Atlas Sound Speaker specifications Architect And Engineer Specifications

VT/VTF LOUDSPEAKER SPECIFICATIONS

		POWER TAPS	FREQ.			DIMENSIONS /	CAPACITOR
MODEL	TRANSFORMER	(WATTS)	RESP.	DISPERSION	SENSITIVITY	WEIGHT	(C)
VT(F)-158U	*	15 (8 Ohms)			96.9dB	VT Series:	N.A.
VT(F)-157UC	70.7 V	15, 8, 4, 2	600 Hz -	> 190°	(1 watt, 1 meter)	4-1/4" SQ x 3-1/4" D (108 x 83mm)	5 mfd.
VT(F)-152UC	25 V	15, 8 ,4 , 2	5500 Hz	(- 6dB pt.,		3.2 Lbs. (1.5 kg)	5 mfd.
VT(F)-27UC	70.7 V	2,1	(± 5dB)	1 and 2 kHz	UL: 90dB **	VTF Series:	1 mfd.
VT(F)-22UC	25V	2,1		octave	(1 watt, 10 feet)	6" SQ x 3-1/4" D (152 x 83mm)	1 mfd.
VT(F)-17UC	70.7	1, 1/2, 1/4		bands)		3.2 Lbs. (1.5 kg)	1 mfd.

* Without transformer, 8-ohm impedance. ** 3dB increment rating.

SOUND LEVEL REFERENCE INDEX FOR VT AND VTF SERIES LOUDSPEAKERS

(BASED ON UL RATING OF 90dB AT 1 WATT, 10 FEET)

DISTANCE

15-W INPUT

8-W INPUT

4-W INPUT

2-W INPUT

1-W INPUT

1/2-W INPUT

1/4-W INPUT

10' (3.0 m)

102.0dB

99.0dB

96.0dB

93.0dB

90.0dB

87.0dB

84.0dB

20' (6.1 m)

96.0dB

93.0dB

90.0dB

87.0dB

84.0dB

81.0dB

78.0dB

30' (9.1 m)

92.5dB

89.5dB

86.5dB

83.5dB

80.5dB

77.5dB

74.5dB

40' (12.2 m)

90.0dB

87.0dB

84.0dB

81.0dB

78.0dB

75.0dB

72.0dB

50' (15.2 m)

87.7dB

84.7dB

81.7dB

78.7dB

75.7dB

72.7dB

69.7dB

Dispersion

Freq.

Angle

(Hz)

Q

Di

(Degrees)

1000

1.83

2.61

360

2000

3.09

4.91

190

4000

4.54

6.57

125

VT / VTF SERIES

SIX

Polars Are Normalized to Zero on Axis

VT / VTF SERIES Harmonic Distortion

VT / VTF SERIES FREQUENCY RESPONSE

( 1 watt @ 1 meter )

ARCHITECT AND ENGINEER SPECIFICATIONS

VT/VTF Series. Audible signalling device shall be Atlas Sound Model VT-____ (surface mount) or VTF-____ (flush-recessed mount). Con-

tinuous power rating shall be ____ (15, 8, 4, 2, 1, 1/2, 1/4 watts) at

rated power. Frequency response shall be 600 to 5500 Hz (± 5dB). Sensitivity shall be 96.9dB (at 1 watt, 1 meter). Sound pressure level shall be ______ at a distance of _______ (see Sound Level

Reference Index). Dispersion shall be greater than 190° (-6dB point,

1 and 2 kHz octave bands). Model shall be water/moisture sealed and constructed of die-cast zinc. Unit shall operate within the temperature

range of 150°F (66°C) to -30°F (-35°C). VT Series shall be installed in_____ (a standard 4" SQ E.O. Box, Atlas Sound Model SFP semi-

flush plate, Model SE surface exterior backbox, or Models TVTA and VTC bi-directional housing and baffle cover). VTF Series shall be installed in a standard ______(4" or 4-11/16" SQ) backbox using

Atlas Sound Model______ (AR, MR) overlapping extension ring.

Dimensions shall be: VT Series, 4-1/4" SQ. x 3-1/4" D (108 x 83mm); VTF Series, 6" SQ. x 3-1/4" D (152 x 83mm). Finish shall be red or neutral gray.

Specifications subject to change without notice

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

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© 2001 Atlas Sound LP Printed in U.S.A. 000501 SL6-1439