The Ahuja UHC-15XT horn speaker (KT reference: KTI14004007UHC5) is engineered for direct integration into commercial and industrial constant-voltage distributed public address (PA) systems. Equipped with an internal 100V line matching transformer, the unit connects directly to standard 100V distributed loudspeaker output lines driven by commercial PA power amplifiers, mixer amplifiers, and high-power booster amplifiers without requiring external step-down transformers.
100V Distributed Line & Multi-Speaker Network Compatibility
In high-area public address, paging, and perimeter safety networks, 100V line distribution allows multiple speakers to be wired in parallel across extended cable distances while mitigating line power loss. The UHC-15XT is fully compatible with any standard 100V constant-voltage commercial amplifier bus, making it suitable for distributed industrial setups across factory floors, perimeter security zones, transit areas, and large parking facilities.
Integrated Rotary Tap Settings & Impedance Matching
The speaker features an integrated multi-tap rotary switch located at the rear of the sealed enclosure. System engineers can adjust the operating wattage and corresponding line impedance to balance zone volume and amplifier load without altering master line voltage.
- 15W Tap: 670 Ω line impedance (Maximum rated RMS power output; 118 dB SPL at 15W/1m)
- 10W Tap: 1,000 Ω (1 kΩ) line impedance
- 5W Tap: 2,000 Ω (2 kΩ) line impedance
- 2.5W Tap: 4,000 Ω (4 kΩ) line impedance
Amplifier Headroom and Line Load Calculation
When engineering multi-speaker 100V public address lines, the total sum of power tapped across all connected UHC-15XT units must not exceed the continuous RMS output rating of the driving 100V amplifier. System designers should maintain an amplifier headroom margin of 10% to 20% above the total cumulative wattage of all tapped speakers on the circuit to prevent signal clipping, thermal overload, or audio distortion during peak voice paging and alarm broadcasts.
| Power Tap Setting | Nominal Impedance | Rated Voltage | SPL Output (at 1 kHz / 1 m) |
|---|---|---|---|
| 15W RMS | 670 Ω | 100V Line | 118 dB |
| 10W | 1 kΩ | 100V Line | Scaled proportional SPL |
| 5W | 2 kΩ | 100V Line | Scaled proportional SPL |
| 2.5W | 4 kΩ | 100V Line | Scaled proportional SPL |
Electrical Interface and Physical Mounting Compatibility
The unit comes factory-fitted with a 0.6 m (2 ft) 2-core sheathed audio cable terminating through an integrated water-tight, tug-proof cable gland. This pigtail interfaces with external industrial junction boxes or field speaker line splitters. For physical integration, the UHC-15XT includes a robust metal mounting bracket secured by stainless steel external mounting bolts. The bracket rotates through 270 degrees, providing broad physical compatibility with flat walls, support columns, structural steel I-beams, and outdoor architectural brackets for targeted acoustic coverage.
