JBL CSMA1120 4 input - 1 x 120W DriveCore Mixer-Amp, Fanless, 4ohm/8ohm/70V/100V

The JBL CSMA 1120 Commercial Series Mixer/Amplifier is a mixer/amplifier with one output channel and four mixer-channel inputs designed professionally for commercial and industrial use. JBL CSMA 1120 is capable of reaching 120W of peak power with 15W per channel. For each channel, the unit's front panel sports is the volume controls, as well as a master volume adjustment bass, treble controls and knob, and a power switch. The volume controls are illuminated making them to be easily recognized and operate in darkened environments.

The amplifier is capable of driving both four and eight Ohm loads, and can be also used with 70V and 100V distributed audio systems without the need for a separate transformer. On this JBL CSMA 1120's back panel you'll find the speaker connections, the mic/line inputs, unbalanced RCA inputs and phantom power switches, and more. The unit is also equipped with a RJ45 connector for use with JBL CSR-V in-wall volume controls (available separately).

This Commercial Series mixer/amplifier, JBL CSMA 1120, it widely known for such features priority muting for channel one's input, a sleep mode which automatically powers down the unit when no audible signal has been received for longer than 30 minutes and voice activating ducking (useful for paging over background music). Also, you may connect to an additional amplifier, with an auxiliary output, though the tone and master volume will have no bearing on the resulting signal.

Channel Modes

Four inputs into one output channel with 120W of power.

Controls

• Independent Bass and Treble controls for each output channel.
• Input level and output volume controls.

Hi-Z Switch

The Hi-Z switch will switch in the built-in output transformer allowing the unit to drive 70V or 100V speaker systems directly when connected to the appropriate output terminals.

Phantom Power

Phantom power (27 V) can be applied to all mic inputs by turning on the phantom power switch.

VOX Function

Voice activated ducking is available on input channel one. The audio input level required to activate ducking is set using the trim pot on the rear panel. Adjusting in the counter-clockwise direction will reduce that level, while the full clockwise setting will disable the VOX function.

Priority Muting

Input Channel one may be used as a priority channel, muting all other channels when pins four and five are shorted using a switch closure. If the amplifier has entered sleep mode due to inactivity, invoking priority will also bring the unit out of sleep and ready for transmitting an announcement.

Remote Volume Control

Remote volume control can be implemented using a CSR-V controller connected via an Ethernet cable to the RJ45 connector on the back panel.

Sleep Mode

This unit is designed to go into sleep mode after approximately 30 minutes operating with no signal at any of the inputs. Return of signal (-40 dBu or 7.75mVRMS) to any input will wake the unit. Also, a switch closure across the priority input pins will return the unit to normal operating mode.

Auxiliary Output

An auxiliary output that you may connect to additional amplifiers is available. The audio signal is the mix of the input channels. Note that the master volume control and tone controls will have no effect on the aux output signal.

Manufacturing

• Crown's DriveCore technology
• HARMAN's GreenEdge environmental standards

Additional Features

• Suitable for commercial and industrial use
• Ideal for commercial and industrial
• Euro-block type mic/line input connectors and output connectors
• Configurable output routing