The AtlasIED MLE-3T Explosion-Proof Compression Driver is a professional 30-watt loudspeaker driver designed for voice paging, audible signaling, and emergency communications in classified hazardous locations. Built with a rugged die-cast aluminum enclosure and a factory-installed 70.7V transformer, the MLE-3T provides high-intelligibility audio performance for industrial facilities where combustible gases or vapors may be present.
Designed for Class I, Division 1, Groups B, C, and D hazardous locations, the AtlasIED MLE-3T is suitable for appropriately engineered communication systems in chemical processing facilities, refineries, industrial plants, and other environments requiring certified explosion-proof audio equipment.
The MLE-3T supports compatible AtlasIED HLE/MLE-30 and HLE/MLE-32 projector horns, allowing installers to select the sound coverage pattern best suited to the application. Its integrated transformer, factory-installed pipe seal with field wiring leads, and adjustable mounting bracket provide installation flexibility for professional hazardous-location sound systems.
Important: The MLE-3T is a compression driver assembly. The projector horn is sold separately and must be ordered to complete the loudspeaker installation.
30-Watt Explosion-Proof Driver for Hazardous Locations
The AtlasIED MLE-3T features a 30W continuous-duty compression driver enclosed in a heavy-duty die-cast aluminum housing.
Its construction is designed for professional voice communication and electronic signaling in hazardous industrial environments where ordinary commercial paging loudspeakers may not be suitable.
The MLE-3T is UL Listed for specified Class I, Division 1, Groups B, C, and D locations, subject to the applicable certification and installation requirements.
These classifications cover specified flammable gas and vapor environments, including hydrogen-related Group B applications.
All hazardous-location installations must follow the manufacturer's instructions, applicable electrical codes, and the site's approved area classification.
Factory-Installed 70.7V Transformer with Selectable Power Taps
The MLE-3T includes a factory-installed, internally mounted transformer for use with compatible 70.7V distributed paging and signaling systems.
The transformer provides selectable power taps for adjusting the output level of individual loudspeakers within a multi-speaker industrial communication system.
Available 70.7V transformer taps include:
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1.8 watts
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3.7 watts
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7.5 watts
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15 watts
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30 watts
The factory-installed transformer is an important part of the manufacturer's certified assembly. AtlasIED specifies that the transformer must be factory installed to meet applicable UL requirements.
High Speech Intelligibility and Flexible Horn Coverage
The AtlasIED MLE-3T provides a published frequency response of 300 Hz to 14 kHz when used in the specified horn configuration.
Its high-efficiency compression driver design supports clear speech announcements, warning signals, and industrial paging in facilities with challenging ambient noise conditions.
Two compatible AtlasIED projector horns are available:
HLE/MLE-30 Wide-Angle Projector Horn
The HLE/MLE-30 provides broad directional sound coverage for industrial areas requiring wide horizontal and vertical dispersion.
HLE/MLE-32 Circular Projector Horn
The HLE/MLE-32 provides approximately 95° circular sound coverage for installations where a more uniform circular dispersion pattern is preferred.
Published sensitivity depends on the selected horn:
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106 dB with the HLE/MLE-30
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110 dB with the HLE/MLE-32
Both horn models are sold separately.
Rugged Industrial Construction and Installation Features
The MLE-3T is engineered for installation in approved hazardous-location communication systems.
Its die-cast aluminum housing protects the compression driver, while the factory-installed pipe seal and integral field wiring leads support installation according to the manufacturer's instructions.
An adjustable mounting bracket allows the assembled loudspeaker to be aimed toward the intended listening area.
The combination of industrial construction, certified driver design, and selectable horn coverage makes the MLE-3T suitable for demanding professional paging and signaling installations.
AtlasIED MLE-3T Key Features
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30W continuous explosion-proof compression driver
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Designed for professional industrial paging and audible signaling
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UL Listed for specified Class I, Division 1, Groups B, C, and D hazardous locations
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Suitable for approved hydrogen-related Group B environments
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Heavy-duty die-cast aluminum driver housing
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Factory-installed, internally mounted 70.7V transformer
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Five selectable 70.7V power taps: 1.8W, 3.7W, 7.5W, 15W, and 30W
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Frequency response of 300 Hz to 14 kHz
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High-efficiency voice communication performance
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106 dB sensitivity with HLE/MLE-30 horn
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110 dB sensitivity with HLE/MLE-32 horn
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Compatible with two UL Listed AtlasIED projector horn models
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Choice of wide-angle or circular sound dispersion
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Factory-installed pipe seal with field wiring leads
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Adjustable mounting bracket
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Designed for commercial and industrial hazardous-location audio systems
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Projector horn sold separately
AtlasIED MLE-3T Technical Specifications
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Specification
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Details
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Manufacturer
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AtlasIED
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Model
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MLE-3T
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Product Type
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Explosion-Proof Compression Driver
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Continuous Power Rating
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30 Watts
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Transformer
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Factory-Installed 70.7V Transformer
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70.7V Power Taps
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1.8W, 3.7W, 7.5W, 15W, 30W
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Frequency Response
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300 Hz – 14 kHz
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Sensitivity with HLE/MLE-30
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106 dB
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Sensitivity with HLE/MLE-32
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110 dB
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Compatible Projector Horns
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HLE/MLE-30 and HLE/MLE-32
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HLE/MLE-30 Coverage
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Wide-Angle Projector
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HLE/MLE-32 Coverage
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95° Circular
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Driver Housing
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Die-Cast Aluminum
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Wiring
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Integral Field Wiring Leads
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Pipe Seal
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Factory Installed
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Mounting
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Adjustable Mounting Bracket
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Hazardous-Location Classification
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Class I, Division 1, Groups B, C, D
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Manufacturer-Listed Safety Standard
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UL 1203
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Warranty
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60 Months from Date of Purchase
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Projector Horn Included
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No — Sold Separately
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Dimensions and coverage characteristics depend on the separately selected projector horn. Verify the complete assembled configuration before installation.
Compatible AtlasIED Projector Horns
The MLE-3T is designed for use with the following AtlasIED explosion-proof projector horns:
AtlasIED HLE/MLE-30 Wide-Angle Horn
A polycarbonate projector horn designed for broad directional sound distribution in industrial paging and communication applications.
AtlasIED HLE/MLE-32 Circular Horn
A spun aluminum projector horn designed to provide approximately 95° circular sound coverage.
Safety Requirement: Only the HLE/MLE-30 and HLE/MLE-32 horns are UL Listed for use with the AtlasIED HLE and MLE explosion-proof driver series. Use the approved driver-and-horn combination and follow the manufacturer's installation instructions.
Typical Applications
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Chemical processing plants
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Petroleum refineries
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Oil and gas processing facilities
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Industrial manufacturing facilities
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Hazardous-location paging systems
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Industrial warning and audible signaling systems
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Classified combustible gas and vapor environments
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Hydrogen-related industrial applications
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Industrial emergency communication systems
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Professional distributed paging systems in approved hazardous areas
Why Buy the AtlasIED MLE-3T from Audio Supply?
Audio Supply supplies AtlasIED industrial loudspeakers, explosion-proof compression drivers, commercial paging equipment, and professional audio accessories for industrial and institutional sound systems.
Our team can help you identify compatible AtlasIED projector horns, commercial paging amplifiers, and audio system components for your MLE-3T installation. Final hazardous-location equipment selection and installation should be verified by qualified personnel.
