JBL Professional CSA-280Z - 2 x 80W, 70/100V Low Impedance Commercial Amplifier (1U Fanless, CSR-V Remote Control)
The JBL Professional CSA-280Z is a high-performance stereo amplifier for commercial installations, delivering 2 x 80 W per channel. Thanks to Crown DriveCore™ technology and its fanless 1U design , it offers 24/7 reliability with low power consumption and quiet operation. It features integrated 70/100 V outputs (with an automatic 70 Hz high-pass filter when Hi-Z is activated) and can also operate at low impedance (4/8 Ω) . Each channel has bass and treble controls and balanced (Euroblock) and stereo RCA input connections that can be summed to mono. For easy control by non-technical personnel, each output can be controlled from the wall using CSR-V panels connected via RJ-45 . Its universal 100–240 V~ power supply and Energy Star® certification facilitate integration into energy-efficient projects.
Main features
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2 × 80 W per channel (1 kHz, ≤ 0.5% THD) with built-in 70/100 V or 4/8 Ω low Z outputs.
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Hi-Z switch : enables 70/100 V and activates HPF 70 Hz to protect distributed lines.
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Inputs per channel : Balanced Euroblock (20 kΩ) and RCA (50 kΩ), with mono summing of stereo signal in RCA.
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Wall control : two RJ-45 connectors, one for each output, compatible with CSR-V .
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Tone controls per channel: Bass ±10 dB @100 Hz and Treble ±10 dB @10 kHz .
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Performance : Frequency response 20 Hz–20 kHz (±0.5 dB, 8 Ω), SNR > 100 dB (Aw), THD < 0.5% , insertion loss at 70/100 V ≤ 1 dB.
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Automatic sleep mode after ~2 hours without signal (switch to disable it).
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Compact format : 1U ( 43.3 × 218.5 × 303.4 mm ), 4.0 kg weight; rack mounting kit included.
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Energy Star® and efficient DriveCore™ design (GreenEdge).
Product benefits
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Installation versatility : a single unit covers low Z and 70/100 V networks, simplifying inventory and deployment.
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Simple operation : illuminated rings, basic controls and remote volume option per zone with CSR-V.
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Clean and consistent sound : SNR > 100 dB and tone control per channel to adapt the curve to each area.
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Efficiency and silence : low-power fanless platform for discreet operation in open environments.
Use cases
- Shops, restaurants, hotels: background music by zone and announcements.
- Education and offices: corridors, classrooms and receptions with local level control.
- Fitness centers, museums and public spaces: extensive 70/100 V lines with 24/7 reliability.
Frequently Asked Questions
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How do I activate 70/100 V? Switch the Hi-Z selector and connect to the 70 V/100 V and COM terminals; the HPF 70 Hz is automatically applied.
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Can I use both low Z and 70/100 V on the same channel? No. Each output must operate either at low Z or high Z.
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Which wall remote is compatible? JBL CSR-V . The CSA-280Z has two RJ-45 ports , one for each output.
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What is the input sensitivity? 1.4 Vrms (8 Ω) for rated power.
Project description
JBL CSA-280Z Amplifier: 2 × 80 W (1 kHz, ≤ 0.5% THD); 4/8 Ω or 70/100 V outputs (loss ≤ 1 dB), Hi-Z with HPF 70 Hz ; sensitivity 1.4 Vrms (8 Ω); SNR > 100 dB (Aw); THD < 0.5%; minimum impedances 4 Ω (low Z), 70 V: 60 Ω , 100 V: 120 Ω ; inputs per channel : balanced Euroblock (20 kΩ) and RCA (50 kΩ), max. level +22 dBu; crosstalk > 70 dB; Bass ±10 dB @100 Hz and Treble ±10 dB @10 kHz controls ; 2 × RJ-45 remotes for CSR-V; AC 100–240 V~, 50/60 Hz; dimensions 43.3 × 218.5 × 303.4 mm; net weight 4.0 kg; shipping weight 5.3 kg; 1U fanless design, Energy Star® .
