Ahuja SUH 25MT weatherproof rectangular 25W PA horn speaker with mounting bracket

PA Speaker Ahuja SUH 25MT 25W

KTI14004007HSXT

Product Description

The Ahuja SUH 25MT is a heavy-duty, weatherproof rectangular public address horn speaker engineered for clear speech reproduction and high-output acoustic coverage across industrial facilities and commercial perimeters.

Make / Brand: Ahuja
Model: SUH-25MT
Input Power: 25 W RMS / 38 W Maximum
Transformer Power Taps (100V): 25 W (400 Ω), 20 W (500 Ω), 15 W (670 Ω), 10 W (1 kΩ), 5 W (2 kΩ)
Frequency Response: 250 Hz – 10,000 Hz
Sound Pressure Level (SPL): 108 dB (1W/1m), 122 dB at rated 25 W/1m
Housing Material: UV-protected ABS plastic horn flare and rear casing
Mounting & Hardware: Integrated bracket with stainless steel fasteners
Cable & Ingress: 0.6 m 2-core sheathed cable with sealed watertight gland, IP66 rated
Standards Compliance: EN 60065 Low Voltage Directive compliant

KTI14004007HSXT

Price

₹ 2,543.20 excl. GST

+ 18.00% Tax + Freight Charge

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Product Details
Available Brands	Ahuja
Unit	Numbers
HSN Code	85319000
Weight	1.9 kg
Dimension	L 29 x W 31.5 x H 16.5 cm cm ft in m
Warranty	12 Months No-Onsite Warranty
Resources	Download Specification
Tags/categories	Automation PA Solutions Speakers, Horn Speakers
Standards	IS/IEC 60529

Usually dispatched within 4 days

About this product .

The Ahuja SUH 25MT PA horn speaker is designed for demanding outdoor and industrial acoustic environments. Built with a rugged UV-stabilised ABS plastic flare and back cover, the enclosure resists degradation from continuous sunlight exposure, chemical atmospheres, and extreme weather conditions.
Equipped with an internal 100V line matching transformer, the unit enables long-distance audio distribution without significant line transmission loss. A rear-mounted rotary switch allows field technicians to select power taps between 5W, 10W, 15W, 20W, and 25W to match zone sound pressure requirements.
The acoustic driver features a precision-wound voice coil on an aluminium bobbin incorporating heat dissipation fins. This thermal management ensures reliable operation during sustained emergency announcements or continuous industrial paging cycles without coil burnout.
Featuring an IP66 ingress protection rating and compliant with EN 60065 standards, the speaker is safeguarded against fine dust ingress and high-pressure water jets. Stainless steel mounting bolts and a watertight cable gland prevent rust and moisture penetration at installation points.
The rectangular horn profile delivers directed dispersion characteristics, making it particularly effective for factory yards, warehouse aisles, railway platforms, perimeter fencing lines, and mobile vehicle installations where sound focus is critical.
Routine maintenance involves visual checks of mounting hardware tightness and verifying that the rear rotary selector cap and cable gland seal remain clean and unobstructed.

Product Information .

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

System Compatibility and Electrical Integration for Ahuja SUH-25MT

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.

Ahuja SUH-25MT 100V PA Horn Speaker Installation and Wiring Guide

The Ahuja SUH-25MT is an industrial 100V distributed-line public address horn speaker designed for high-intelligibility paging, alarm signaling, and voice distribution across industrial facilities, perimeter security corridors, and outdoor plants. Engineered with a UV-protected ABS plastic enclosure and rated for IP66 ingress protection, proper mechanical installation and electrical line matching are essential to ensure acoustic coverage and long-term operating reliability under severe environmental conditions.

Mechanical Mounting and Directional Alignment

The SUH-25MT features a compact rectangular profile measuring 315 mm (W) x 165 mm (H) with a horn depth of 290 mm and a net unit weight of 1.90 kg. The rectangular horn geometry is engineered to deliver controlled directional acoustic dispersion, making it particularly effective for long-throw perimeters, factory walkways, loading docks, and vehicle mounting.

Support Structure: Secure the heavy-duty mounting bracket directly to flat walls, steel stanchions, unistrut channels, or pole clamps using the corrosion-resistant stainless steel mounting bolts provided. Ensure the mounting substrate can continuously bear the 1.90 kg static weight plus dynamic outdoor wind loads.
Angle Adjustment: Tilt the horn slightly downward below horizontal to optimize sound projection toward target listening zones and facilitate natural drainage of condensation or moisture away from the flare assembly.
Torque & Hardware: Tighten all external stainless steel hardware securely to lock the tilt and swivel alignment in place, preventing drift caused by industrial machinery vibrations.

100V Constant-Voltage Wiring Connections

The SUH-25MT incorporates an internal line matching transformer designed for 100V distributed constant-voltage commercial and industrial amplifier lines. This architecture minimizes signal transmission losses across extended cable runs common in large-scale manufacturing yards and perimeter systems.

Input Cable: The unit comes equipped with an integrated 0.6 m (2 ft) 2-core sheathed speaker cable exiting the rear enclosure through a factory-sealed, water-tight, tug-proof cable gland.
Junction Termination: Connect the 2-core cable to the incoming 100V speaker line inside a weatherproof, IP66-rated external junction box using screw terminals or moisture-resistant crimp connectors. Maintain correct audio polarity across all speakers on the line to preserve phase alignment.
Amplifier Compatibility: Connect exclusively to standard 100V constant-voltage outputs on public address booster amplifiers or mixer-amplifiers complying with EN 60065 safety standards. Do not connect directly to low-impedance (4Ω/8Ω) amplifier outputs while the transformer is in circuit.

Rotary Power Tap and Impedance Selection

The speaker is equipped with an external rotary selector switch located at the rear of the hermetically sealed assembly. This allows commissioning technicians to adjust power taps without opening the IP66 housing.

Power Tap (100V Line)	Nominal Load Impedance	Acoustic Output Level (SPL @ 1m)	Recommended Zone Deployment
25W (RMS)	400 Ω	122 dB	High-noise industrial plants, outdoor perimeters, yard paging
20W	500 Ω	~121 dB	Loading bays, high-ceiling fabrication shops
15W	670 Ω	~120 dB	Warehouse aisles, outdoor circulation routes
10W	1 kΩ	~118 dB	Covered walkways, medium-noise storage areas
5W	2 kΩ	~115 dB	Low-noise corridors, peripheral dispatch areas

Set the rotary tap based on the required local Sound Pressure Level (rated at 108 dB/1W/1m across a 250 Hz to 10,000 Hz operating frequency response) and ensure that the cumulative wattage of all connected speakers on the audio run does not exceed the continuous power rating of the driving 100V amplifier.

Ahuja SUH-25MT PA Horn Speaker Troubleshooting & Diagnostic Guide

Industrial public address networks require reliable signal delivery across long cable runs. When experiencing audio anomalies, low volume, or complete signal dropouts on the Ahuja SUH-25MT 100V line horn speaker, field technicians can isolate and resolve faults using the structured diagnostics below.

1. Total Loss of Audio Output (No Sound)

If the horn speaker fails to produce sound, check the audio distribution chain systematically:

Line Continuity and Connections: Inspect the factory-fitted 0.6 m (2 ft) 2-core sheathed speaker cable. Verify that the conductors are securely terminated into the distribution junction box without opens, shorts, or core shearing at the water-tight, tug-proof cable gland.
Rotary Tap Selector Position: Confirm the rotary switch located at the rear of the sealed ABS housing is set firmly into one of the designated detents (5W, 10W, 15W, 20W, or 25W) and has not settled between positions, which can cause an open circuit.
100V Line Signal Verification: Measure the AC audio signal across the 100V line using a true-RMS multimeter while an announcement or test tone is active. If no AC voltage is present, verify the zone output on the mixer-amplifier or booster amplifier.
Voice Coil Continuity: If the 100V line is active but the unit remains silent, isolate the speaker and measure continuity. If the internal driver coil has failed from extreme thermal or electrical stress, service the unit using an official Ahuja SUH-25M / SUH-25MT replacement diaphragm assembly.

2. Low Sound Pressure Level or Volume Attenuation

When output does not meet the expected 108 dB/1W/1m (up to 122 dB at 25W/1m rated SPL):

Power Tap Configuration: Check the rotary wattage tap setting at the rear. If the selector is set to a higher impedance / lower wattage tap (e.g., 2kΩ for 5W or 1kΩ for 10W), output volume will be significantly lower than when tapped at 400Ω (25W) or 500Ω (20W).
Line Voltage Drop: While 100V distributed systems minimize cable losses over long distances, excessively long runs with undersized cable gauges can reduce line voltage under heavy multi-speaker loads.
Amplifier Overhead: Ensure the total combined wattage tap value of all connected 100V speakers on the line does not exceed the amplifier's rated RMS capacity.

3. Audio Distortion, Buzzing, or Rattling

Distortion indicates incorrect line matching, signal clipping, or mechanical interference:

Frequency Range and DSP Filtering: The Ahuja SUH-25MT operates across a 250 Hz to 10,000 Hz frequency response. Driving heavy low-frequency bass content below 250 Hz can cause acoustic distortion and mechanical bottoming. Apply a high-pass filter (HPF) on the amplifier input at or above 200–250 Hz for clean speech reproduction.
Line Mismatching: Ensure the 100V line transformer input is never connected directly to a 4Ω or 8Ω low-impedance amplifier output, and ensure the amplifier output line is set strictly to 100V constant-voltage mode.
Mechanical Obstruction: Inspect the 315 mm x 165 mm rectangular bell flare and internal acoustic reflector for accumulated debris, nesting insects, or foreign objects.

4. Fault Isolation Reference Table

Symptom	Probable Root Cause	Corrective Action
No Audio Output	Disconnected 2-core cable, open amplifier zone, or damaged driver coil	Verify wiring continuity, check 100V amplifier feed, or replace driver diaphragm.
Weak / Low Volume	Low wattage tap selected (e.g., 5W/2kΩ) or amplifier zone overloaded	Adjust rear rotary switch to higher wattage tap (up to 25W/400Ω); balance total zone load.
Harsh Distortion / Clipping	Amplifier overdriven or frequencies below 250 Hz being amplified	Reduce amplifier master gain; engage high-pass filter (>250 Hz) on the source audio.
Intermittent Sound	Loose junction connection or switch set between tap positions	Firmly click rotary switch into detent; tighten external terminal block connections.

5. Mechanical and Environmental Inspection

Ensure the IP66 dust-tight and water-jet-resistant integrity remains intact. Inspect the UV-protected ABS housing for impact damage, verify that the rear sealed cable gland is tight, and check that the stainless steel mounting bracket bolts are properly torqued to prevent movement in high-vibration or mobile vehicle installations.

Industrial Applications & Deployment Scenarios for Ahuja SUH-25MT

The Ahuja SUH-25MT is an industrial-grade, rectangular 100V public address horn speaker engineered for clear speech transmission, emergency paging, and voice alerting across harsh or sprawling operational environments. Combining an IP66 ingress protection rating, UV-protected ABS construction, and an integrated multi-tap 100V line matching transformer, it provides reliable acoustic output across diverse commercial and industrial system architectures.

Industrial Manufacturing Plants and Heavy Work Yards

In high-ambient-noise manufacturing bays, processing plants, and fabrication yards, audio clarity within the human vocal range is essential for operational and safety paging. The Ahuja SUH-25MT delivers a rated Sound Pressure Level (SPL) of 108 dB/1W/1m (up to 122 dB at its full 25W RMS rating) across a targeted frequency response band of 250 Hz to 10,000 Hz. The precision-wound voice coil on an aluminium bobbin incorporates dedicated heat dissipation fins, ensuring sustained thermal endurance during extended voice announcements or continuous alert cycles. Its robust IP66-sealed housing resists airborne dust, metal particulate, and direct water jets commonly encountered during facility washdowns.

Large-Scale Warehousing and 100V Distributed Lines

Sprawling logistics terminals, inventory warehouses, and distribution centers require long cable runs connecting multiple speakers to central amplifiers. The SUH-25MT features an integrated 100V line matching transformer designed specifically to mitigate line loss and voltage drops across extensive cable lengths. System integrators can balance sound coverage across high-ceiling aisles, loading bays, and dispatch offices using the rear-mounted rotary tap switch without dismantling the enclosure.

25W (400Ω) / 20W (500Ω): Ideal for noisy loading docks, container staging zones, and active forklift routes requiring maximum acoustic penetration.
15W (670Ω) / 10W (1kΩ): Balanced coverage for intermediate storage bays and wide logistics corridors.
5W (2kΩ): Optimized tap setting for lower-ceiling buffer zones and covered walkways to prevent acoustic over-saturation.

Outdoor Perimeter Security and Boundary Intercom

Rectangular horn geometry (315 mm x 165 mm with a 290 mm depth) provides directional sound dispersion, directing acoustic energy along security fences, gates, entry barriers, and facility perimeters rather than dispersing power inefficiently. The UV-stabilised ABS flare and back cover prevent structural degradation under intense sunlight, while external stainless steel stand mounting bolts resist corrosion from rain and humidity. Pre-fitted with a 0.6 m 2-core sheathed speaker cable exiting through a watertight, tug-proof cable gland, the unit integrates smoothly with outdoor junction boxes.

Mobile Public Safety and Utility Fleet Vehicles

Weighing 1.90 kg (2.1 kg gross packed weight), the SUH-25MT is suitable for roof-rack or bumper mounting on emergency response vehicles, municipal inspection fleets, and industrial patrol utility trucks. Its compliance with European Union standard EN 60065 verifies rigorous electrical safety, and the rugged ABS horn flare withstands road vibration and weather exposure during mobile public address operations.

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