When the alarm goes off, people look for one thing: someone who sounds like they know what to do. In a fire, a gas leak, a stampede at a festival or a crowd at a factory gate, a clear voice that carries tells people where to go and keeps them calm. A good megaphone gives your security officers, fire wardens and marshals that voice, without a power point, a network or a control room. This field guide covers the KT India range of megaphones, portable PA systems, hand sirens and accessories, how to choose the right one, how to use a megaphone properly, and what to keep at different kinds of sites.

One clear voice that carries over the crowd is worth more than ten people shouting.
KT India megaphone and crowd communication range

Product	Best for	Key details
Megaphone AM 22HSD Ahuja	Security teams and daily crowd control	20 W, built-in siren, Class-D amplifier, shoulder sling
Megaphone AM 24DP Ahuja	Repeating a recorded instruction	20 W, USB MP3 playback, recording mic, siren
Megaphone AM 25DP Ahuja	Longer messages and evacuation loops	25 W, siren, 240 s voice recording, USB MP3 playback
Ahuja AM 25DPM PA Megaphone	Campuses that need range and playback	25 W, USB and SD playback, recording, siren, about 400 m voice range
Megaphone PM90S Hitune	Schools and outdoor activities	Lightweight 20 W with built-in siren
Megaphones HM 21SU Hi Tune Bass	Field teams who also play pre-recorded audio	MP3, USB and AUX input, siren
Megaphone 220U Mega	Field publicity and crowd control on a budget	Lightweight, built-in siren
Megaphone MG 220 D Mega	Industrial sites and large events	25 W, about 400 m range, tough ABS body
Megaphone MG 220 UR Mega	Gatherings where messages repeat	25 W with recording, about 200 m range
Megaphone MP89U Make Mega	Mounting on a patrol vehicle	Dual power, tone control, weather-resistant finish
Megaphone MP 99 USB Make Mega	Rallies, sports days and big grounds	40 W, dual mic inputs, portable
MP 99UEC Portable P.A. System	A small PA you can carry	40 W, dual mic input, built-in rechargeable battery
PESO Approved Flameproof Megaphone 15W	Refineries, gas plants and fuel depots	Flameproof, 15 W, recording; listed as PESO approved
ERTL Approved Flameproof Portable Megaphone 15W	Hazardous areas where ERTL approval is asked for	Flameproof portable megaphone, 15 W
Battery for Megaphone Ahuja LB20	Keeping Ahuja megaphones ready	LB20 rechargeable pack with charger for AM 22HSD and AM 25DP
Ahuja Portable PA system WP225	Briefings and assembly-point announcements	Ahuja portable PA system for briefings
Trolley Speaker BTA 550 Ahuja	Queues, gates and small events	30 W trolley speaker, wireless mic, Bluetooth, MP3, rechargeable
Trolley Speaker BTA 880 Ahuja	Bigger crowds that stay in one place	50 W, 12 in woofer, dual wireless mics, rechargeable
Takara T 6112 12 Inch Portable Trolley Speaker	Long events away from mains power	12 in, UHF wireless mics, Bluetooth, recording, about 5 h battery
Hand Operated Siren Kheraj 0.5 Km	Power-free alarm in a small plant	Wall-mounted hand siren, about 0.5 km range
Hand Operated Siren Jay Kay 1km With Stand	Evacuation alarm for medium sites	Hand siren on a stand, about 1 km range
Hand Operated Siren 1.5 Km with Stand	Large plants and townships	Floor-mounted hand siren, about 1.5 km range
Emergency Hooter System	Starting the evacuation from anywhere	Hooter with wireless triggers, remote access and flashing light
Flameproof Horn Speaker ATS 4025 IIC	Fixed announcements in hazardous zones	30 W flameproof horn speaker, IP65, gas group IIC, T6
KTI Traffic Baton Rechargeable With Torch, Siren	Marshals guiding people and vehicles at night	Rechargeable baton with torch, light modes and siren
Traffic Baton Stop, Go Rechargeable	Stopping and releasing vehicles at gates	Rechargeable STOP and GO baton

How to choose a megaphone

• Power and range. 15 to 20 W suits a school ground, a building lobby or a gate. 25 W megaphones such as the Ahuja AM 25DP or MG 220 D carry a few hundred metres outdoors. For rallies and big grounds, step up to the 40 W MP 99 USB.
• Siren. Most models have a built-in siren. It grabs attention before you speak and doubles as an alarm.
• Record and play. A recording function lets you store "Please leave by the nearest exit and go to the assembly point" and play it on a loop, so the officer's hands and voice are free. USB and SD playback lets you load a prepared message in several languages.
• Hazardous areas. In refineries, gas bottling plants, fuel depots and chemical stores, use a flameproof megaphone, not a standard one. Ask for the approval certificate that your site requires.
• Battery. Choose a rechargeable model or keep a spare battery pack. A megaphone with flat cells is useless in an emergency.
• Megaphone or trolley speaker? A megaphone moves with the officer. A trolley speaker with a wireless mic covers a crowd that stays in one place, such as an assembly point, a queue or a stage.

How to use a megaphone in an emergency, step by step

1. Get attention first. Sound the siren for two or three seconds, then stop. Silence after a siren makes people listen.
2. Hold it right. Keep the mic close to your mouth and point the horn at the people you are talking to, slightly above their heads. Don't point it at someone's ear at close range.
3. Speak slowly, in short lines. Use the language people understand: "Fire in Block B. Walk to Gate 2. Do not run." Repeat it. Shouting through a megaphone distorts the sound, so use a normal, firm voice.
4. Give a direction, not just a warning. Point with your free arm or a traffic baton, and tell people exactly where to go.
5. Use the recorded message when you need to move or help someone, so the instruction keeps playing.
6. Position yourself well. Stand at a junction, a gate or on a raised step where people can see you, with your back to a wall, not in the flow of the crowd.
7. Hand over to the assembly point. At the muster point, switch to a portable PA system for the headcount and further instructions.

In hazardous areas, use a flameproof megaphone that is approved for the zone.
Kit by site type

• Factories and warehouses: one Ahuja AM 22HSD or AM 25DP per fire warden, a 1 km hand-operated siren that works without power, and an emergency hooter system to start the evacuation.
• Refineries, chemical and gas plants: PESO or ERTL approved flameproof megaphones for the process areas and flameproof horn speakers for fixed announcements.
• Large plants, ports and townships: a 1.5 km hand siren, 25 W megaphones with recording such as the AM 25DPM, and a vehicle-mounted MP89U on the patrol jeep.
• Schools and colleges: a light Hitune PM90S for sports days and drills, and an Ahuja BTA 550 trolley speaker for the assembly ground.
• Hospitals, malls and offices: HM 21SU megaphones at the security desk, with pre-recorded evacuation messages loaded on USB.
• Events, temples, rallies and stadiums: 40 W MP 99 USB megaphones for marshals, Takara T 6112 or BTA 880 trolley speakers at queues and gates, and STOP and GO batons for the parking teams.

For a crowd that stays put, a trolley PA speaker covers more people for longer.
Keep them ready
Store megaphones at the security cabin, fire control room and each warden's station, where they can be picked up in seconds. Test every unit at the start of the month: siren, voice and recorded message. Charge rechargeable models after every drill and event, and replace dry cells every few months even if they still work. Keep spare battery packs for the Ahuja models. Check the horn and handle for cracks after any drop. Re-record the evacuation message whenever the assembly point or exit routes change, and record it in every language your workforce speaks.
Frequently asked questions
How far does a megaphone carry?
It depends on power, wind and background noise. A 25 W megaphone is typically heard a few hundred metres away in open ground, much less inside a noisy plant. Test yours at the actual site before you rely on it.
Do we still need a megaphone if we have a PA system?
Yes. A fixed PA system can fail with power or wiring in a fire. A battery megaphone goes wherever the people are, including the assembly point and the gate.
Which megaphone for a hazardous area?
Only a flameproof model approved for your zone. A standard megaphone can be an ignition source near flammable gas or vapour.
How many do we need?
At least one for every fire warden or area in-charge, one at the security cabin and one at each assembly point, plus a spare.
Give your team a voice that carries. Browse the full range of megaphones and hand-operated sirens, or use Enquiry Now on any product page for bulk pricing and help choosing the right kit for your site.