Designed for commercial and industrial use, the JBL CSMA 2120 Mixer Amplifier for Commercial Usefrom JBL CSMA 2120 Mixer Amplifier for Commercial Useis a mixer/amplifier with eight mixer-channel inputs and two output channels. It's capable of reaching 120W of peak power with 15W per channel. The unit's front panel sports volume controls for each channel, as well as two master volume adjustment knobs, two sets of bass and treble controls, and a power switch. The volume controls are illuminated so they can be seen and operated in darkened environments.

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

This Commercial Series mixer/amplifier boasts such features as voice activating ducking (useful for paging over background music), priority muting for channels one and five, and a sleep mode which automatically powers down the unit when no audible signal has been received for longer than 30 minutes. Also, with two auxiliary outputs, you may connect to an additional amplifier, though the master volume and tone controls will have no bearing on the resulting signal.

For Commercial and Industrial Use    120W into 8 or 4 Ohm Loads    15W Per Channel    8 Input Channels, 2 Output Channel    Usable with 70 & 100V Systems    Euroblock Mic/Line & RCA Inputs    Hi-Z & 27V Phantom Power Switches    Sleep Mode & 2 Auxiliary Outputs    Voice Activated Ducking & Priority Mute

8 inputs with 2 outputs of 120W of power.

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

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 (27 V) can be applied to all mic inputs by turning on Phantom Power within the dip switches.

Voice activated ducking is available on input channel 1 and channel 5. 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.

Channels one and five may be used as priority channels, muting all other channels when pins 4 and 5 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 can be implemented using a CSR-V controller connected via an Ethernet cable to the RJ45 connector on the back panel.

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.

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.

Crown's DriveCore technology
HARMAN's GreenEdge environmental standards

Lead-free RoHS standards, utilizing recycled metals, and using an energy-saving powder coat process
Energy Star certified

Related Questions and Answers

Q: 1. Does this have phantom power?

A: Yes this unit has Phantom Power available on the rear.

Q: 2. Does it come with server mount brackets

A: No, the brackets for the Crown Audio 135MA 3 x 1 35W Commercial Mixer/Amplifier are available separately. The Crown Audio RM1 Rack Mounting Kit for 135MA/160MA (B&H # CRRM1) is for mounting a single amplifier in a rack and the Crown Audio RM2 Rack Mounting Kit for 135MA/160MA (B&H # CRRM2) is for mounting two amps side-by-side.

Q: 3. HI, Is it possible to power my 200 watts speaker using Rane MA3?

A: This amp is 40-watts per channel, so it would not power 200 watt speakers. I would suggest a 200 watt amp, such as the ART SLA-2 - 2-Channel Rackmount Power Amplifier (200W Per Channel at 8 Ohms), BH #ARSLA2.

Q: 4. Is this an original version of the amplifier with the fan speed control? The product image silkscreen seems to indicate this is NOS.

A: No, this is the current version of the Rane MA 3 Three-Channel Power Amplifier which does not offer control of the fan speed. The earlier version did have a two-way switch that allowed you to run the fan at normal or fast speed. According to Rane, it was seldom necessary, if ever, to run the fan at the fast speed, except perhaps in very hot environments when used for heavily compressed music into a demanding load. The downside of running the fan at the fast speed was noise. For that reason the current version does not include fan speed control and provides thermal management with a sealed heat-tunnel design incorporating low velocity forced-air and large aperture openings. This design minimizes the noise usually associated with forced air cooling and eliminates the need for an air filter. Forced air-cooling allows the amplifier to operate reliably in harsh environments and avoid the buildup of heat in unventilated racks.

Q: 5. Does this item come with Rack mount ears?

A: The Quest Commercial M-65 does not include rack ears, but they are available separately (BH #QURKM3565).

Q: 6. What do I check if there is no sound when I pair with bluetooth to my phone?

A: You will first need to verify that your indeed paired correctly. Go to your devices setting, and then Bluetooth, and make sure that you are connected to JBL VMA160. Then, make sure your device's volume is up, start at about 50%. Next, go to the VMA and make sure that input channel "music" is turned up, and that the Master volume (all the way to the right) is also turn up. Start all the way down and slowly increase the Master volume, as not to push too much signal. If you continue to experience issues connecting, please give us a call at 800-606-6969 and a Pro Audio Product Specialist will be happy to assist.

Q: 7. The amp is listed as 120 watts and there are two output channels. So, the amp is 120 watts per channel, correct? In other words, in a 70v application with two separate chains of speakers, each chain would have 120 watts available?

A: This amp is 120 watts per channel. In a 70v setup, each amp is putting out 120 watts.

Q: 8. I have the Ashly 8.2t+ passive speakers. Is this amp comparable for conference room sound reinforcement?

A: Yes the Rane Commercial MA 3 Amplifier is directly compatible with the Ashly AW 8.2T+ Passive 8" 2-Way Installation Speaker with Transformer (White, Pair) for conference room sound reinforcement.

Q: 9. Can this be used with wireless speakers, such as JBL Control X Bluetooth Wireless Speakers?

A: No, the bluetooth function is as an input source, not for streaming out to speakers.

Q: 10. Is it possible to output low impedance on channel one and high impedance on channel two simultaneously?

A: When in stereo mode, the QSC ISA300Ti Commercial Power Amplifier with 70V Transformer operates both outputs independently, so you could use one channel for 8Ohm and the other channel for 70V.