Atlas Sound B SERIES BT720-4 User Manual

Atlas Sound Microphones

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1601 JACK MCKAY BLVD. / ENNIS, TEXAS 75119 U.S.A.

TELEPHONE: (800) 876-3333

/ FAX (800) 765-3435

AtlasSound.com

Specifications subject to change without notice

Printed in U.S.A.

000904 ATS001653 RevC 9/04

SL1-1368

ONE

4" HIGH COMPLIANCE LOUDSPEAKER

TRANSFORMER/BAFFLE ASSEMBLIES

B Series

FEATURES

• High compliance 4" loudspeaker for full-range audio reproduction in background music
and paging systems
• Factory-assembled loudspeaker packages save time and money
• Choice of eight loudspeaker/transformer/baffle configurations
• Selection includes models with easy-to-install torsion spring grilles and models with the
cost-efficient, EZ-Mount installation system

APPLICATIONS

Save time and money by installing B Series 4" diameter loudspeaker packages for background
music and public address systems wherever the functional and architectural integrity of an
unobtrusive size ceiling assembly is desirable. Full-range, high-quality sound reproduction is
ideal for professional offices, reception areas, waiting rooms, corridors and balconies. Choose
from 8 factory-assembled loudspeaker/transformer models with standard baffle or easy-to-install
torsion spring grille. For suspended ceiling installations utilize models with the time saving EZ-
Mount installation system.

GENERAL DESCRIPTION

Attractive B Series loudspeaker assemblies combine the sound performance of a full range
4" high compliance loudspeaker with the job site convenience and economy of a factory-
assembled loudspeaker, transformer and baffle. Models incorporate the popular Atlas Sound
FC104 high performance loudspeaker, recognized for full-range voice and music reproduction.
Unit provides wide-angle sound dispersion to achieve desired coverage with fewer loudspeak-
ers in distributed systems. Each loudspeaker employs a 10 ounce ceramic magnet and a
damped, high-compliance cone to provide excellent low-frequency reproduction with smooth
extended response. Package includes factory-mounted, dual-voltage 70.7/25V or 70.7V trans-
former and round or square grille with screw mount or torsion spring (T) installation where
noted. Two models are equipped with the patented EZ-Mount support system. EZB Models are
designed for application in suspended ceiling tile installations which do not require a protective
enclosure. Assemblies include pre-mounted EZ brackets which are slotted to accept EZ mount
support rails (provided). Rails attach with wingnuts and adjust vertically to accommodate
varying ceiling depth requirements (Note: No tile bridge is required). All B Series packages are
shipped assembled and ready for installation.

B161-4

BT720-4

EZB51-4

FC104 LOUDSPEAKER SPECIFICATIONS

SPEAKER SIZE

4" (102mm)

V.C. IMPEDANCE 8 ohm nominal

FLUX DENSITY

10,500 Gauss

SENSITIVITY

94dB (1W, 1M)

POWER RATING

10 Watts Program

RESONANCE

101 Hz

FREQ. RESPONSE 150Hz-17kHz

DISPERSION

135

/ -6dB, 2kHz

MAGNET

10 oz. Ceramic

Octave Band

V.C. DIAMETER

1" (25mm)

DEPTH

⁄

"(57mm)

(less Xfmr)

FA134 LOUDSPEAKER SPECIFICATIONS

SPEAKER SIZE

4" (102mm)

V.C. IMPEDANCE 8 ohm nominal

FLUX DENSITY

11,300 Gauss

SENSITIVITY

88dB (1W, 1M)

POWER RATING

15 Watts Program

RESONANCE

80Hz

FREQ. RESPONSE 110Hz-20kHz ((+/-5dB)