Dynacord SL 900 - 2-channel 900W power amplifier

Dynacord SL 900 – 2-channel 900W power amplifier

The Dynacord SL 900 is a professional 2-channel Class AB power amplifier designed for live sound reinforcement and installed systems. It delivers impressive power output in stereo mode of 2 x 270 W into 8 Ω, 2 x 450 W into 4 Ω, and 2 x 650 W into 2 Ω (THD 1%, 1 kHz), and in bridge mode of 1 x 900 W into 8 Ω or 1 x 1,300 W into 4 Ω. Its frequency response of 10 Hz to 40 kHz (±1 dB), gain of 32 dB, and input sensitivity of +2.2 dBu ensure precise and dynamic reproduction. The front panel features gain control and LED indicators for output level, limiter, protection, and power, while safety circuitry protects against overheating, overload, short circuit, back EMF, current spikes, HF and DC outputs, and features soft-start to preserve your speakers.

Main features

• Output topology: Class AB.
• Stereo power (THD 1%, 1 kHz): 2 × 270 W (8 Ω); 2 × 450 W (4 Ω); 2 × 650W (2Ω).
• Bridge power (THD 1%, 1 kHz): 1 × 900 W (8 Ω); 1 × 1 300 W (4 Ω).
• Frequency response: 10 Hz–40 kHz (±1 dB).
• Gain: 32 dB.
• Input sensitivity: +2.2 dBu.
• Maximum output RMS voltage: 55.3 V.
• Consumption: 550 W (⅛ of maximum output at 4 Ω).
• Connectivity: Balanced 3-pin XLR inputs and outputs; NL4 Speakon outputs.
• Protections: Temperature, overload, short circuit, EMF, current surges, HF, DC and soft start.
• Rack format: 19″ × 2 U; dimensions 483 × 88.1 × 421.5 mm; weight 12.6 kg.

Product benefits

• High reliability: Protection circuits and Class AB topology ensure stable operation in any environment.
• Versatility of use: Compatible with loads from 2 Ω to 8 Ω, ideal for various professional speakers.
• Immediate monitoring: Front LEDs for output level, limiter and protection status.
• Professional installation: Standard 19″ rack format and XLR/Speakon connectors for quick assembly.
• Wide frequency coverage: From 10 Hz to 40 kHz for deep bass and crystal-clear highs.

Use cases

• Sound reinforcement for concerts, tours and festivals.
• Fixed installations in auditoriums, theaters and conference rooms.
• Sound system for sporting events and corporate AV.
• Public address systems in educational and cultural spaces.

Frequently Asked Questions

• Is it stable at low impedances? Yes, the SL 900 maintains stability down to 2 Ω in stereo mode.
• Does it require configuration software? It doesn't include a DSP; all settings are made from the front panel.
• What type of ventilation does it use? Front-to-rear ventilation with automatic speed control.
• Can it be used outdoors? Its durable chassis allows for indoor and semi-outdoor use, avoiding exposure to direct rain.

Description for projects

2-channel Class AB power amplifier, 2 × 270–650 W stereo (8–2 Ω), 1 × 900–1 300 W bridged (8–4 Ω), 10 Hz–40 kHz, gain 32 dB, sensitivity +2.2 dBu, consumption 550 W, 19″ rack 2 U, XLR/Speakon, 12.6 kg.