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. Features 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 Specifications 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
