JBL CSMA 280 - 80W Commercial Mixer/Amplifier with 8 Inputs and 2 Outputs in Black Finish

The JBL Professional CSMA 280 is a powerful and versatile 80W commercial mixer/amplifier designed for a variety of commercial and industrial applications. Whether used in restaurants, educational institutions, fitness centers, or retail stores, the CSMA 280 provides flexible audio mixing and amplification in a compact, efficient package. With eight input channels and two output channels, this mixer/amplifier delivers 80W of peak power with 10W of continuous power per channel, making it ideal for medium-sized installations requiring reliable and clear audio performance.

Built with a fanless, space-saving 1U design, the CSMA 280 offers a sleek industrial look that fits easily into any installation. The front panel features illuminated volume controls for each channel, allowing for easy operation even in low-light environments. In addition to individual volume controls, the unit offers two master volume knobs, two sets of bass and treble controls, and a power switch, all designed to provide full control over your audio system. With its ability to drive both 8-ohm and 4-ohm loads, as well as support 70V and 100V distributed audio systems without the need for a separate transformer, the CSMA 280 offers versatile compatibility for various speaker setups.

The CSMA 280 offers comprehensive connectivity options, including euroblock connectors for mic/line inputs and unbalanced RCA inputs for other audio devices. The rear panel is equipped with dip switches for input routing, allowing users to configure the system according to specific needs. The unit also includes two RJ45 connectors for remote volume control using the JBL CSR-V in-wall volume control module (sold separately), providing an easy way to adjust volume levels in large or multi-zone installations.

Designed for optimal audio performance, the CSMA 280 includes features such as voice-activated ducking, which automatically reduces background music volume during paging or announcements, and priority muting for channels one and five, ensuring that announcements always take precedence. The amplifier also has a sleep mode that automatically powers down the unit after 30 minutes of inactivity, helping to conserve energy when the system is not in use. Additionally, with two auxiliary outputs, users can connect the CSMA 280 to additional amplifiers, although the master volume and tone controls do not affect the auxiliary output signal, offering flexibility in larger setups.

Utilizing Crown's DriveCore technology, the CSMA 280 delivers exceptional audio performance with high efficiency, ensuring clear and distortion-free sound. The unit is manufactured to lead-free ROHS standards, using recycled metals and an energy-saving powder-coat process, making it an environmentally friendly option for your audio needs. It is also Energy Star certified, ensuring energy efficiency for long-term savings. The CSMA 280 comes with a three-year, no-fault, fully transferable warranty, providing complete protection for your investment.

Features

• 80W peak output power with 8 input channels and 2 output channels
• Ideal for commercial and industrial applications such as restaurants, educational institutions, fitness centers, and retail stores
• Fanless, space-saving 1U design with a sleek industrial look
• Illuminated volume controls for easy operation in low-light environments
• Euro-block type mic/line input connectors and unbalanced RCA inputs for flexible audio integration
• 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 (sold separately)
• Priority muting and voice-activated ducking for paging and background music control
• Two auxiliary outputs for connecting additional amplifiers with separate volume and tone controls
• Uses Crown's DriveCore technology for excellent audio performance and high efficiency
• Manufactured to lead-free ROHS standards and environmentally friendly design using recycled metals
• Energy Star certified for efficient power consumption
• Three-year, no-fault, fully transferable warranty for complete protection
• Frequency response: 20 Hz - 20 kHz (+/-2 dB) for 4/8Ω output, 80 Hz - 15 kHz (+/-2 dB) for 70V/100V outputs
• Total harmonic distortion (THD) < 0.5%, 20 Hz - 20 kHz for power amp output
• Signal-to-noise ratio: >90 dB (A-weighted)
• Phantom power: +27 VDC
• Nominal AC line voltages: 100-240V, 50/60 Hz
• Operating temperature: 0°C to 35°C, 95% humidity (non-condensing)
• Dimensions: 17.2 x 11.9 x 1.7 inches
• Net weight: 11.9 lbs, Shipping weight: 15.2 lbs

Specifications

Performance

• Max Output Power per Channel: 80W
• Continuous Power per Channel: 10W
• Insertion Loss (70V & 100V outputs): 1 dB maximum
• Number of Input Channels: 8
• Number of Output Channels: 2
• Line Output Level: 5.0 Vrms into 10 kΩ
• Input Sensitivity:
  • Mic Input: 3 mVrms
  • Line Input: 775 mVrms
  • RCA Input: 300 mVrms
• Frequency Response:
  • 4/8 Ohm Output: 20 Hz - 20 kHz, +/-2 dB
  • 70V/100V Outputs: 80 Hz - 15 kHz, +/-2 dB
  • Line Out: 20 Hz - 20 kHz, +/-1 dB
• Total Harmonic Distortion (THD):
  • Power Amp Output: <0.5%, 20 Hz - 20 kHz
  • Line Output: 0.05% typical
• Signal-to-Noise Ratio: >90 dB (A-weighted)
• Input Impedance (Nominal):
  • Mic: 400 Ω
  • Line: 20 kΩ (balanced)
  • RCA: 50 kΩ
• Phantom Power: +27 VDC
• Crosstalk: <-70 dB
• Nominal AC Line Voltages: 100-240V, 50/60 Hz
• Minimum Load Impedance:
  • Low Impedance Output: 4 Ω
  • 70V Output: 60 Ω
  • 100V Output: 120 Ω
• Operating Temperature/Humidity: 0°C to 35°C @ 95% R.H. (non-condensing)
• Storage Temperature: -20°C to 85°C

Dimensions and Weight

• Net Weight: 11.9 lbs
• Dimensions: Width: 17.2 x 11.9 x 1.7 inches
• Shipping Weight: 15.2 lbs