Atlas Sound B161-4, BT720-4, EZB51-4 specifications Architect and Engineer Specifications

	Model	Loudspeaker	Baffle	XFMR	Primary Taps	Core Size	XFMR Freq.	Insertion	Tile Bridge / Drywall Trim Ring	Enclosure/Mount-
							Response	Loss	(Order Seperately)	ing Ring
★
	B51-4	4" (FC104)	51-4	LT72 (70.7V/25V)	.25, .5, 1,2, & 4	1/2" X 5/8" (13MM	100Hz - 10kHz	1.5dB	81-4, 76-4	(EZ)96-4, (EZ)96-4
						X 16MM)	(+/- 1.5dB)
	EZB51-4	4" (FC104)	T51-4	LT72 (70.7V/25V)	.25, .5, 1,2, & 4	1/2" X 5/8" (13MM	100Hz - 10kHz	1.5dB	Not Required (EZ Mounting rail	N/A
						X 16MM)	(+/- 1.5dB)		system is included)
	BT51-4	4" (FC104)	T51-4	LT72 (70.7V/25V)	.25, .5, 1,2, & 4	1/2" X 5/8" (13MM	100Hz - 10kHz	1.5dB	PR411, TR411	(EZ)E410*, E410-11*
						X 16MM)	(+/- 1.5dB)
	B161-4	4" (FC104)	161-4	LT72 (70.7V/25V)	.25, .5, 1,2, & 4	1/2" X 5/8" (13MM	100Hz - 10kHz	1.5dB	N/A	198-4**, SE198-4
						X 16MM)	(+/- 1.5dB)
	EZB161-4	4" (FC104)	T161-4	LT72 (70.7V/25V)	.25, .5, 1,2, & 4	1/2" X 5/8" (13MM	100Hz - 10kHz	1.5dB	Not Required (EZ Mounting rail	N/A
						X 16MM)	(+/- 1.5dB)		system is included)
	BT710-4	4" (FC104)	T710-4	LT72 (70.7V/25V)	.25, .5, 1,2, & 4	1/2" X 5/8" (13MM	100Hz - 10kHz	1.5dB	PR411, TR411	(EZ)E410*, E410-11*
						X 16MM)	(+/- 1.5dB)
	BT720-4	4" (FC104)	T720-4	LT72 (70.7V/25V)	.25, .5, 1,2, & 4	1/2" X 5/8" (13MM	100Hz - 10kHz	1.5dB	PR411, TR411	(EZ)E410*, E410-11*
						X 16MM)	(+/- 1.5dB)
★
	BT720-4-T47	4" Coaxial	T720-4	HT47(70.7V)	.5, 1,2, & 4	1/2" X 5/8" (13MM	60Hz - 12kHz	1.5dB	PR411, TR411	(EZ)E410*, E410-11*
		(FA134)				X 16MM)	(+/- 1dB)

★FA81-6 Tile bridge may be used in conjunction with E410 or E410-11 (non EZ version) enclosures for drop tile applications

ARCHITECT AND ENGINEER SPECIFICATIONS

Loudspeaker package shall be Atlas Sound Model ____ (B51-4,

EZB51-4, BT51-4, B161-4, EZB161-4, BT710-4, BT720-4, BT720-4- T47) or approved equal.

Factory assemblies shall be comprised of an Atlas Sound Model FC104, 4” high compliance loudspeaker or FA134, 4” coaxial loudspeaker, 70.7/25V or 70.7V transformer and baffle.

Models including high compliance Model FC104 Loudspeaker shall have wide angle sound distribution with 135° dispersion (-6dB, 2 kHz octave band). The cone shall be a damped, high compliance type with smooth extended response over a range of 150 Hz to 17 kHz and a power rating of not less than 10 watts program. The magnet shall be a 10 ounce (283g) ceramic type. The 1” (25mm) voice coil shall operate in a magnetic field of at least 10,500 gauss. Voice coil impedance shall be 8 ohms. Sensitivity shall be 94dB [measured 1W/1M]. Free air resonance shall be 101 Hz.

Model including high Model FA134 Coaxial Loudspeaker shall have wide angle sound distribution with 130° dispersion (-6dB, 2 kHz octave band). The cone shall be a damped, polypropylene type with smooth extended response over a range of 110 Hz to 20 kHz and a power rating of not less than 15 watts program. The magnet shall be a 10

ounce (283g) ceramic type. The 1” (25mm) woofer voice coil shall operate in a magnetic field of at least 11,300 gauss. High frequency device shall be a 1” (25mm) PEI tweeter. Crossover frequency shall be 8000Hz. Nominal impedance shall be 8 ohms. Sensitivity shall be 88dB [measured 1W/1M]. Free air resonance shall be 80 Hz.

Loudspeaker shall include a pre-mounted ____ (70.7/25V or 70.7V)

transformer with power taps of ____ (.25, .5, 1, 2, 4 – LT72, .5, 1, 2,

4 – HT47). Transformer frequency response shall be ____ (+/- 1.5dB

@100 Hz to 10KHz – LT72 or +/-1dB @ 60 Hz to 12 KHz-HT47). Insertion loss shall not exceed ____ (+1.5dB-LT72 or +1dB-HT47). Assemblies without support rails shall mount to enclosure Model ____

or mounting ring Model ____ or tile bridge Model ____ or approved equal.

Enclosures shall be Model __________ (96-4, 96-4X, 198-4) and shall

be listed by Underwriters Laboratories (UL 1480 General Signaling and accepted under UL 2043 for use in air handling “plenum” spaces). Assemblies with support rails shall include pre-mounted brackets and shall transfer the loudspeaker package weight to the ceiling system support rails.

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.

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