Ahuja AU 50XT 50W 100V PA Driver Unit with die-cast aluminium acoustic head

PA Driver Unit Ahuja AU 50XT 50W 100V

KTI1400401AU0XT

Product Description

The Ahuja AU-50XT is a heavy-duty 50W Public Address driver unit engineered with a built-in 100V line matching transformer and rotary power tap selector for reliable outdoor sound reinforcement and industrial paging.

Brand: Ahuja
Model: AU-50XT
Rated Power: 50W RMS / 70W Max
Impedance / Power Taps (100V Line): 200Ω (50W), 250Ω (40W), 500Ω (20W), 1kΩ (10W), 2kΩ (5W)
Frequency Response: 160 Hz – 7,000 Hz
Sound Pressure Level (SPL at 1 kHz): 113 dB/1W/1m, 130 dB/50W/1m
Throat Coupling: Standard 1-3/8” - 18TPI (Throat Couple No. 1)
Construction Material: Die-cast aluminium acoustic head (flange) with aluminium bobbin voice coil
Operating Temperature Range: -30°C to +70°C
Ingress Protection: IP66 rated when mounted to compatible reflex horn (complies with EN 60529)

KTI1400401AU0XT

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Product Details
Available Brands	Ahuja
Unit	Numbers
HSN Code	85319000
Weight	2.47 kg
Dimension	L 15 x W 15 x H 14.3 cm cm ft in m
Warranty	12 Months No-Onsite Warranty
Tags/categories	Automation PA Solutions Speakers, Horn Speakers

Usually dispatched within 6 days

About this product .

The Ahuja AU-50XT is a professional 50-watt public address compression driver unit designed for high-efficiency acoustic projection in distributed commercial and industrial audio installations. It integrates a dedicated multi-tap 100V line matching transformer that enables simple integration across constant-voltage speaker networks without excessive line loss over long cable runs.
Constructed with a rugged die-cast aluminium acoustic head and flange, the driver delivers structural durability in harsh industrial operating environments. The internal voice coil is precision-wound on an aluminium bobbin, ensuring optimal heat dissipation during continuous high-power operation across a wide operating temperature envelope of -30°C to +70°C.
A selectable rotary switch on the rear housing provides five distinct power tap settings on a 100V line: 50W (200Ω), 40W (250Ω), 20W (500Ω), 10W (1kΩ), and 5W (2kΩ). This flexibility permits precise acoustic balancing across paging zones with varying ambient noise levels.
Delivering high acoustic sensitivity with a sound pressure level of 113 dB at 1W/1m and up to 130 dB at full 50W rated output, the unit ensures clear voice intelligibility over a frequency bandwidth of 160 Hz to 7,000 Hz.
The driver features a standard 1-3/8” - 18TPI threaded throat coupling (Throat Couple No. 1), making it fully compatible with industry-standard reflex horns and acoustic trumpets. When properly coupled to a reflex horn, the assembly meets EN 60529 standards with an IP66 ingress protection rating against dust penetration and high-pressure water jets.

Product Information .

Worship Places Industries, Factories Shopping Malls, Showrooms Public Roads Conference Rooms Auditorium Emergency Services

Mechanical Throat Coupling and 100V Line System Compatibility

The Ahuja AU-50XT Public Address driver unit is engineered for integration into high-voltage distributed paging networks and industrial audio projection systems. Designed to interface seamlessly with standardized acoustic horns and commercial 100V line amplifiers, this driver provides reliable power tap matching, robust mechanical coupling, and certified environmental protection across industrial installations.

Mechanical Reflex Horn Coupling Standard

Mechanical mounting is facilitated through industry-standard throat coupling specifications. The acoustic head flange, fabricated from die-cast aluminium, integrates standard 1-3/8” - 18 TPI threading (Throat Couple No. 1). This universal thread standard ensures direct, rigid mechanical compatibility with industrial PA reflex horns, trumpets, and acoustic projector flares designed around the No. 1 couple profile.

When mounted to a matching reflex horn, the assembly achieves an IP66 ingress protection rating in accordance with standard EN 60529. This sealed configuration completely blocks dust ingress and resists powerful high-pressure water jets, ensuring operational durability in outdoor, marine, and washdown-prone industrial environments.

100V Constant-Voltage Audio Line Compatibility

The AU-50XT includes an integrated 100V line matching transformer that enables direct compatibility with commercial 100V constant-voltage public address booster amplifiers and mixer amplifiers. Utilizing constant-voltage architecture allows system designers to deploy long cable runs across industrial plants, perimeter walls, and multi-building facilities with minimized copper losses and simplified parallel speaker wiring.

Selection of load impedances and operating wattages is managed via an integrated rotary switch positioned on the rear housing of the unit. This mechanism enables precise acoustic balancing across distributed horn arrays without requiring external transformer hardware.

Selectable Power Taps and Impedance Matrix

Operating Voltage	Transformer Impedance	Power Tap Setting	Acoustic SPL @ 1m (Rated Power)
100V Line	200 Ω	50W RMS (Max 70W handling)	130 dB
100V Line	250 Ω	40W	Proportional SPL
100V Line	500 Ω	20W	Proportional SPL
100V Line	1 kΩ (1000 Ω)	10W	Proportional SPL
100V Line	2 kΩ (2000 Ω)	5W	Proportional SPL

Acoustic and Environmental Operating Boundaries

The unit features a voice coil precision-wound on an aluminium bobbin to maximize thermal dissipation during high-output duty cycles. System designers must ensure operational alignment with the unit’s frequency response range of 160 Hz to 7,000 Hz, making it fully compatible with voice paging, emergency notification, and siren tone generators.

With an acoustic sensitivity of 113 dB/1W/1m (scaling up to 130 dB at 50W RMS) and an operating thermal range spanning -30°C to +70°C, the AU-50XT integrates into harsh ambient factory floors, high-temperature manufacturing bays, and sub-zero outdoor perimeter paging zones.

Installation and Integration Guide for Ahuja AU-50XT PA Driver Unit

Mechanical Horn Coupling and Mounting Procedure

The Ahuja AU-50XT driver unit is engineered for rigid mechanical integration with industrial Public Address (PA) reflex horns and acoustic trumpets. It utilizes an industry-standard 1-3/8” - 18TPI (Throat Couple No. 1) threaded coupling. The acoustic head flange is manufactured from die-cast aluminium, providing mechanical stability and structural integrity during high-torque thread engagement.

Before threading the driver unit onto the reflex horn, ensure that the male threads of the driver flange and female throat threads of the horn are clean and free of debris. Carefully align the driver unit perpendicular to the horn throat and rotate clockwise until seated firmly. When properly mounted on an appropriate reflex horn assembly, the driver achieves an IP66 ingress protection rating in accordance with standard EN 60529, protecting the internal assembly against particulate dust and high-pressure water jets.

Dimensions and Structural Load Considerations

Site engineers and system integrators must account for the mechanical load when designing bracketry, poles, or wall mounts. The AU-50XT features an outer diameter of 150 mm, an overall height of 143 mm (ø150 x H143 mm), and a net unit weight of 2.47 kg. Mounting brackets and hardware must be rated to support the combined static and dynamic wind load of both the 2.47 kg driver unit and the attached horn flare in outdoor installations.

100V Line Power Tap Selection and Wiring

The AU-50XT includes a built-in 100V line matching transformer designed for distributed high-impedance Public Address sound systems. Power tap adjustment is executed directly via a rotary switch positioned at the rear housing of the unit, eliminating the need for internal transformer rewiring or soldering during field setup.

Switch Setting (Power Tap)	Input Impedance (100V Line)	Continuous Power (RMS)	Max Power Handling
50W	200 Ω	50W RMS	70W Max
40W	250 Ω	40W RMS	70W Max
20W	500 Ω	20W RMS	70W Max
10W	1000 Ω (1 kΩ)	10W RMS	70W Max
5W	2000 Ω (2 kΩ)	5W RMS	70W Max

When deploying multiple driver units across a constant-voltage 100V speaker distribution line, total system load is calculated by summing the wattages selected via the rear rotary switch across all parallel-connected units. The aggregate power draw must not exceed the continuous RMS output rating of the upstream 100V PA booster or mixer amplifier.

Thermal and Environmental Installation Requirements

The voice coil in the AU-50XT is precision-wound on an aluminium bobbin designed for efficient thermal dissipation during continuous high-power acoustic projection. The driver supports an operating temperature range of -30°C to +70°C, making it suitable for unconditioned industrial plants, perimeter fencing, and outdoor structural mountings. Ensure that continuous signal driving remains within the 50W RMS rating (70W maximum) within the operational frequency band of 160 Hz to 7,000 Hz to prevent mechanical or thermal voice coil over-excursion.

Industrial and Commercial Application Scenarios for Ahuja AU-50XT

The Ahuja AU-50XT Public Address driver unit is engineered for demanding commercial, institutional, and industrial acoustic deployments requiring clear vocal projection, high sound pressure levels, and long-line transmission capabilities. Featuring a built-in 100V line matching transformer with rotary-switch power taps (5W, 10W, 20W, 40W, and 50W) and an IP66 ingress protection rating when coupled with a reflex horn, this driver unit adapts to diverse high-ambient-noise and outdoor environments.

Distributed Industrial Paging and Mass Notification

In large manufacturing plants, distribution centers, and fabrication yards, audio signals must travel across extensive distances without signal degradation. The integrated 100V line matching transformer allows multi-speaker deployment along high-impedance speaker lines driven by constant-voltage amplifiers. Plant engineers and system integrators can adjust individual speaker output at each location using the rear rotary switch:

High-Noise Fabrication Areas: Set to the 50W tap (200Ω) or 40W tap (250Ω) to achieve sound pressure levels reaching up to 130 dB (at 50W/1m) to overcome background machinery noise.
Assembly Lines and Storage Aisles: Set to intermediate taps such as 20W (500Ω) or 10W (1kΩ) for balanced coverage without acoustic distortion.
Corridors and Low-Noise Support Zones: Set to the 5W tap (2kΩ) to maintain speech intelligibility while optimizing total amplifier load across the distributed network.

Perimeter Security and Outdoor Voice Projection

Perimeter monitoring stations, gatehouses, open parking facilities, and security access points require robust public address projection capable of operating under harsh weather conditions. Meeting EN 60529 standards with an IP66 rating when mounted to compatible reflex horns, the unit protects critical internal elements against heavy dust ingress and strong water jets. Its broad operational temperature range of -30°C to +70°C ensures continuous outdoor reliability in both extreme cold and high ambient heat.

Multi-Zone Campus and Transportation Hub Public Address

Large infrastructure facilities—including railway yards, bus terminals, multi-facility logistics parks, and educational campuses—benefit from the AU-50XT's vocal band frequency response of 160 Hz to 7,000 Hz. This frequency curve prioritizes speech clarity for routine announcements, schedule notifications, and emergency broadcast instructions. The precision-wound voice coil on an aluminium bobbin ensures heat dissipation during continuous, duty-intensive voice communications.

Reflex Horn Integration for Targeted Acoustic Coverage

Equipped with industry-standard 1-3/8” - 18TPI threading (Throat Couple No. 1) and a die-cast aluminium acoustic head (flange), the AU-50XT mounts directly to matching reflex horns and trumpets. This enables project planners to direct acoustic energy precisely toward long walkways, perimeter fencing, loading docks, and remote access lanes.

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