JBL Professional CSMA 2120 - Commercial 8x2 Mixer/Amplifier with 2 x 120W, 70/100V and 1U Fanless Design
The JBL Professional CSMA 2120 is a Commercial Series mixer/amplifier designed for fixed installations in retail, hospitality, education, and corporate spaces. It offers eight 120W inputs and two 1U outputs in a fanless , high-efficiency 1U chassis, thanks to Crown DriveCore™ technology. It can drive 4/8 Ω loads and 70V/100V constant voltage systems without an external transformer, and features independent bass and treble equalization for each output channel . The front panel includes illuminated rings for clear operation even in low-light environments.
Connectivity includes balanced mic/line inputs on Euroblock connectors , unbalanced RCA inputs for background music, and speaker outputs on Euroblock connectors , plus an AUX line output for recording/additional zones. It supports 27V phantom power on mic inputs, VOX priority and ducking for announcements (channels 1 and 5), priority mute , configurable output routing , and remote volume control via CSR-V wall panels using RJ-45/Cat5 . Energy Star® certified and GreenEdge™ manufactured, it reduces power consumption and operating costs without sacrificing performance.
Main features
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Power : 2 × 120 W per channel at 4/8 Ω (1 kHz, THD+N ≤ 0.5%); also operates at 70 V / 100 V without a transformer.
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8x2 Mix : 8 mic/line inputs (balanced) + RCA inputs for BGM; AUX line output (5 Vrms at 10 kΩ).
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Controls per output : independent bass and treble + master volume.
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Installation features : switchable 27V phantom power , VOX ducking (ch. 1 and 5), priority mute and configurable output routing .
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Efficient operation : 1U fanless design, DriveCore™ , Energy Star® , automatic sleep mode.
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System connectivity : CSR-V remote volume control via RJ-45/Cat5 ; universal power supply 100–240 V AC .
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Construction and handling : illuminated control rings, Euroblock connectors for inputs/outputs and rack mounting kit included.
Product benefits
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Distribution flexibility : the dual 120W stage allows feeding separate areas at low impedance or 70/100V lines.
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Simple operation for non-technical personnel : clear front controls and illuminated rings.
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Professional integration : VOX and priority for alerts, remote CSR-V and AUX output for expansion or recording.
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Energy saving : high efficiency and Energy Star® certification with quiet, fanless operation.
Use cases
- Restaurants, cafes and retail with background music and microphone announcements.
- Hotels, gyms, schools and universities with multiple audio zones.
- Waiting rooms, offices and customer service centers.
Frequently Asked Questions
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Can I use 4/8 Ω speakers and 70/100 V lines? Yes, the CSMA 2120 works at both low impedance and 70/100 V (do not mix both on the same channel).
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Does it have phantom power? Yes, 27V switchable for the microphone inputs.
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Can the volume be controlled from the wall? Yes, with CSR-V panels connected via RJ-45/Cat5 .
Project description
8×2 mixer/amplifier with 2 × 120 W per channel at 4/8 Ω (THD+N ≤ 0.5%); operating at 70 V / 100 V ; frequency response (4/8 Ω) 20 Hz–20 kHz ±2 dB / (70/100 V) 80 Hz–15 kHz ±2 dB ; SNR > 90 dB (Aw) ; phantom power 27 V ; input sensitivity: mic 3 mVrms , line 775 mVrms , RCA 300 mVrms ; input impedances: mic 400 Ω , line 20 kΩ (balanced), RCA 50 kΩ ; AUX output 5 Vrms/10 kΩ ; Minimum load per channel: 4 Ω (low Z), 40 Ω (70 V), 80 Ω (100 V); power 100–240 VAC, 50/60 Hz ; 1U format; dimensions 43.3 × 436.9 × 303.4 mm (H × W × D); weight 5.5 kg .
