Product Information

Attribute

Value

Battery

Rechargeable

Media Playback Features

Microphone Only

Amplifier Class

Class-D Digital

Audible-Range

Upto 400 Meter

Watt

Upto 20 Watt

Voltage

12 V

Ahuja AM 22HSD portable PA megaphone with shoulder strap and handheld microphone

Megaphone AM 22HSD Ahuja

KTI14004005AM22

Product Description

The Ahuja AM-22HSD is a high-efficiency portable public address megaphone engineered for long-range voice projection, crowd control, and emergency signalling.

Make / Brand: Ahuja
Model: AM-22HSD
Power Output: 16 W Rated / 20 W Max
Voice Range: Approximately 400 m (up to 500 m for built-in siren)
Amplifier Type: High-efficiency Class-D digital amplifier
Power Source: 12 V DC via 10 × UM-3 (AA) dry cells or external 12 V car battery
Microphone: Unidirectional dynamic microphone (600 Ω) with volume control and Press-to-Talk (PTT) switch
Operation Modes: Voice amplification and built-in emergency siren
Dual Switch Control: Additional microphone switch integrated into the hand grip
Body Construction: Rugged, impact-resistant ABS plastic body
Dimensions: Horn Ø 220 mm, Length 370 mm
Net Weight: 1.85 kg (excluding battery cells)

KTI14004005AM22

4.7

20 ratings

Price

₹ 4,335.65 excl. GST

+ 18.00% Tax + Freight Charge

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Product Details
Available Brands	Ahuja
Unit	Numbers
HSN Code	85181000
Weight	2.5 kg
Dimension	L 37 x W 22 x H 22 cm cm ft in m
Warranty	12 Months No-Onsite Warranty
Resources	Download Datasheet
Tags/categories	Automation PA Solutions Wireless Megaphones

Usually dispatched within 4 days

About this product .

The Ahuja AM-22HSD is an industrial-grade portable PA megaphone engineered to deliver clean, intelligible voice reproduction and powerful acoustic signalling across open outdoor environments. Equipped with an acoustic horn flared to 220 mm in diameter, the unit achieves an effective speech projection range of up to 400 metres and an audible siren radius of up to 500 metres under clear operational conditions.
At the core of the AM-22HSD is an advanced Class-D digital amplifier module that maximises acoustic conversion efficiency while minimising parasitic power drain. This energy-efficient architecture allows continuous multi-hour field duty on standard 10 × AA (UM-3) dry cells, with extended operation enabled through external 12 V DC car battery connectivity via dedicated power input terminals.
Built for flexible field deployment, the megaphone features a versatile configuration that supports both shoulder-sling suspension and direct hand-grip operation. An ergonomic unidirectional 600-ohm dynamic microphone is tethered via a durable coiled cord, preventing acoustic feedback while allowing precise control via an integrated rotary volume dial and momentary Press-to-Talk (PTT) thumb switch.
To support swift emergency escalation and crowd management, the megaphone incorporates an internal multi-tone siren circuit that can be triggered instantly through a dedicated grip switch. The dual-trigger setup on both the handset and main body ensures instant readiness whether worn over the operator's shoulder or mounted statically on an elevated vantage point.
The entire enclosure is precision-moulded from high-grade ABS thermoplastic, providing superior structural rigidity, drop protection, and chemical resilience in harsh industrial or outdoor environments without adding excessive weight. Weighing only 1.85 kg without cells, it minimizes operator fatigue during extended patrols, evacuation drills, or shift communications.
The AM-22HSD is widely specified across commercial manufacturing plants, security perimeters, educational institutions, construction sites, municipal disaster management teams, and sports facilities requiring robust, cord-free voice amplification.
Routine maintenance involves inspecting dry cell compartments for terminal corrosion, replacing depleted batteries promptly, and wiping down the external ABS horn assembly with a dry or lightly damp lint-free cloth to maintain acoustic clarity and hygiene.

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Product Information .

Worship Places Industries, Factories Bungalow, Farm Houses Shopping Malls, Showrooms Party Plots, Gardens Restaurants Event Management Emergency Services

Power Source, Audio Input, and Operational Compatibility

The Ahuja AM-22HSD portable PA megaphone is engineered with versatile power and audio interface configurations, enabling rapid integration into industrial safety protocols, plant security operations, emergency response fleets, and municipal crowd control setups. Designed around high-efficiency Class-D amplification and standardized direct-current (DC) power inputs, the unit functions seamlessly across portable battery-operated and stationary vehicle-powered applications.

Electrical & Power Supply Interfacing

The AM-22HSD utilizes a nominal 12V DC power architecture that supports dual operating configurations depending on deployment mobility and field duty cycles:

Internal Dry Cell Configuration: Houses 10 × AA (UM-3) 1.5V pencil cells inside the internal battery compartment, delivering 12V to 15V nominal DC to power the internal Class-D amplifier for approximately 8 to 15 hours of operation, depending on duty cycle and battery chemistry (standard alkaline or heavy-duty cells).
External DC Vehicle & Auxiliary Power: Equipped with an external 12V DC input jack compatible with standard 12V to 14V DC vehicle car batteries and external 11.1V lithium-ion battery packs. This allows continuous stationary or vehicle-mounted operation without draining internal AA cells.

Power Source Option	Input Voltage Specification	Interfacing Mechanism	Deployment Profile
Internal AA (UM-3) Dry Cells	12V–15V DC (10 × 1.5V Cells)	Internal polarity-coded battery tray	Field patrol, portable mobile evacuation drills
External Vehicle Battery	12V–14V DC Lead-Acid / Auto	External DC input power jack	Vehicle checkpoints, stationary traffic control
External Lithium-Ion Pack	11.1V–12.6V DC Li-ion	External DC connection lead	Extended standalone security operations

Acoustic Transducer & Microphone Compatibility

The unit features a dedicated audio path matched specifically to an included 600-ohm unidirectional dynamic microphone. This dedicated impedance matching prevents signal distortion and maintains optimal voice clarity across the rated 16W to 20W power envelope (reaching peak outputs up to 22W rated / 28W max). The audio interface system features:

Detachable Microphone Assembly: Incorporates a Press-to-Talk (PTT) switch and rotary volume control potentiometer for precise output level calibration.
Hand Grip Dual-Switching Circuitry: Allows the operator to mount the microphone into the rear docking slot of the Ø220 mm flare horn and trigger acoustic broadcast directly via the secondary trigger switch integrated into the ergonomic hand grip.
Emergency Siren Tone Generator: Built-in acoustic siren circuit compatible with emergency alarm protocols, projecting up to 500 m (and up to 1 km in low-noise environments) for industrial disaster alerts.

Physical Deployment & Transport Compatibility

Constructed with an impact-resistant ABS resin body, the AM-22HSD integrates mechanical mounting and carrying provisions to suit diverse occupational tasks. Heavy-duty eyelet brackets support the included shoulder sling strap for prolonged mobile carrying, while the rear housing includes a secure docking bracket to retain the coiled-cord microphone during single-handed transit or storage.

Ahuja AM-22HSD Setup, Power Configuration, and Deployment Guidelines

Battery Chamber Configuration (Internal 12V DC Power)

The Ahuja AM-22HSD operates portably via an internal battery compartment configured for 10 × AA (UM-3) dry cells. To install internal batteries, release the rear compartment latch on the all-ABS resin body to access the multi-cell battery holder. Insert 10 standard 1.5V AA (UM-3) alkaline or heavy-duty cells into the sled, verifying that the positive (+) and negative (-) terminals strictly align with the internal polarity markings.

Improper cell orientation will prevent power delivery to the internal Class-D amplifier module. Once all 10 cells are properly seated against the spring contacts, insert the loaded holder back into the megaphone housing and firmly latch the access cover to maintain a secure electrical connection during transport and field operation.

External 12V DC Power Interface

For stationary announcements, long-duration operational shifts, or vehicle-mounted emergency deployment, the AM-22HSD can be powered continuously from an external DC source rather than internal dry cells. Compatible external sources include standard 12V vehicle electrical systems, 12V–14V car batteries, or auxiliary 11.1V lithium-ion battery packs.

Locate the dedicated DC input jack positioned on the megaphone body.
Connect the external 12V DC power lead to the power socket, ensuring positive/negative polarity matching to prevent input faults.
When running on an external 12V car battery lead, internal AA cells do not need to be loaded, reducing the active carrying weight of the 1.85 kg unit.
Ensure the DC power plug is firmly seated in the socket to avoid intermittent power interruptions in high-vibration vehicle or industrial environments.

Shoulder Sling and Hand Grip Mounting

The megaphone supports two primary physical deployment configurations: direct handheld operation via the integrated ergonomic hand grip, or mobile shoulder-slung operation for extended crowd control and public address tasks.

Shoulder Sling Assembly: Secure the heavy-duty shoulder sling strap directly to the integrated metal eyelet brackets located on the top chassis of the ABS housing. Adjust the strap length to suspend the unit comfortably at waist or hip level.
Handheld Deployment: For single-handed point-and-talk operation, dock the detachable unidirectional microphone securely into the dedicated rear bracket of the housing. This aligns the controls so the operator can activate voice transmission via the secondary switch integrated directly into the hand grip.
Detached Handheld Microphone Mode: When carrying the megaphone via the shoulder sling, detach the 600-ohm unidirectional microphone from the rear docking bracket to operate the primary Press-to-Talk (PTT) switch and rotary volume control freely in hand.

System Commissioning, Acoustic Alignment, and Siren Operation

Prior to deploying the AM-22HSD across industrial sites, fire safety evacuation drills, or traffic management zones, perform a basic acoustic check. Position the rotary volume dial on the microphone body at a low setting before depressing the PTT switch. Gradually advance the volume control to the required level to achieve clear projection across the target voice range (approx. 400 m).

To prevent acoustic feedback squeal or howling during speech transmission, always ensure the unidirectional microphone head is positioned behind the plane of the Ø220 mm horn flare and pointed away from the acoustic opening. To activate the built-in emergency siren (500 m range rating), engage the dedicated siren switch on the unit to immediately generate the high-intensity acoustic warning signal.

Ahuja AM-22HSD PA Megaphone: Industrial Diagnostic & Troubleshooting Guide

Diagnostic Guide for Power and Operational Failures

When deploying the Ahuja AM-22HSD portable megaphone during facility drills, plant evacuations, or crowd control operations, unexpected power failure is typically linked to the DC power supply circuit. If the megaphone fails to power on via internal dry cells, inspect the battery compartment configuration. The unit requires 10 × AA (UM-3) 1.5V pencil cells configured to deliver a combined 12V DC operating voltage. Verify that every cell matches the correct polarity orientation indicated inside the internal battery holder. A single reversed AA cell breaks the circuit loop and prevents the Class-D amplifier from powering up.

When running the megaphone from an external 12V car battery or auxiliary 12V–14V DC supply, confirm that the DC power plug is firmly seated in the dedicated 12V input jack. Check the external power cable for continuous continuity and verify that the external DC source maintains sufficient operational voltage under load.

Resolving Acoustic Feedback, Howling, and Audio Distortion

High-pitched squealing or acoustic howling occurs when amplified sound from the Ø220 mm flare horn re-enters the unidirectional 600-ohm dynamic microphone. To immediately eliminate feedback during mobile public address operations, ensure the detachable microphone is held behind the horn acoustic flare rather than directly in front of or adjacent to the horn mouth. If the microphone is docked in the rear bracket while utilizing the integrated hand grip switch, adjust the rotary volume control slider on the microphone body to an optimal level that balances speech projection against ambient acoustic reflection.

Audio distortion, clipping, or a noticeably reduced voice projection range (falling well below the rated 400 m voice or 500 m siren thresholds) indicates depleted battery voltage. The high-efficiency Class-D amplifier circuit requires stable 12V DC power to maintain clean 16W rated / 20W maximum acoustic output. Replace all 10 AA pencil cells simultaneously with fresh cells or switch to an external 12V battery source.

Troubleshooting Matrix: Common Faults and Corrective Actions

Symptom / Fault	Probable Cause	Recommended Corrective Action
No power output / Unit completely silent	Inverted AA cell polarity, depleted battery pack, or unseated external 12V DC power jack.	Inspect all 10 × AA pencil cells for correct orientation. Replace depleted cells or verify external 12V DC power connection.
Intermittent transmission during speech	Loose Press-to-Talk (PTT) switch engagement or oxidized battery spring contacts.	Check engagement on both the microphone PTT switch and hand grip switch. Clean terminal contact springs with a dry, lint-free cloth.
High-pitched feedback or howling	Microphone cartridge oriented toward the Ø220 mm flare horn or volume level set excessively high.	Re-position the unidirectional microphone behind the megaphone horn flare and lower the integrated volume slider.
Distorted audio or weak siren output	Low battery voltage dropping below operational threshold under dynamic amplifier load.	Replace internal AA batteries or connect to an external 12V vehicle battery.

Preventive Terminal Maintenance and Storage Procedures

To ensure ready deployment in safety drills and emergency response operations, keep the battery compartment terminals and external DC input socket free from dust, debris, and oxidation. When the megaphone is scheduled for extended storage or non-operational intervals, remove all 10 × AA pencil cells from the ABS resin housing to prevent corrosive chemical leakage from damaging internal amplifier circuitry and contact springs.

Industrial, Safety, and Field Deployment Use Cases

The Ahuja AM-22HSD Portable PA Megaphone is engineered for high-clarity voice projection and rapid acoustic alerting across diverse commercial, municipal, and industrial environments. Powered by a high-efficiency Class-D amplifier delivering 16W rated and up to 20W maximum output, this unit enables safety personnel, facility managers, and security teams to broadcast intelligible verbal directives up to 400 meters and emergency siren tones across 500 meters (reaching up to 1 km in quiet conditions).

Industrial Emergency Evacuation and Fire Safety Drills

During plant emergencies, chemical hazard alerts, or routine fire evacuation drills, fixed public address systems may be offline or compromised. Safety officers use the AM-22HSD to establish immediate, high-decibel communication across assembly points, processing yards, and warehousing bays. The integrated acoustic siren tone instantly cuts through ambient plant noise to signal danger, while the unidirectional 600-ohm microphone with volume control ensures clear evacuation instructions without acoustic feedback.

Construction Site and Heavy Infrastructure Management

On active construction yards, fabrication facilities, and mining surfaces, personnel are dispersed across wide, noisy perimeters. Supervisors utilize the megaphone to broadcast shift instructions, alert crane operators, coordinate material loading, and enforce safety perimeter boundaries. Constructed from impact-resistant all-ABS resin with an acoustic horn flare diameter of Ø220 mm and total length of 370 mm, the megaphone withstands the physical demands of harsh outdoor job sites.

Disaster Response, Municipal Monitoring, and Traffic Coordination

Disaster response teams, municipal wardens, and traffic regulatory authorities deploy the AM-22HSD during flood management, roadblock setup, civic advisories, and transit diversions. The dual-power architecture accommodates 10 × AA (UM-3) pencil cells for 8 to 15 hours of standalone operation, or connects directly to a vehicle's 12V DC car battery via the dedicated DC input jack, allowing continuous mobile broadcasting from emergency patrol vehicles without depleting internal dry cells.

Crowd Control, Public Order, and Campus Operations

Law enforcement units, event security teams, and institutional campus security personnel rely on the AM-22HSD for managing mass gatherings, public rallies, and open-ground sports venues. Operational flexibility is enhanced by dual switching options: operators can speak using the Press-to-Talk (PTT) switch located directly on the detachable microphone body or use the secondary switch integrated into the ergonomic hand grip while securing the unit with the shoulder sling strap.

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Battery	Rechargeable	Rechargeable	—	—
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Voltage	12 V	12 V	—	—
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