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Specifications subject to change without notice
© 2001 Atlas Sound LP 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) Q Di (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