RCS Audio-Systems BA-480DP 1-channel power amplifier (1x480 W sine, 2 U), prepared for FD-20 content_copy

The BA-480DP from RCS Audio-Systems is a professional, fully monitorable 2-channel power amplifier in 19-inch format (3 U), specifically designed for use in ELA systems (Electronic Voice Alarm systems) with 100 V-, 50 V- or 25 V-technology. It offers an output power of 2 × 720 W (programme) or 2 × 480 W (RMS), making it suitable for large public address and voice alarm systems. The amplifier architecture is based on high-quality components, including a powerful toroidal transformer, ensuring long-term operational reliability and high dependability. The amplifier is fully short-circuit and no-load protected and features comprehensive protection and fault alarm functions required for safety-critical applications.

Applications

The BA-480DP is intended for use in large, safety-critical facilities such as airports, railway stations, shopping centres or administrative buildings. The integrated monitoring function enables continuous control of the operating status, allowing failures or malfunctions to be detected early. Use in ELA systems requires high reliability and clear signal prioritisation, which is supported by the amplifier’s special features.

Functions and Equipment in Detail

Each channel features two input pairs: one for normal programme input and one for priority mandatory announcement input. This configuration enables redundant or prioritised signal processing, which is essential for critical alarm applications. Signal input is via electronically balanced inputs on screw terminals, reducing installation effort and minimising hum interference. Optionally, a Pilotton module FD-20 can be integrated per channel, enabling automatic function monitoring.

Technology Explained Simply

The amplifier operates with an output impedance of 25 V, 50 V or 100 V, allowing adaptation to various public address systems. The frequency response is 35 Hz to 20,000 Hz (better than -3 dB), ensuring clear and wideband reproduction of speech and music. The input sensitivity is 0 dB (0.775 V) with an input impedance of 60 kOhm, balanced. The signal-to-noise ratio is > 100 dB, ensuring clean audio reproduction. The total harmonic distortion (THD) is < 0.4% at 1 kHz, indicating high signal quality. An optional input low-pass filter at 400 Hz / -3 dB reduces unwanted low frequencies, which can be disruptive in voice alarm applications.

Compatibility and Accessories

The BA-480DP is compatible with the optional Pilotton module FD-20, enabling automatic function monitoring. The amplifiers are designed for integration into existing ELA systems and can be remotely activated via the Power-Remote contact. Power supply is via AC 220–230 V, 50–60 Hz, with an optional backup power supply via DC 24 V.

Mounting and Installation

The amplifier is in 19-inch format (3 U) and can be mounted in standard racks. Dimensions are 483 mm (W) × 88 mm (H) × 374 mm (D). Mounting is via screw terminals, ensuring a secure and durable connection. The delivery includes the device, a power cable and an operating manual.

Operational Advantages

The BA-480DP offers high operational reliability through soft-start, switch-on noise suppression and status LEDs for operational and fault indication. The integrated fault alarm contacts allow direct connection to monitoring systems. The combination of high power, high signal quality and comprehensive monitoring makes the amplifier a reliable solution for safety-critical public address systems.

Delivery Contents

The delivery includes the BA-480DP power amplifier, a power cable and an operating manual.

General
Product type	2-channel power amplifier, fully monitorable
Output power	2 × 720 W (Programme)
Output impedance	25 V / 50 V / 100 V
Frequency response	35 – 20.000 Hz (better than -3 dB)
Input sensitivity	0 dB (0.775 V)
Input impedance	60 kOhm
Signal-to-noise ratio	> 100 dB
Total harmonic distortion (THD) @ 1 kHz	< 0,4 %
Input low-pass filter	400 Hz / -3 dB (switchable)
Power consumption	2.520 W
Power consumption @ 230 V, 1/8 load	3,1 A
Power consumption @ 230 V, full load	11,8 A
AC power supply	220–230 V, 50–60 Hz
DC power supply	24 V (emergency power supply)
Mounting format	19˝, 3 HE
Inputs per channel	2 (Program + Priority)
Compatibility	FD-20 Pilotton module (optional)
Inputs	Electronically balanced, screw terminals
Soft-start
Inrush noise suppression
Power remote function
Status LEDs
Fault alarm contacts

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