Product Information

Attribute

Value

Audible-Range

Upto 400 Meter

Watt

Upto 20 Watt

Voltage

6 V

Battery

Non-Rechargeable

Media Playback Features

Microphone Only

Amplifier Class

Standard Analog PA

Hitune PM 90S PA Megaphone

KTI14004007P90S

Product Description

The Hitune PM 90S is an industrial-grade 20W shoulder sling public address megaphone engineered for high-clarity voice projection and emergency acoustic alerting across large facilities.

Make/Brand: Hitune
Model: PM-90S
Power Output: 16 W rated, 20 W maximum
Acoustic Voice Range: 0.4 km under standard conditions, up to 1.0 km in quiet environments
Microphone Type: Unidirectional dynamic microphone
Signaling Functions: Voice amplification and integrated warning siren
Body Material: Heavy-duty ABS polymer construction
Carrying Format: Shoulder sling configuration with detached handset microphone
Power Supply: 6V DC via 4 x UM-1 dry cells or external 6V vehicle/motorbike battery connection
Dimensions & Weight: Horn diameter 250 mm, length 370 mm; 2.2 kg net weight

KTI14004007P90S

4.8

11 ratings

Price

₹ 2,782.00 excl. GST

+ 18.00% GST. Freight after pincode at cart.

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Product Details
Available Brands	Hitune
Unit	Numbers
HSN Code	85181000
Weight	2.2 kg
Dimension	L 37 x W 25 x H 25 cm cm ft in m
Warranty	Not Applicable
Resources	Download Datasheet Download Datasheet 2
Tags/categories	Automation PA Solutions Wireless Megaphones

Usually dispatched within 5 days

About this product .

The Hitune PM 90S is engineered for robust industrial sound reinforcement, utilizing an all-ABS polymer body that provides high structural rigidity and impact resistance during demanding field deployment. Its shoulder sling format separates the primary acoustic horn from the handheld microphone, substantially reducing operator arm fatigue during continuous communication.
Acoustically driven by an efficient horn flare design, the megaphone delivers a rated audio output of 16 watts and a peak output of 20 watts. This output enables an effective vocal transmission range of 0.4 kilometers in standard industrial ambient noise environments, extending up to 1.0 kilometer across unobstructed, quiet zones.
The system is fitted with a unidirectional dynamic microphone that concentrates acoustic pickup on the operator's voice while attenuating off-axis background machinery noise. Operators can switch instantaneously between live voice projection and an integrated alerting siren, with easily accessible controls for immediate volume adjustment.
For versatile power delivery in the field, the unit operates on a 6V DC supply. It accommodates internal power from 4 x UM-1 dry cells or direct wired connection to an external 6V vehicle or motorbike battery for prolonged stationary operation.
Commonly deployed in plant safety operations, the PM 90S serves vital roles in emergency evacuation coordination, industrial marshaling, safety drills, and outdoor assembly point instructions. Its loud siren provides an unmistakable acoustic alarm for incident response and hazard evacuation.
To maintain peak performance, operators should position the microphone away from the direct line of the horn flare during high-volume operation to eliminate acoustic feedback. For long-term equipment storage, ensure that all 4 x UM-1 dry cells are removed from the internal battery chamber to avoid terminal oxidation.

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Product Information .

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

Hitune PM-90S Installation, Power Connection & Field Setup Guide

Physical Configuration and Shoulder Sling Setup

The Hitune PM-90S is engineered as a shoulder sling type public address megaphone, separating the primary 250 mm acoustic horn housing from the handheld unidirectional dynamic microphone. To deploy the unit for plant muster marshaling, outdoor industrial guidance, or emergency evacuation signaling, unpack the all-ABS polymer body and inspect the 370 mm chassis. Adjust the integrated shoulder strap so that the 2.2 kg megaphone rests securely against the operator's torso or flank, leaving both hands free to position the handheld microphone and manipulate operational switches.

Primary Power Setup: Internal Dry Cell Installation

Field deployment relies on a 6V DC internal operating circuit. Access the internal battery chamber located at the rear housing of the megaphone. Insert 4 x UM-1 cells (they are not included) according to the designated polarity markings molded into the chamber. Ensure firm terminal contact across all dry cells (they are not included) before fastening the compartment latch. For long-term facility storage or between scheduled safety drills, always remove the 4 x UM-1 cells (they are not included) to prevent electrolyte leakage and terminal contact oxidation.

External Power Setup: 6V DC Auxiliary Connection

Where extended high-output operation is required at static muster checkpoints or perimeter posts, the PM-90S supports an external power source. Connect an external 6V DC motor bike battery (they are not included) or compatible 6V car battery (they are not included) supply line to the auxiliary DC input terminals. Confirm that the external lead delivers a regulated 6V DC supply to prevent electrical stress on the internal 16W rated / 20W maximum power amplification circuitry.

Microphone Handling and Acoustic Feedback Prevention

The handheld microphone features an integrated unidirectional dynamic element designed to capture voice frequencies while attenuating ambient industrial background noise. Position the microphone 2 to 5 cm from the mouth when transmitting voice commands. To avoid acoustic feedback (howling), never direct the unidirectional dynamic microphone capsule toward the 250 mm horn flare while the volume control is adjusted to high output levels. Utilize the conveniently located volume control dial to modulate sound levels up to the maximum 20W peak, providing 0.4 km voice coverage under normal plant conditions and up to 1.0 km in quiet outdoor zones. Switch to the built-in siren mode for urgent evacuation alerting.

Field Commissioning Specifications

Parameter	Specification / Commissioning Requirement
Chassis Dimensions	Horn Flare Ø 250 mm, Length 370 mm
Product Net Weight	2.2 kg (Package gross weight: 2.62 kg)
Chassis Material	Impact-resistant all-ABS polymer
Internal Power Supply	6V DC via 4 x UM-1 cells (they are not included)
External DC Power Supply	6V DC motor bike battery or car battery (they are not included)
Rated / Max Power Output	16W rated / 20W maximum
Acoustic Voice Range	0.4 km (standard field conditions) / 1.0 km (quiet ambient conditions)
Signaling Functions	Amplified voice transmission & integrated siren alerting
Microphone Type	Handheld unidirectional dynamic microphone

Maintenance, Servicing, and Storage Procedures for Hitune PM-90S

Power Cell Management and Battery Compartment Care

The Hitune PM-90S operates on a 6V DC electrical circuit powered by 4 x UM-1 cells (they are not included) or an auxiliary external vehicle or motor bike battery (they are not included). For reliable field deployment in emergency marshaling and industrial public address environments, regular inspection of the internal battery compartment is essential. Check the spring contacts and terminal plates inside the casing for signs of oxidation, atmospheric tarnishing, or chemical residue.

Whenever the megaphone is scheduled for downtime, placed into emergency standby storage, or not in active rotation, operators must remove all 4 x UM-1 cells (they are not included). Extended storage with internal dry cells (they are not included) installed presents a severe risk of chemical electrolyte leakage, which can pit electrical terminals, degrade internal wiring, and cause premature component failure. If an external 6V DC vehicle battery (they are not included) is utilized via external supply wiring, inspect the cable insulation and push-on connectors regularly for fraying or loose connections.

ABS Housing and Acoustic Horn Maintenance

The PM-90S features an all-ABS polymer body with a 250 mm diameter horn flare and an overall body length of 370 mm. While ABS is selected for structural resilience against field impacts and rough handling, maintaining the physical integrity of the shell ensures long-term acoustic performance. Wipe down the external surfaces with a dry or lightly dampened non-abrasive industrial wipe to remove dust, soot, and airborne particulate accumulation. Never apply hydrocarbon solvents, chlorinated degreasers, or abrasive cleaning compounds to the ABS surface, as these agents can degrade or embrittle the polymer structure.

Regularly inspect the rim of the 250 mm horn flare and the body seams for mechanical stress or cracking resulting from transport shocks. Ensure that foreign matter, moisture, or particulate build-up does not obstruct the throat of the acoustic horn assembly, which could muffle the 16W rated and 20W maximum acoustic output.

Dynamic Microphone and Control Switch Care

Because the PM-90S utilizes a shoulder sling configuration, the unidirectional dynamic microphone is housed in a separate handheld wand connected via a flexible cable. Protect the dynamic microphone element by keeping the capsule grille clean and free from moisture droplets and industrial debris. When testing or operating the unit, always direct the unidirectional dynamic microphone capsule away from the 250 mm horn flare to prevent high-gain acoustic feedback and loud howling oscillations.

Exercise the volume control potentiometer and mechanical switches periodically to prevent contact fouling from dust ingress. Toggle the voice and built-in siren selectors through their full actuation ranges to ensure positive mechanical latching and smooth electrical engagement during urgent field alerts.

Preventive Maintenance and Inspection Schedule

Pre-Deployment Check: Confirm that 4 x UM-1 cells (they are not included) are inserted with correct polarity (+/-), verify that the volume control operates smoothly, test voice transmission across baseline distances, and briefly trigger the siren switch.
Post-Operation Cleaning: Wipe the ABS horn flare, body, and handheld microphone capsule; disconnect any external 6V vehicle battery leads (they are not included); inspect the shoulder sling harness and attachment clips for mechanical wear.
Storage Preparation: Completely extract all dry cells (they are not included) before shelving the 2.2 kg unit in a dry, temperature-regulated industrial storage locker free from direct environmental exposure.

Hitune PM-90S Industrial Troubleshooting and Fault Isolation Guide

Diagnostic Overview for Industrial Field Operations

The Hitune PM-90S shoulder sling public address megaphone is engineered for industrial plant marshaling, muster stations, and emergency alerting. When operational disruptions occur during safety procedures, rapid fault isolation is required to restore the 16W rated and 20W maximum acoustic transmission. Follow these technical procedures to diagnose power, audio capture, amplification, and signaling anomalies on the 2.2 kg all-ABS polymer assembly.

Acoustic Feedback and High-Gain Howling Remediation

A loud acoustic howling or continuous high-pitch screeching occurs when the amplified sound waves exiting the 250 mm diameter horn flare re-enter the unidirectional dynamic microphone capsule. Because the PM-90S utilizes a shoulder sling configuration separating the horn body from the handheld microphone, spatial positioning is critical during high-gain operation.

To remediate feedback, point the unidirectional dynamic microphone directly away from the 250 mm horn flare. Ensure that the microphone housing remains behind or perpendicular to the mouth of the 370 mm long megaphone body. If close-proximity reflection from indoor structures or plant equipment causes secondary acoustic loop feedback, incrementally attenuate the sound level using the integrated volume control until clear voice reproduction is achieved without sustained resonance.

Power Supply Failure and 6V DC Circuit Diagnosis

If the megaphone fails to power on or produces no acoustic output during push-to-talk activation, inspect the direct current supply chain. The PM-90S operates on a nominal 6V DC system powered either by 4 x UM-1 cells (they are not included) or an external motor bike / vehicle battery (they are not included).

When utilizing internal dry cells (they are not included), access the battery compartment and verify polarity alignment. Reversed polarity on any of the 4 x UM-1 cells (they are not included) breaks the 6V DC series circuit. Check the contact springs and terminal plates for electrolyte residue or surface oxidation. To prevent terminal corrosion and internal component degradation, inspect the chamber regularly and verify that dry cells (they are not included) are removed whenever the equipment is stored between plant drills. If operating from an external 6V DC car or motor bike battery (they are not included), test the DC feed line for loose terminations, broken leads, or reverse DC polarity.

Range Degradation, Weak Audio, and Distortion

The PM-90S is designed to project clear voice transmission across 0.4 km under standard operational conditions and up to 1.0 km in quiet acoustic areas. A significant drop in projection range or raspy, clipped voice audio typically indicates supply voltage depression. When the 4 x UM-1 cells (they are not included) discharge below operating thresholds, the amplifier cannot sustain the 16W rated output, resulting in harmonic distortion and muffled projection. Test terminal voltage across the cell set and replace all 4 x UM-1 cells (they are not included) simultaneously to avoid uneven voltage delivery.

Operational Mode Switching and Siren Verification

The PM-90S incorporates dual signaling functions comprising dynamic microphone speech amplification and an integrated alerting siren. If the built-in siren fails to sound or the voice channel stays silent, check the operation switch and volume potentiometer contacts. Debris accumulation on the control interfaces can disrupt signal routing between the unidirectional dynamic microphone and the siren tone generator. Cycle the operation switch firmly between operational modes and adjust the volume control across its full travel to clear minor contact resistance.

Field Fault Isolation Matrix

Operational Symptom	Potential Root Cause	Corrective Action
Complete absence of voice and siren output	Depleted or improperly oriented 4 x UM-1 cells (they are not included); disconnected 6V DC external battery line (they are not included)	Verify cell orientation; measure for 6V DC supply; clean terminal contacts; inspect external battery (they are not included) wiring leads.
Severe acoustic squeal / howling feedback	Unidirectional dynamic microphone capsule aimed into the 250 mm horn flare at elevated gain	Reposition the handheld microphone behind the horn flare; reduce gain via the volume control.
Distorted voice output; range below 0.4 km	Voltage drop below operating limits in internal dry cells (they are not included)	Replace the complete set of 4 x UM-1 cells (they are not included) or connect a verified 6V DC power source.
Siren functions but microphone fails to transmit	Microphone switch disengaged or signal interruption along the handheld microphone assembly	Engage the microphone switch; check cable relief at the 370 mm ABS housing junction.

Industrial Applications and Operational Scenarios for Hitune PM-90S

The Hitune PM-90S shoulder sling megaphone (KT ERP reference KTI14004007P90S) is engineered for clear public address and acoustic signaling across industrial plants, logistical yards, and safety-critical environments. Delivering 16W rated and 20W maximum acoustic output through an all-ABS polymer body, the unit combines dual voice-and-siren functionality to support safety marshals, security supervisors, and plant emergency response teams.

Industrial Emergency Evacuation Signaling

During plant emergencies, hazardous material alerts, or industrial safety incidents, clear and instantaneous auditory communication is vital. The PM-90S features an integrated siren signaling mode capable of sounding an immediate alert across shop floors, fabrication bays, and storage yards. Operating at up to 20W maximum output, the siren cuts through ambient machinery noise to alert workers. Facility personnel can instantly switch from siren mode to directional voice amplification to issue clear evacuation instructions. Voice transmission reaches 0.4 km under normal operational conditions and extends up to 1.0 km in quiet environments, allowing safety teams to broadcast egress routes to personnel across dispersed facilities.

Plant Muster Point Coordination and Assembly Marshaling

At outdoor assembly points and safety muster stations, emergency marshals must direct arriving personnel and conduct headcount roll calls. Conventional handheld megaphones cause arm fatigue during extended operations. The PM-90S utilizes an ergonomic shoulder sling layout that suspends the 2.2 kg ABS horn assembly comfortably across the operator's body while leaving the handheld dynamic microphone free for continuous speaking. The unidirectional dynamic microphone capsule focuses on the operator's voice while rejecting extraneous background noise such as idling equipment or environmental wind. A conveniently located volume control allows the marshal to fine-tune sound pressure levels for compact muster groups or wide assembly zones.

Perimeter Control and Logistics Yard Direction

Managing movement across expansive logistics hubs, commercial truck yards, and construction perimeters requires durable acoustic projection that withstands daily handling. Constructed from impact-resistant ABS polymer, the PM-90S is suited for tough industrial field environments. With an acoustic horn flare diameter of 250 mm and an overall length of 370 mm, it focuses sound forward to instruct vehicle drivers, yard marshals, and visiting contractors across distances of 0.4 km. Yard controllers can use the responsive volume switch to issue traffic flow directions, instruct dock staging, or coordinate vehicle turnaround without straining their voice.

Mobile Checkpoints and Vehicle-Supported Operations

In mobile security patrols, gate checkpoints, or remote perimeter monitoring where fixed public address systems do not exist, the PM-90S provides flexible operational power options. The unit can be operated independently on foot using 4 x UM-1 cells (they are not included) installed directly in the battery chamber. For extended static operations or vehicle patrols, it supports direct 6V DC power connection from a motor bike battery or vehicle electrical system. This adaptability ensures uninterrupted voice projection and siren capability during prolonged shifts.

Operational Deployment Summary

Deployment Scenario	Acoustic Function	Operational Range	Primary Ergonomic / Power Feature
Facility Emergency Evacuation	Integrated alert siren & voice direction	0.4 km (normal) / up to 1.0 km (quiet)	Dual signaling switch with up to 20W max output
Muster Point Safety Marshaling	Unidirectional dynamic voice broadcast	0.4 km standard radius	Shoulder sling suspension and separate microphone
Yard Traffic & Perimeter Direction	Focused forward voice projection	0.4 km to 1.0 km	250 mm horn flare diameter; all-ABS construction
Mobile Checkpoint Patrols	Siren alerts and public address	0.4 km to 1.0 km	4 x UM-1 cells (they are not included) or 6V DC vehicle battery

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SKU	KTI14004007P90S	KTI1400400AM15W	KTI14004005AM25	—
Brand	Hitune	FCG	Ahuja	—
Price (excl. GST)	₹ 2,782.00 excl. GST	₹ 37,125.00 excl. GST	₹ 4,435.60 excl. GST	—
GST %	18.00%	18.00%	18.00%	—
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Audible-Range	Upto 400 Meter	—	Upto 400 Meter	—
Battery	Non-Rechargeable	—	Rechargeable	—
Media Playback Features	Microphone Only	—	USB / SD / Aux / Record	—
Voltage	6 V	—	12 V	—
Watt	Upto 20 Watt	—	Upto 20 Watt	—
Certifications	—	—	—	—
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