The Ahuja APA-240 high-power booster amplifier is engineered for seamless integration into industrial, commercial, and institutional public address architectures. To accommodate a diverse range of upstream signal sources, audio distribution topologies, and multi-zone configurations, the amplifier provides versatile input, looping, and load connection interfaces designed according to professional PA engineering standards.
Audio Source and Line Input Compatibility
The APA-240 features multiple input options to match various audio line-level sources, mixer preamplifiers, and distribution consoles:
- Balanced Line Inputs: Incorporates 2 × 1V / 50kΩ balanced inputs terminated via XLR connectors. These are engineered for balanced preamplifier outputs and professional audio matrices, offering high common-mode noise rejection over long cable runs. One of these 1V inputs features an integrated priority override circuit, automatically overriding other input channels for emergency notifications and high-priority paging.
- Unbalanced Auxiliary Input: Features 1 × 200mV / 470kΩ unbalanced line input suitable for standard commercial media players, auxiliary tone generators, and standard unbalanced source gear.
- 100V Distributed Line Input: Includes a dedicated 100V line input designed to receive an amplified 100V audio signal directly from an existing speaker line or master amplifier. This enables slave booster placement across long transmission lines without experiencing line-level signal attenuation.
Amplifier Cascading and Loop-Through Outputs
For large facilities requiring expansion beyond 325W RMS output, the APA-240 provides dedicated loop-through line outputs. These allow engineers to cascade the audio signal to secondary booster units or slave amplifiers without requiring external signal distribution splitters:
- Unbalanced Loop Output: 1 × 200mV / 600Ω output matching standard unbalanced line routing.
- Balanced Loop Outputs: 2 × 1V / 1kΩ outputs designed for cascading into additional balanced power amplifiers.
Loudspeaker Load and Distribution Compatibility
The output stage of the APA-240 is designed to drive both low-impedance direct loads and constant-voltage distributed speaker lines:
- Low-Impedance Taps (4Ω and 8Ω): Compatible with direct low-impedance loudspeaker arrays, near-field industrial monitors, and standard low-impedance cabinet enclosures.
- Constant-Voltage High-Impedance Lines (70V and 100V): Compatible with multi-speaker distributed networks fitted with step-down line matching transformers, such as ceiling speakers, wall-mount column speakers, and paging horn arrays in large facilities like hospitals, schools, commercial complexes, and industrial sites.
Rack and Electrical Power Compatibility
The amplifier is built in a 19-inch standard rack-mountable chassis (dimensions: W485 × H142 × D405 mm; weight: 20.6 kg), allowing installation in standard 19-inch equipment racks or standalone tabletop operation. It operates on AC mains (220–240V 50/60Hz, 600VA consumption) and supports instant automatic transfer to an external DC 24V backup power source (operable via 2 × 12V Car Battery (they are not included), consuming 7A) to ensure uninterrupted public address operation during mains outages.
