Atlas 60 and 30 Watt Explosion-Proof Loudspeakers HLE, HLE, MLE, HLE-30, MLE-30 Specification Sheet

EXPLOSION-PROOF LOUDSPEAKERS

HLE-1 Driver

HLE-1 Driver mounted to HLE/MLE-30 Horn

(order separately)

60 AND 30 WATT

HLE/MLE Series

FEATURES

• Explosion-Proof Loudspeakers for Signal and Communications Systems

• Listed by UL and CSA for Use in Hazardous/Combustible Environments (noted models)

• Available with Internally Mounted, Factory-Installed Transformer

• Choice of 60 or 30 Watt High-Intelligibility Driver in Cast Aluminum Housing

• Efficiency of Reflex-Style Projectors with Wide Angle or Circular Sound Dispersion

APPLICATIONS

Install HLE or MLE Series loudspeakers to efficiently and safely communicate in combustible
and dust-filled areas. All drivers comply with the regulations governing electrical equipment at
hazardous locations as set forth by the National Electric Code. Drivers are listed by UL and
CSA (HLE Series only). They are recommended for paging, signal and voice communication in
chemical processing, petroleum, natural resource exploration and atmospheres as listed in the
chart below.

GENERAL DESCRIPTION

Series HLE and MLE loudspeakers are explosion-proof compression driver/horn assemblies
engineered for high-efficiency voice and electronic signal communication in hazardous areas.
Drivers, which are protected within a rugged die-cast aluminum housing, are available in
60-watt (HLE Series) and 30-watt (MLE Series) power handling versions. Models with T suf
fix include a factory-installed, internally mounted transformer (Note: To meet UL requirements
transformer must be factory installed). All models are equipped with
adjustable mounting bracket.

1

⁄2" conduit access and an

-

TWO

Projector horns are available in two styles to meet dispersion requirements. Model HLE/MLE­30 is a high-quality, polycarbonate projector that creates a 120 ° x 60 ° pattern for wide area
coverage. Model HLE/MLE-32 is a spun aluminum bell providing a 95 ° circular distribution
emphasis.

Note: – For Canadian use (Price List page 17 Text)

HLE-1 Driver mounted to HLE/MLE-32

Horn (order separately)

Drivers and projector horns are ordered and shipped separately. For performance accuracy,
specifications are listed for assembled configurations.

MODEL POWER FREQ. SOUND INTERNAL ASSEMBLY

DRIVER HORN RATING RESPONSE LEVEL* SENSITIVITY** DISPERSION IMPEDANCE XFMR SIZE

HLE-1(T) HLE/MLE-30 60 Watts 250 Hz- 109dB -18dBm 120 ° x 60 ° 16 Ohms 60 Watt Driver & Horn
HLE-3(T) HLE/MLE-30 Cont. 12 kHz 108dB Model T-18
MLE-1(T) HLE/MLE-30 30 Watts 300 Hz 107dB -21dBm 120 ° x 60 ° 8 Ohms 30 Watt (35.6 x 15.2 x
MLE-3(T) HLE/MLE-30 Cont. 14 kHz 106dB Model T-20 44.5cm)
HLE-1(T) HLE/MLE-32 60 Watts 190 Hz- 112dB -16dBm 95 ° 16 Ohms 60 Watt Driver & Horn
HLE-3(T) HLE/MLE-32 Cont. 12 kHz 111dB Model T-18 161⁄2"Dia. x
MLE-1(T) HLE/MLE-32 30 Watts 200 Hz- 110dB -20dBm 95 ° 8 Ohms 30 Watt (42 x 54.6cm)
MLE-3(T) HLE/MLE-32 Cont. 10 kHz 110dB Model T-20

* Measured 1 Watt / 1 Meter.
** As microphone; re 10 dynes / cm2

DRIVER CLASS / GROUP FOR ATMOSPHERE CONTAINING:
HLE-1(T) Class 1 / Division 1 / Group C & D Gas Atmospheres (Including Ethyl, Ether, Gasoline Naphtha, Alcohols)

MLE-1(T)
HLE-3(T) Class 1 / Division 1 / Group B, C & D Gas Atmospheres (Including Ethyl, Ether, Gasoline Naphtha, Alcohols,

MLE-3(T) Butane, Propane) plus, Hydrogen, Gas and Vapor, (Manufactured Gas)

UNDERWRITERS' LABORATORY LISTINGS

(“T” versions only)

14"W x 6"H x 171⁄2”D

1601 JACK MCKAY BLVD. / ENNIS, TEXAS 75119 U.S.A.
TELEPHONE: [phone] / FAX [phone]

© 2007 Atlas Sound Printed in U.S.A. 000202 SL2-1421

Specifications subject to change without notice

AtlasSound.com

167

ARCHITECT AND ENGINEER SPECIFICATIONS

Explosion proof loudspeaker shall be UL Listed for use in specified
hazardous locations and/or combustible atmospheres as classified by
the National Electric Code.

UL approved compression driver for 60 Watt distributed application
shall be Atlas Sound Model HLE-1T or HLE-3T with internally mounted
60-watt transformer Model T-18. Transformer shall have primary
impedance taps at 2000, 1000, 500, 250, 125 and 85 with a 45 Ohm
tap for 45 Ohm line use only. Corresponding power taps for 70.7V line
use shall be 2.5, 5, 10, 20, 40 and 60. Secondary impedance shall be
4, 8 and 16 Ohms. For voice-coil circuit applications, UL Listed 60 Watt

Model HLE-1, or HLE-3 with 16 Ohm voice coil shall be specified.

UL approved compression driver for 30-watt distributed application
shall be Atlas Sound Model MLE-1T or MLE-3T with internally mounted
30 Watt transformer Model T-20. Transformer shall have primary
impedance taps at 2500, 1300, 666, 333, 167, 89 and 45 Ohms.

Corresponding power taps for 70.7V line use shall be 1.8, 3.7, 7.5, 15,
and 30. Power taps for 25V line shall be 1.89, 3.7, 7, and 15. Secondary
impedance shall be 8 Ohms. For voice-coil circuit applications, UL

Listed 30 Watt Model MLE-1, or MLE-3 with 8 Ohm voice coil shall be
specified.

Driver and transformer, where applicable, shall be mounted within a
heavy, cast aluminum housing. Voice coils shall be field-replaceable.
Projector horn shall be a reflex type with polycarbonate re-entrant
section. It shall be Atlas Sound Model HLE/MLE-30 for 120
dispersion or HLE/MLE-32 for 95˚ sound coverage. Driver and horn
assembly shall have a frequency response of _______ with sensitivity
of _______(measured at 10 dynes / cm
be a minimum of ________(measured at 1W/1M).

2

). Sound pressure level shall

˚

x 60˚ sound

Specifications subject to change without notice

1601 JACK MCKAY BLVD. / ENNIS, TEXAS 75119 U.S.A.
TELEPHONE: [phone] / FAX [phone]

© 2007 Atlas Sound Printed in U.S.A. 000202 SL2-1421

AtlasSound.com