JBL CSMA 280 is a mixer/amplifier with eight mixer-channel inputs and two output channels. It's capable of reaching 80W of peak power with 10W per channel. The CSMA 280 mixer/amp offers 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, the unit includes RJ45 connectors for use with JBL CSR-V in-wall volume controls. This Commercial Series mixer/amplifier features a universal power supply which enables the ability to accept AC voltages from 100 to 240 VAC, 50/60Hz.
8 inputs with 2 outputs of 80W 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
Maximum Output Power: 80 W per channel into 4 Ohms or 8 Ohms, 1 kHz, ≤ 0.5% THD
Insertion Loss: 1 dB maximum for 70 and 100 V outputs
Continuous Power: 10 W per channel
Line Output Level: 5.0 V RMS into 10 kOhms
Input Sensitivity
To obtain full rated power at 8 Ohms (or 5 VRMS to line output)
Mic Input: 3 mV RMS
Line Input: 775 mV RMS
RCA Input: 300 mV RMS
Number of Channels
Input: 8
Output: 2
Frequency Response
Measured at 2.83 V RMS into rated load impedance at any output
4/8 Ohms Output: 20 Hz - 20 kHz, ±2 dB
70 V/100 V Outputs: 80 Hz - 15 kHz ±2 dB
Line Out: 20 Hz - 20 kHz, ±1 dB
Total Harmonic Distortion (THD)
Measured at 2.83 V RMS into rated load impedance at any output
Power Amplifier Output: <0.5%, 20 Hz to 20 kHz
Line Output: 0.05% typical
Signal to Noise Ratio: > 90 dB
Nominal Input Impedance
Mic: 400 Ohms
Line: 20 kOhms (balanced)
RCA: 50 kOhms
Minimum Load Impedance
Low Impedance Output: 4 Ohms
70 V Output: 60 Ohms
100 V Output: 120 Ohms
Crosstalk: -70 dB @ 1 kHz
Controls
Front Panel:
8 x Input level rotary knobs
2 x Output volume-attenuating knobs
1 x Power switch
2 x Bass potentiometers
2 x Treble potentiometers
Rear Panel:
2 x Input-routing dip switches (including phantom and Hi-Z switches)
8 x Mic/Line selector switch
2 x Vox adjustment switches
Indicators
Front Panel:
8 x Input signal presence ring, green
2 x Output volume ring, green
1 x Power switch ring, green/blue
Connectors
Rear Panel:
1 x IEC power input
2 x Aux out connection points
6 x 3-pin euroblock connectors
2 x 5-pin euroblock connectors
6 x Dual RCA input connectors
2 x RJ45, remote volume
Operating Temperature / Humidity: 32 to 95°F / 0 to 35°C, 95% RH (non-condensing)
Storage Temperature: -4 to 185°F / -20 to 85°C
Phantom Power: 27 VDC
AC Input: 100-240 VAC, 50/60 Hz
Dimensions (WxDxH): 17.2 x 11.9 x 1.7" / 436.9 x 302.3 x 43.2 mm
Weight: Approximately 11.9 lb / 5.4 kg
