General
Output power	480 W RMS
Channels	1
Output impedance	100 V
Frequency response	35 – 20.000 Hz
Signal-to-noise ratio	> 100 dB
Input low-pass filter	400 Hz
Total harmonic distortion	< 1 %
Input sensitivity	0 dBu
Input impedance	60 kOhm
Operating voltage	230 V AC
Backup power supply	24 V DC
Mounting format	19 inch, 2 U
Power consumption full load	11,8 A
Input type	Symmetric
Monitoring	Prepared for FD-20
Soft-start
Power remote
Status LEDs
Fault alarm contacts

The RCS Audio-Systems BA-480DP is a professional, monitored power amplifier in 19-inch format, specifically designed for use in electronic voice alarm systems (ELA). The device serves as a final amplifier in sound systems and is designed for operation with high-voltage lines in 100-V technology. It features an output power of 480 W RMS and is therefore suitable for medium-sized to large installations requiring reliable and continuous signal transmission.

Applications

The amplifier is intended for safety-critical applications, such as those common in airports, train stations, shopping centres, or administrative buildings. Integration into ELA systems enables the transmission of voice alarms, mandatory announcements, and other important information. The preparation for the FD-20 pilot tone module allows for automatic function monitoring, increasing system availability.

Functions and equipment in detail

The BA-480DP offers a single channel with an output power of 480 W RMS. Signal input is via electronically balanced inputs on screw connectors, simplifying installation and reducing hum interference. The amplifier is equipped with a switchable input low-pass filter (400 Hz / -3 dB) that suppresses unwanted low frequencies. The input sensitivity is 0 dB (0.775 V) with an impedance of 60 kOhm. The operating voltage is 230 V AC (50–60 Hz), supplemented by an emergency power supply via 24 V DC.

Technology explained simply

The amplifier is designed for continuous operation and features a powerful toroidal transformer, ensuring stable and distortion-free signal transmission. The harmonic distortion figure of less than 1 % at 1 kHz indicates high signal quality. The frequency response of 35–20,000 Hz (better than -3 dB) ensures broad audio reproduction. The power supply is dimensioned to allow the amplifier to operate reliably even under full load (11.8 A). The power consumption is 2,520 W.

Compatibility and accessories

The amplifier is prepared for integration of the optional FD-20 pilot tone module, enabling automatic function monitoring. The use of fault alarm contacts for all safety-relevant functions supports integration into higher-level monitoring systems. The power supply via 24 V DC allows operation during power failure, which is essential for ELA systems.

Mounting and installation

The device is in 19-inch format (2 HE) with dimensions 483 × 88 × 374 mm. Mounting is done in standard 19-inch racks. The screw connectors for inputs and outputs simplify installation and ensure a secure connection. Delivery includes a power cable and an operating manual.

Advantages in operation

The BA-480DP offers high reliability through short-circuit and no-load protection, as well as comprehensive fault alarm functions. The soft-start function and switch-on noise suppression ensure disturbance-free operation. The power remote function enables remote activation of the device, which is advantageous in automated systems. The status LEDs provide a quick overview of the operating and fault status.