The Ahuja SUH-25MT PA horn speaker is engineered for seamless integration into commercial, industrial, and institutional distributed sound systems. Operating with a built-in 100V line matching transformer, the unit is fully compatible with standard 100V constant-voltage public address booster amplifiers, zone mixers, and integrated PA mixer-amplifiers. This constant-voltage architecture allows industrial plant engineers to run extensive distributed speaker lines over long distances without experiencing significant power loss across the transmission wiring.
Public Address Amplifier and 100V Line System Compatibility
Designed to interface directly with constant-voltage audio distribution networks, the SUH-25MT connects across standard 100V PA amplifier speaker lines. To ensure proper load calculation and prevent amplifier distortion or overload, system integrators must balance the cumulative wattage of all connected horn speakers against the total rated output capacity of the driving amplifier. The unit features an integrated rotary switch located at the rear of the sealed assembly, enabling field technicians to adjust wattage loading without opening or disassembling the IP66-rated housing.
Transformer Power Taps and Impedance Matrix
The internal line matching transformer provides multiple selectable wattage taps to adapt the acoustic output to local ambient noise levels and zone requirements. The transformer ratings and corresponding load impedances include:
- 25W Tap: 400 Ω line impedance (delivers full 25W RMS output for high-noise industrial areas)
- 20W Tap: 500 Ω line impedance
- 15W Tap: 670 Ω line impedance
- 10W Tap: 1,000 Ω (1 kΩ) line impedance
- 5W Tap: 2,000 Ω (2 kΩ) line impedance (for low-level perimeter or localized voice alerts)
Audio Bandwidth and Paging Infrastructure Compatibility
With an acoustic frequency response spanning 250 Hz to 10,000 Hz and a Sound Pressure Level (SPL) of 108 dB/1W/1m (reaching 122 dB at 25W/1m), the SUH-25MT is acoustically optimized for high-intelligibility voice messaging, emergency mass notification systems (MNS), paging consoles, shift chime alerting, and perimeter security announcements. Its rectangular flare profile (315 mm x 165 mm with a 290 mm depth) offers directional sound propagation, making it compatible with linear perimeter walls, warehouse aisles, transit corridors, and mobile vehicle mount installations.
Cabling and Mechanical Mounting Interoperability
For electrical connections, the speaker comes fitted with a 0.6 m (2 ft) 2-core sheathed audio cable that enters the housing through a factory-sealed, water-tight, tug-proof cable gland. Mechanical integration is supported by an integrated mounting bracket secured with corrosion-resistant stainless steel stand mounting bolts, facilitating rigid installation on unistrut channels, flat masonry, structural steel beams, lighting poles, and vehicle exterior brackets. For long-term field maintenance, the unit is compatible with standard replacement diaphragms designated specifically for the Ahuja SUH-25M / SUH-25MT series, enabling rapid on-site repair without replacing the UV-protected ABS horn flare assembly.
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