The NDA-1000 A is a high-performance, network-capable digital power amplifier with integrated emergency power supply, certified according to EN 54-16 and EN 54-4. Engineered for professional voice alarm systems (VAS), it ensures robust and reliable audio amplification, even during emergency operation.

With its fully digital system architecture, the NDA-1000 A offers outstanding efficiency and audio clarity. It features two independent output channels delivering 500 W RMS each at 100 V – ideal for large-scale voice evacuation and announcement systems. The unit includes three redundant power supplies to guarantee maximum operational reliability.

An integrated battery charger with temperature sensor and EN 54-4 compliance enables operation with shared battery packs across multiple amplifiers. Additionally, the unit provides a 24 V DC auxiliary output for powering external components.

The amplifier monitors mains power faults, battery status (including internal resistance checks), and all audio output channels. Via AMP-Link protocol, it seamlessly integrates with the VARES-2000 system for full remote control and diagnostics.

Technical Specifications:

General:

• Product type: Digital network power amplifier
• Standards: Compliant with EN 54-16 and EN 54-4
• Housing: 48,3 cm ( 19 inch ) rack-mount, 2U
• Weight: approx. 16.5 kg
• Dimensions (W x H x D): 483 x 88.5 x 350 mm

Audio:

• Output power: 2x 720 W (program) / 2x 500 W (RMS)
• Output voltage: 100 V
• Frequency range: 3 – 35,000 Hz (–3 dB)
• Signal-to-noise ratio: > 90 dB
• Total harmonic distortion (1 kHz): < 0.1 %
• Crosstalk (20 Hz – 20 kHz): < –100 dB
• Input sensitivity: max. 775 mV / 0 dBu (balanced)
• Inputs: 2x BGM, 1x AUX (balanced analog)

Power Supply:

• Max. power consumption: 1,350 W
• Inrush current: max. 6 A @ 230 V AC
• DC current consumption: max. 45 A @ 24 V DC
• Idle consumption: 24 W active / 0.9 W standby
• Idle current (DC): 1 A active / 34 mA standby
• Efficiency: 89 % @ 230 V AC / 93 % @ 24 V DC

Emergency Power & Charging:

• Charging voltage: max. 27.9 V DC
• Charging current: max. 4 A
• DC output for external devices: max. 60 W / 2 A
• Battery connection for shared backup power across multiple amplifiers

Indicators & Interfaces:

• Status indicators: Power, Link, Battery, Charger, Channel A/B SIG/CLIP faults
• Network ports: 2x global AMP-Link connections