Atlas Sound Speaker User Manual

Page 3

Specifications subject to change without notice

Printed in U.S.A.

000501

SL6-1439

317

SIX

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

Specifications subject to change without notice

ARCHITECT AND ENGINEER SPECIFICATIONS

Dispersion

Freq.

Angle

(Hz)

(Degrees)

1000

1.83

2.61

360

2000

3.09

4.91

190

4000

4.54

6.57

125

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.

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

VT / VTF SERIES FREQUENCY RESPONSE

VT / VTF SERIES Harmonic Distortion

( 1 watt @ 1 meter )

VT / VTF SERIES

Polars Are Normalized to Zero on Axis