Designed for commercial and industrial use, theCSMA 1120 Commercial Series Mixer/AmplifierfromJBLis a mixer/amplifier with four mixer-channel inputs and one output channel. It's capable of reaching 120W of peak power with 15W per channel. The unit's front
Designed for commercial and industrial use, theCSMA 1120 Commercial Series Mixer/AmplifierfromJBLis a mixer/amplifier with four mixer-channel inputs and one output channel. 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 a master volume adjustment knob, 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 the mic/line inputs, unbalanced RCA inputs, speaker connections, Hi-Z 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 boasts such features as voice activating ducking (useful for paging over background music), priority muting for channel one’s input, and a sleep mode which automatically powers down the unit when no audible signal has been received for longer than 30 minutes. Also, with an auxiliary output, you may connect to an additional amplifier, though the master volume and tone controls will have no bearing on the resulting signal.
Features
Specifications
| Number of Channels | 4 Input / 1 Output |
| Amplifier Power Rating | 4 Ohms / 8 Ohms: 120 W per Channel (1 kHz, 0.5% THD) 15 W per Channel |
| Load Impedance / Voltage | 4 Ohms (Minimum) 70 V (40 Ohms Minimum) 100 V (80 Ohms Minimum) |
| Frequency Response | Amplifier: 20 Hz to 20 kHz 2 dB (Low-Z) 80 Hz to 15 kHz 2 dB (70/100 V) Line Output: 20 Hz to 20 kHz 1 dB |
| Input Sensitivity | Mic: 3 mVrms Line: 775 mVrms RCA: 300 mVrms |
| I/O Impedance | Mic Input: 400 Ohms Line Input: 20 Kilohms (Balanced) RCA Input: 50 Kilohms |
| Output Level | Line Output: 5 Vrms (10-Kilohm Load) |
| VCA Control | Yes |
| Insertion Loss | 1 dB Maximum |
| SNR | > 90 dB |
| THD | < 0.5% (20 Hz to 20 kHz, Main Output) 0.05% (Line Output) |
| Crosstalk | -70 dB (1 kHz) |
| DSP | Yes |
| EQ | 2-Band |
| Compressor | Yes |
| Limiting | Yes |
| Audio I/O | 1x Block 3-Pin Aux/Line Output 3x Block 3-Pin Line/Mic Input 3x Stereo RCA Unbalanced Input 1x Block 5-Pin Priority Input |
| Digital Audio I/O | No |
| Network I/O | No |
| Other I/O | 1x RJ45 Remote/Volume |
| Speaker Outputs | 1x Block 5-Pin 4-Ohm/8-Ohm/16-Ohm/70 V/100 V Main |
| Number of Module Slots | No |
| USB I/O | No |
| Phantom Power | 27 VDC |
| Media/Memory Card Slot | No |
| AC Input Power | 100 to 240 VAC, 50 / 60 Hz |
| AC Power Connector | 1x IEC |
| AC Outlet | Yes |
| Rackmount Size | 1 RU (1/2-Rack) |
| Operating Temperature | 32 to 95F / 0 to 35C |
| Storage Temperature | -4 to 185F / -20 to 85C |
| Operating Humidity | 0 to 95% () |
| Dimensions | 8.6 x 1.7 x 11.9″ / 21.9 x 4.3 x 30.3cm |
| Weight | 7.1lb / 3.2kg |
Packaging Info
| Package Weight | 10.4 lb |
| Box Dimensions (LxWxH) | 16 x 12 x 5″ |
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