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JBL Commercial Products

CSMA 240/280/2120

The JBL® CSMA series of Mixer-Amplifiers are a professional tool with a sleek industrial look that is designed and built for commercial sound applications. Utilizing Crown’s DriveCore technology enables significantly reduced size and weight – all mixer/amps are highly efficient, fanless and just 1U rack space high. There are both single channel and two channel models with four or eight mixer channels, respectively.

The CSMA mixer/amps offer unmatched ease of use, with a clean, front panel featuring only volume controls for each channel, master volume adjustment, adjustable bass and treble controls and a power switch. All the volume controls are surrounded by an illuminated ring, making them easy to see and operate in darkened environments. The amplifier can drive 8 ohm and 4 ohm loads and can be used with 70V and 100V distributed audio systems without the need for a separate transformer. In addition to balanced mic/line inputs, unbalanced RCA inputs and speaker connections, all units include RJ45 connectors for use with JBL CSR-V in-wall volume controls. All models feature a universal power supply which enables the ability to accept AC voltages from 100 to 240 VAC, 50/60Hz.

JBL Commercial mixer/amps are manufactured under HARMAN’s GreenEdge™ environmental initiative, conforming to lead-free RoHS standards and utilizing recycled copper, aluminum and steel, an energy-saving powder coat finishing process and other environmentally-conscious manufacturing processes. Their highly efficient DriveCore design reduces power consumption and yields much more efficient operation – up to 80 percent more efficient than previous designs. All models carry a 3-year no-fault transferable warranty.

Energy Star Certification

  • 8 inputs with 2 outputs of 40,80, 120-watts of power
  • Ideal for commercial and industrial use
  • Fanless, space-saving 1U design
  • Sleek industrial look with illuminated rings, making them easy to see and operate
  • Euro-block type mic/line input connectors and output connectors
  • Independent Bass and Treble controls for each output channel
  • Supports 70V and 100V distributed audio systems without the need for a separate transformer
  • Remote volume control capability using JBL CSR-V module and standard Ethernet cable
  • Priority muting
  • Configurable output routing
  • Utilizes Crown’s DriveCoreTM technology providing excellent audio performance with high efficiency
  • Manufactured to lead-free ROHS standards, utilizing recycled metals, and using an energy-saving powder coat process
  • Includes rack mounting kit
  • Three-Year, No-Fault, Fully Transferable Warranty completely protects your investment
  • Energy Star® Certified
Output 120W @ 4/8 Ohms (1kHz Power, THD+N<0.5%)
Frequency Response +/- 1dB (@1W into 4 or 8 Ohms)
Load Impedance Stable from 2 - 16 Ohms
Sensitivity 1.4Vrms
Signal to Noise Ratio -weighted
Input Impedance Balanced 20K Ohms/Unbalanced 10K Ohms
Max Input +20dBu Typical
Dimensions 1.7" x 17.2" x 11.9" (43.3 mm x 436.9 mm x 303.4 mm)
Shipping Weight 240: 13.9 lbs (6.3 kg); 280: 15.2 lbs (6.9 kg); 2120: 15.5 lbs (7.0 kg)
  Version Language Size Uploaded
CSMA 240/280/2120 Application Guide-English   en  1.05 MB Jun 12, 2013
CSMA 240/280/2120 Application Guide-Chinese   zh  3.53 MB Dec 19, 2013
CSMA 240/280/2120 Cut Sheet-English   en  1.66 MB Jun 12, 2013
CSMA 240/280/2120 Cut Sheet-Chinese   zh  17.9 MB Jan 13, 2014
CSMA_Thermal_Dissipation_Chart.pdf     42.2 KB Apr 21, 2014
CSMA 240/280/2120 Owner's Manual-Chinese   zh  3.08 MB Dec 19, 2013
CSMA 240/280/2120 Owner's Manual-English   en  2.89 MB Sep 06, 2013
CSMA 240/280/2120 Owner's Manual-Spanish   es  2.5 MB Jan 13, 2014
CSMA 240/280/2120 Owner's Manual-German   de  2.48 MB Jan 13, 2014
JBL Commercial Series Gatefold     1.16 MB Aug 27, 2015
JBL Commercial Brochure     1.24 MB Sep 12, 2018
Declaration Of Conformities
CSMA Series Declaration of Conformity     78.9 KB Aug 27, 2015
System Technology Bulletins
System Technology Bulletin - CSMA 70V     855 KB Aug 27, 2015
System Technology Bulletin - CSMA Input Routing     793 KB Aug 27, 2015
Quick Reference Guides
GreenEdge QRG     1.1 MB Aug 27, 2015
CSMA Quick Reference Guide     673 KB Aug 27, 2015
Application Guides
CSMA Application Guide - Restaurant     858 KB Aug 27, 2015
CSMA Application Guide - Education     578 KB Aug 27, 2015
CSMA Application Guide - Coffee Shop     625 KB Aug 27, 2015

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