The Ahuja UHC-25XT public address horn speaker is engineered for rapid deployment across commercial 100V distributed audio networks and harsh industrial environments. Proper installation ensures that the unit maintains its IP66 ingress protection rating against dust and high-pressure water jets while delivering optimal acoustic output across its 250 Hz to 10,000 Hz operating frequency range.
Mechanical Mounting and 270-Degree Bracket Adjustment
The UHC-25XT features a heavy-duty metal mounting bracket designed for secure attachment to structural uprights, poles, industrial trusses, or masonry walls. The bracket assembly enables 270-degree rotation, allowing installers to precisely aim sound projection toward target listening zones without dismounting the fixture. Corrosion-resistant stainless steel external stand mounting bolts lock the 2.34 kg assembly securely in place once the acoustic alignment is finalized.
With physical dimensions of ø274 mm (bell diameter) by 310 mm (length), installers must allow sufficient radial clearance around the UV-protected ABS plastic bell and reflector housing to accommodate bracket articulation and vibration damping.
100V Line Power Tap and Impedance Selection
The unit incorporates an internal 100V line-matching transformer that permits multiple wattage settings to match acoustic zone requirements and amplifier power budgets. Power adjustments are executed via an external rotary switch located at the rear of the sealed assembly. This external switch enables field changes without opening the weather-sealed enclosure, preserving internal component integrity.
| Selected Power Tap (100V Line) | Transformer Primary Impedance | Acoustic Output Level (SPL @ 1 kHz) |
|---|---|---|
| 25W (RMS Rated / 38W Max) | 400 Ω | 122 dB at 1 m |
| 20W | 500 Ω | 121 dB at 1 m |
| 15W | 670 Ω | 119.8 dB at 1 m |
| 10W | 1000 Ω (1 kΩ) | 118 dB at 1 m |
| 5W | 2000 Ω (2 kΩ) | 115 dB at 1 m |
Electrical Wiring and Sealed Cable Termination
The UHC-25XT comes pre-fitted with a 0.6-metre (2-foot) 2-core sheathed speaker cable entering the driver housing through an integrated water-tight, tug-proof cable gland. For field wiring extensions in outdoor or plant announcement setups, connect the 2-core leads into an IP-rated external junction box using proper polarities to maintain phase alignment across multiple speaker arrays.
- Long-Distance Distributed Audio: The integrated 100V transformer design prevents signal and voltage attenuation over extended cable runs, making it suitable for perimeter paging, transit hubs, and industrial facilities.
- Thermal Reliability: The internal voice coil is precision-wound on an aluminium bobbin to ensure continuous heat dissipation during continuous 25W RMS operation.
- Safety Standard Compliance: The electrical design conforms to European Union regulations under the Low Voltage Directive standard EN 60065.
