Atlas Sound EZB51-4, BT720-4 specifications B Series, Features, Applications, General Description

4" HIGH COMPLIANCE LOUDSPEAKER	B Series
TRANSFORMER/BAFFLE ASSEMBLIES

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

B161-4	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
BT720-4
	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
EZB51-4	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.
		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	21⁄4"(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)	DISPERSION	130°/ -6dB, 2kHz
	MAGNET	10 oz. Ceramic		Octave Band
	V.C. DIAMETER	1" (25mm)	DEPTH	21⁄4"(57mm) (less Xfmr)

ONE

Specifications subject to change without notice

TELEPHONE: (800) 876-3333 / FAX (800) 765-3435	AtlasSound.com
1601 JACK MCKAY BLVD. / ENNIS, TEXAS 75119 U.S.A.

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© 2004 Atlas Sound Printed in U.S.A. 000904 ATS001653 RevC 9/04 SL1-1368