Technical data
Input filter	400 Hz / -3 dB
Power consumption (230 V AC)	At 1/8 load: 3.1 A; at 1/1 load: 7.4 A
Height units	2 HE
Signal-to-noise ratio	better than 100 dB
AC power supply	230 V, 50 - 60 Hz
Output impedance	25 V, 50 V, 100 V
Output power	2x 300/240 W (Program/RMS)
Dimensions (W x H x D)	483 x 88 x 374; 2 HE
Power consumption	1300 W
Total harmonic distortion	better than 0.5%
DC power supply	24 V (emergency power)
Frequency range	35 ~ 20.000 Hz (better -3 dB)
Input sensitivity	0 dB (0.775 V), 66 kOhm, symmetrical
19" rack mounting

The BA-2240DP from RCS Audio-Systems is a professional 2-channel power amplifier designed for use in electrical loudspeaker systems (ELA), particularly in 100 V-, 50 V- and 25 V-technology. It is designed for continuous operation in systems such as building intercom and alarm systems, information and security systems. The amplifier is mountable in a 48,3 cm ( 19 inch )-rack and occupies 2 height units (HE), allowing it to be integrated into standard rack systems. The device dimensions are 483 mm (width) × 88 mm (height) × 374 mm (depth). The power supply is via 230 V AC at 50–60 Hz, supplemented by an emergency power supply via 24 V DC, which increases reliability during operation.

Applications

The amplifier is designed for use in professional ELA systems, particularly in buildings with security and information requirements. The 100 V-technology enables the transmission of audio signals over long distances with minimal losses, making it ideal for large rooms, halls or building complexes. The support for multiple output impedances (25 V, 50 V, 100 V) allows flexible adaptation to different loudspeaker configurations. The fault alarm contacts for all relevant functions enable integrated monitoring and alarm triggering in case of faults, which is important for critical applications such as emergency announcements or fire protection systems.

Functions and Equipment in Detail

The amplifier features two electronically balanced audio inputs for program signals and two additional inputs with priority function, which can be used for mandatory announcements, for example. The input sensitivity is 0 dB (0.775 V) with an input impedance of 66 kOhm, balanced. The input filtering starts at 400 Hz (–3 dB), enabling targeted frequency limitation to suppress unwanted low frequencies. The output power is 2x 300 W (program) / 240 W (RMS) per channel, providing sufficient power for medium-sized to large installations. The power consumption is up to 1300 W, with current consumption of 3.1 A at 1/8 load and 7.4 A at 1/1 load.

Technology Explained Simply

The balancing of inputs and outputs on screw connectors minimizes hum interference caused by ground loops. This improves signal quality and reduces noise. The screw connectors reduce wiring effort, as the need for XLR connectors is eliminated. The LED indicator lights on the front panel provide information on operating status and possible faults, such as overload or short circuit. A Power Remote contact enables remote switching on, even if the local on/off switch is turned off. The Soft-Start circuit suppresses unpleasant switching-on noises. A Ground/Lift switch disconnects the chassis ground from the signal ground to avoid hum loops.

Compatibility and Accessories

The amplifier can be equipped with a Pilotton module (FD-20) to monitor the amplifier’s function. This module enables continuous monitoring of signal transmission and can be used in security systems for fault detection. The amplifiers are equipped with toroidal transformers, ensuring high signal quality and stability. The output impedances (25 V, 50 V, 100 V) are designed for use with corresponding loudspeakers in ELA systems.

Mounting and Installation

The amplifier is designed for 48,3 cm ( 19 inch )-rack mounting and occupies 2 HE. Mounting is done via integrated mounting holes. The screw connectors on the inputs and outputs simplify installation and reduce wiring time. The devices are designed for continuous operation, are short-circuit and no-load safe, and feature appropriate protection devices. The power supply is via 230 V AC, supplemented by a 24 V DC emergency power supply, which ensures the amplifier’s functionality during power failure.

Operational Advantages

The amplifier offers high signal quality with a signal-to-noise ratio better than 100 dB and a distortion factor better than 0.5%, ensuring clear, distortion-free reproduction. The frequency range of 35 Hz to 20,000 Hz (better –3 dB) covers the entire audible range. The fault alarm contacts and the option to integrate a Pilotton module enable reliable monitoring and fault detection. The emergency power supply via 24 V DC increases system availability during power failure. The electronically balanced inputs and the Ground/Lift switch minimize hum loops and improve signal purity.