Atlas Sound HLE-3C Dépliant

Exercise special care in removing the back cover of explosion-proof driver enclosure, (Part 1) to avoid dam-
aging machined surfaces. Prior to re-assembly, make certain that joining surfaces of enclosure is free of dirt.
Tighten all cover bolts completely. To provide the specified protection in hazardous locations, please note
that no compound of any type is to be applied on machined flange.

Atlas Sound Model T-18, 60 Watt line matching transformer is listed by UL and C.S.A. for installation within
the explosion-proof driver enclosure.

Primary Winding:

2000/1000/500/250/125/85/ (45 Ohms)

Secondary Winding:

4, 8 & 16 Ohms

Insertion loss:

Less than 

1

⁄

2

dB at 1 kHz

Termination:

Solder Lugs

Shipping Weight:

1.5 Lbs.

Within the explosion-proof housing, on the back side of the magnetic assembly of the drive unit, two holes
are pre-drilled for fastening the T-18 line matching transformer with 8-32 screws.

When used with the Atlas Sound HLE-Series speakers, the 16 Ohm secondary winding of the transformer
should be connected to the voice coil leads of the driver.

The following illustrates impedance taps and power selection for connection of the primary winding of the
transformer to the output of the communications system amplifier.

C.S.A. reference guide: 386-0-0.8   Class: 2268

45

–

15.0

85

60.0

7.5

125

40.0

5.0

250

20.0

2.5

500

10.0

–

1000

5.0

–

2000

2.5

–

1601 JACK MCKAY BOULEVARD ENNIS, TEXAS U.S.A.   •    TELEPHONE: (800) 876-3332   •   FAX: (800) 765-3435

©2001 ATLAS SOUND LP

Printed in U.S.A.

00801 

ATS000707 RevB 8/01

PN 316972