Atlas Sound HLE-1, HLE-1T, HLE-2TC, HLE-2C, HLE-3C Users Guide

HLE-1(T), HLE-2TC/ HLE-2C

HLE-3C/ HLE-3TC/ HLE-3(T)

Connection To Amplifier

Exercise special care in removing the back cover of explosion-proof driver enclosure (Part 1) to avoid damaging machined surfaces. Prior to

re-assembly, make certain that joining surfaces of enclosure are 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.

Installation Of Matching Transformer

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: 2000Ω, 1000Ω, 500Ω, 250Ω, 125Ω, 85Ω, & 45Ω

Secondary
Winding: 4Ω, 8Ω, & 16Ω

Insertion loss: Less than 1⁄2dB at 1kHz

Termination: Solder Lugs

Shipping Weight: 1.5 lbs.

1/1

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 16Ω 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.

Impedance Tap, Ohms 70.7V Line, Watts 25V Line, Watts

45Ω – 15.0 Watts

85Ω 60.0 Watts 7.5 Watts

125Ω 40.0 Watts 5.0 Watts

250Ω 20.0 Watts 2.5 Watts

500Ω 10.0 Watts –

1000Ω 5.0 Watts –

2000Ω 2.5 Watts –

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

©2012 Atlas Sound L.P. All rights reserved. Atlas Sound is a trademark of Atlas Sound L.P. All other trademarks are the property of their respective owners. All specs are subject to change without notice. ATS004358 RevA 5/12

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