Commercial Audio Series Mixer-Amplifiers

3 Operation

3.1 Powering Up

1.Turn off any equipment connected to the Preamp Output connector.

2.Plug the amplifier’s power cord into a 3-wire grounded AC outlet.

3.Turn down the input volume controls.

4.Turn down the master volume control.

5.Turn on the Power switch. The Power indicator should glow.

6.Turn the input volume controls in use about 3/4 up.

7.Turn up the master volume control(s) until the desired loudness or power level is achieved.

8.Touch up the input levels as needed for music and voice.

9.Turn on any equipment connected to the Preamp Output connector.

If you ever need to make any wiring or installation changes, disconnect the power cord.

3.2 Priority Muting

If you want a microphone’s push-to-talk switch to mute the background music or other input signals, follow this procedure. On the back of the 135MA or 160MA,

1. Turn DIP switch 2 off. Turn DIP switch 3 on.

2 . Connect a push-to-talk mic contact to the Priority Connector (Figure 3.1). Input 1 is the priority input for the amplified output, so Input 1 mutes the other inputs.

3.3 Voice-Activated (VOX) Muting

If you want a voice to mute the background music or other input signals, follow this proce- dure. On the back of the 135MA or 160MA,

1.Turn DIP switch 4 on. Turn DIP switches 2 and 3 off.

2.Talk into the microphone. Adjust the VOX Threshold trim pot on the back of the unit to set how loud the voice must be before muting occurs. It can be set for no muting.

3.4 Music-On-Hold

On the back of the unit, adjust MOH Level Control to obtain the desired level of Music-On- Hold in your phone system.

3.5 Security Knobs

To prevent user tampering with the knobs, you can order the accessory 10-pack of security knobs from your Crown dealer, part no. S-Cover.

1.Pull off an existing knob.

2.Remove the nut.

3.Screw the security knob over the potentiometer shaft. The knob will not rotate.

Input 1

PRIORITY

Mic push-to-talk switch

Figure 3.1 Priority Muting Controls and Connectors

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Operation Manual

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Crown Audio 160MA operation manual Operation

160MA specifications

Crown Audio, a leading manufacturer of professional audio equipment, has made a name for itself with its innovative amplifier designs. Among their extensive lineup, the Crown 160MA and 135MA models stand out as highly regarded solutions for various applications, particularly in commercial audio systems, installations, and even mobile setups.

The Crown 160MA is a 160-watt, 2-channel amplifier that delivers robust performance while ensuring outstanding sound quality. Designed with versatility in mind, it is well-suited for powering speakers in both small venues and larger installations where high-quality audio is required. The amplifier features a built-in mixer with three inputs, allowing users to easily connect multiple audio sources. This feature is particularly beneficial in settings such as community centers, conference rooms, and educational institutions.

On the other hand, the Crown 135MA is a slightly smaller yet equally capable 135-watt, 2-channel amplifier, designed for applications where space may be limited. It retains many of the key features found in the 160MA, offering reliable performance while providing the necessary power for smaller speaker systems. The integrated mixer also accommodates various audio inputs, simplifying connections in various environments.

Both models incorporate advanced technologies that enhance performance and reliability. They utilize Class D amplification, which not only reduces energy consumption but also minimizes heat generation, allowing for a more compact design without sacrificing output power. This makes them ideal for permanent installations where space is a constraint. Additionally, the amplifiers come equipped with comprehensive protection circuitry, safeguarding against potential overloads and thermal issues.

The Crown 160MA and 135MA are also designed with user-friendly controls and indicators, making them accessible for both seasoned audio professionals and newcomers. Their rugged built quality ensures durability in diverse environments, whether being used in commercial spaces, houses of worship, or temporary events.

In summary, the Crown Audio 160MA and 135MA offer a compelling combination of power, sound quality, and versatility. Their innovative features, such as built-in mixing capabilities, efficient Class D technology, and robust protective measures, make them excellent choices for anyone seeking reliable amplification solutions. Whether for small to medium-sized installations or mobile setups, these amplifiers are engineered to deliver exceptional audio performance for any application.