JBL Professional CSA-2300Z - 2 x 300W Commercial Amplifier with Integrated 70/100V, CSR-V Control and RS-232 (2U)
The JBL Professional CSA-2300Z is a two-channel installation amplifier that delivers 300W per channel into both 4/8 Ω and 70V/100V networks thanks to its integrated output transformer. Designed for commercial sound reinforcement and public address systems, it offers easy operation with independent bass and treble controls per channel (±12dB) and illuminated front-panel rings. It features balanced Euroblock and RCA inputs , barrier strip speaker terminals , and two RJ-45 ports (one per channel) for CSR-V remote volume control . For advanced integration, the Channel 1 RJ-45 connector allows for RS-232 control (volume, mute, and sleep mode). Its 2U form factor, sleep mode with disable function, and the efficiency of the DriveCore™ platform ensure reliable performance and low power consumption in 24/7 installations.
Main features
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Power : 2 × 300 W (1 kHz, ≤ 0.5% THD) into 4/8 Ω or 70/100 V with insertion loss ≤ 1 dB.
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Output switching : low impedance or Hi-Z 70/100 V ; in Hi-Z mode, an automatic 70 Hz high-pass filter is activated.
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Inputs : Balanced Euroblock (20 kΩ) and RCA (10 kΩ, mono sum) per channel.
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Speaker outputs : professional barrier strip for 4/8 Ω and dedicated 70V/100V/COM terminals.
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Tone control per channel : Bass ±12 dB @100 Hz and Treble ±12 dB @10 kHz .
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Wall remote : 2 × RJ-45 (one per channel) for CSR-V panel with Cat 5 cable.
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RS-232 control : commands for mute , sleep and volume (via RJ-45 of Channel 1).
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Sleep mode with deactivation option; efficient DriveCore™ design.
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Physical format : 2U , 432 × 274 × 89 mm (W × D × H); net weight 8.05 kg .
Audio features
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Frequency response (8 Ω) : 20 Hz – 20 kHz (±1 dB).
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THD : < 0.5% (20 Hz–20 kHz at nominal power).
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Signal-to-noise ratio : > 97 dB (A-weighted, 22 kHz BW).
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Input sensitivity (8 Ω) : balanced 0.775 Vrms ; RCA 0.300 Vrms . Max. input level : +22 dBu.
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Crosstalk : < −70 dB (Aw, 1 kHz, nominal power ref.).
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Minimum loads : 4 Ω (low Z) · 12 Ω (70 V) · 24 Ω (100 V).
Product benefits
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One amplifier, multiple scenarios : works at 4/8 Ω or 70/100 V without external accessories.
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Intuitive operation : basic equalization per channel and illuminated rings for quick status reading.
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Local and remote control : volume from wall with CSR-V and automation/monitoring via RS-232 .
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Efficiency and continuity : installation design with Sleep mode and highly reliable DriveCore™ electronics.
Use cases
- Retail, hospitality and catering: background music and zone announcements on 70/100 V lines.
- Education and corporate: small auditoriums, classrooms and common areas with wall-mounted level control.
- Sports centers, museums and public buildings: distributed systems with high coverage and low complexity.
Frequently Asked Questions
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How do I select 70/100 V? Activate the Hi-Z switch and connect to the 70 V/100 V and COM terminals; a 70 Hz HPF is automatically applied.
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Is there a wall-mounted remote control? Yes, with CSR-V (one per channel if desired) via RJ-45 and Cat 5 cable.
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What is RS-232 used for? It allows you to control volume, mute, and sleep mode from external systems (via RJ-45 on Channel 1).
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Can I mix low impedance and 70/100 V on the same output? No. Each channel must operate either at low impedance or high impedance.
Project description
JBL CSA-2300Z Commercial Amplifier: 2 × 300 W (1 kHz, ≤ 0.5% THD) into 4/8 Ω or 70/100 V (loss ≤ 1 dB); response (8 Ω) 20 Hz–20 kHz (±1 dB); SNR > 97 dB (A); input sensitivity 0.775 Vrms (balanced) / 0.300 Vrms (RCA); +22 dBu max. input; crosstalk < −70 dB ; tone controls per channel Bass ±12 dB @100 Hz , Treble ±12 dB @10 kHz ; Euroblock and RCA inputs per channel; barrier strip outputs (4/8 Ω, 70/100 V, COM); Minimum loads 4 Ω / 12 Ω / 24 Ω (low Z/70 V/100 V); 2 × RJ-45 for CSR-V ; Channel 1 RS-232 via RJ-45; Sleep mode with disable; 432 × 274 × 89 mm (W × D × H), weight 8.05 kg (shipping 9.35 kg ), 2U.
