General
Model	VLA-240C
Output power	240 W RMS
Maximum output power	360 W
Frequency response	50 Hz – 18.000 Hz (-3 dB)
Total harmonic distortion	<1 % at 1 kHz
MIC signal-to-noise ratio	>70 dB
Signal-to-noise ratio LINE	>80 dB
MIC/LINE inputs	3
LINE inputs	2
TEL-PAGING input	1
REMOTE CONTROL-MIC input	1
AMP-IN	1
REC-OUT	1
PRE-OUT	1
Speaker outputs	100 V / 70 V / 4 Ω
Voltage selection	100 V – 8.9 V
Gong	2- or 4-tone (selectable via jumper)
Siren	constant or rising/falling
Current supply	230 V mains / 24 V DC backup power
Power consumption	630 W
Type of fuse	1/8–1.6 A, Rated: 3.2 A
Rack format	3 HE
Phantom power	Switchable
Height and depth adjusters	per input 1–5
Gain and priority controller	on MIC 1–3 (rear)
Module socket	for media module
Daisy chaining	via AMP-IN/OUT or 0-dB attenuator
Protection circuits	comprehensive
Scope of delivery	VLA-240C amplifier, power cable, instruction manual
Automatic fan

The VLA-240C from RCS Audio-Systems is a central amplifier for professional sound system applications, specifically designed for use in schools, authorities, event venues, or industrial facilities. It enables targeted control of up to five speaker zones as well as an “All-Call” signal, with each zone individually switchable and adjustable in volume. The integrated microphone station control allows remote operation via digital microphone stations, making system control flexible and centralized. The amplifier is designed for use in complex sound systems where precise zone segmentation and reliable signal transmission are required.

Applications

The VLA-240C is suitable for applications requiring central control of multiple speaker zones. It is also appropriate for event venues or industrial facilities where targeted announcements and alarms need to be distributed across different zones. The ability to activate an “All-Call” mode enables immediate, comprehensive announcements, which is crucial in emergency situations.

Functions and Equipment in Detail

The amplifier features three MIC/LINE inputs, each equipped with gain and priority controls. Phantom power is switchable, enabling the use of condenser microphones. Additionally, there are two LINE inputs (RCA) and a TEL-PAGING input with priority function, which can be used for telephone announcements. Inputs 1 to 5 are each equipped with treble and bass controls to adjust the tonal quality according to the source. A FERNBEDIEN-MIC input allows integration of digital microphone stations, which can control the speaker zones.

Technology Explained Simply

The output power is 240 W RMS, with a maximum power of 360 W achievable. The frequency response ranges from 50 Hz to 18,000 Hz (–3 dB), ensuring clear reproduction of speech and music across a wide frequency range. The total harmonic distortion is less than 1 % at 1 kHz, indicating high signal purity. The speaker outputs support voltages of 100 V, 70 V, and 4 Ω, with voltage selection between 100 V and 8.9 V for the five zones and the All-Call mode. The REC-OUT and PRE-OUT outputs allow signal recording or forwarding to other devices. An integrated gong (2- or 4-tone, selectable via jumper) and an electronic siren (constant or rising/fading) extend the functionality for alarm and warning signals.

Compatibility and Accessories

The VLA-240C is compatible with digital VARIO-LINE microphone stations VLM-100A, VLM-105 (for remote control of speaker zones), and VLM-205 (including control of the Digital Text Module DM-10). System expansion is possible via AMP-IN/OUT, allowing additional amplifiers to be cascaded. A module socket enables integration of an optional media module. The amplifiers can also be modified using a 0-dB potentiometer to enable cascading.

Mounting and Installation

The amplifier is housed in a 3-HE enclosure with dimensions 483 mm (W) × 133 mm (H) × 352 mm (D). It is designed for installation in standard 19-inch racks. Power supply is via 230 V AC mains or 24 V DC backup power, with a power consumption of 630 W. The fuse has a rated capacity of 3.2 A. An automatic fan provides cooling for the device, and comprehensive protection circuits safeguard against overload, short-circuit, and other disturbances.

Operational Advantages

Operation of the VLA-240C is particularly efficient due to the integrated microphone station control and flexible zone segmentation. The ability to address individual zones or all zones simultaneously offers high flexibility. The priority function of the TEL-PAGING input ensures important announcements are not interrupted. The combination of mains and backup power supply increases system reliability, especially in critical applications. The integrated alarm functions such as gong and siren expand the application possibilities in security and emergency systems.

Scope of Delivery

The scope of delivery includes the VLA-240C amplifier, a power cable, and the operating instructions.