the priority input into both Amp 1 and Amp 2, effectively muting any input.

To set the mixer-amplifier for normal mode with no priority:

Set the AMP CONFIG DIP switch as follows:

1ON

2OFF

3OFF

4OFF

5ON

6OFF

To give priority to the Channel-1 input in Amp 1 only: Set the AMP CONFIG DIP switch as follows:

1OFF

2ON

3OFF

4OFF

Also, wire a SPST switch to the PRIORITY connector between COM and CH 1 AMP 1. Close the switch when you want the Channel-1 input to mute all other inputs feeding Amp 1.

To give priority to the Channel-5 input in Amp 2 only:

Set the AMP CONFIG DIP switch as follows:

5OFF

6ON

Also, wire a SPST switch to the PRIORITY connector between COM and CH 5 AMP 2. Close the switch when you want the Channel-5 input to mute all other inputs feeding Amp 2.

To give priority to the Channel-1 input in Amp 1 and Amp 2:

Set the AMP CONFIG DIP switch as follows:

1OFF

2ON

3ON

4ON

Also, wire a SPST switch to the PRIORITY connector between COM and CH1 AMP 1. Close the switch when you want the Channel-1 input to mute all other inputs feeding Amp 1 and Amp 2.

Note: The routing configuration is extremely versatile. Many configura- tions for additional applications not highlighted in this document can be created by examining the signal flow in the block diagram on page 13.

2.9 Link In/Out Switches

These switches (Figure 2.10) affect which signals are heard when another mixer is wired to the mixer-amplifier. One switch is included per amplifier channel.

IN: Any signal applied to the AMP INPUT connector will be mixed with the input signal(s).

OUT: Only the signal from the AMP INPUT connector will appear at the amplifier output.

How to link another mixer to your mixer-amplifier:

Connect the extra mixer’s LINE OUT connector to the mixer-amplifier’s AMP INPUT connector. Set the Link switch to IN.

How to set up Music-On-Hold output:

Connect mixer-amp LINE OUT to Music-On-Hold input on telephone system interface/PBX. Set the LINK SWITCH to IN.

How to set up a processing loop:

Connect mixer-amp LINE OUT to processor input. Connect processor output to mixer-amp AMP INPUT connector. Set the Link switch to OUT.

Figure 2.10

Link In/Out Switches

Operation Manual

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Crown Audio 1160MA Input Routing, Phantom Power, Priority Muting, To give priority to the Channel-5 input in Amp 2 only
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1160MA, 180MA 280MA specifications

Crown Audio, a leader in professional amplifier technology, has introduced a series of high-performance amplifiers that cater to a variety of applications. The 1160MA, 180MA, and 280MA models are designed to deliver exceptional sound quality, reliability, and efficiency, making them ideal for both commercial and residential audio installations.

The 1160MA is a versatile amplifier equipped with a powerful, high-efficiency Class D design that ensures maximum power output with minimal heat generation. Capable of delivering up to 1,160 watts per channel, this model is perfect for driving moderate-sized sound systems, whether in a church, auditorium, or live event. Its 70V and 100V compatibility allows for easy integration into existing audio setups, making it suitable for various applications.

The 180MA boasts a lower power output while retaining the same high-quality audio performance that Crown is renowned for. With 180 watts per channel, it is perfect for smaller installations where space and power consumption are considerations. This amplifier also features built-in processing capabilities, allowing users to fine-tune audio output to suit specific acoustic environments. Its compact design and robust construction make it a reliable choice for both permanent installations and portable setups.

The 280MA stands out with its increased power capacity, offering up to 280 watts per channel. It is designed to handle larger loads, making it ideal for venues that require robust sound reinforcement. Like its counterparts, the 280MA features advanced thermal management technology, ensuring reliable operation even during extended use. The inclusion of both analog and digital inputs provides versatility in connectivity, accommodating traditional audio systems alongside modern digital setups.

All three models share some key features, including an intuitive front-panel LCD for easy monitoring of performance metrics and settings. They also include comprehensive protection circuitry, safeguarding against over-voltage, over-current, and thermal overload, thereby ensuring long-term reliability.

In summary, the Crown Audio 1160MA, 180MA, and 280MA amplifiers excel in delivering high-fidelity audio across a range of applications. With their efficient Class D technology, advanced processing options, and robust construction, these amplifiers represent a union of power and flexibility, catering to audio professionals seeking performance and reliability in their sound systems.
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