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67
Six
15 Watt Compression Driver Loudspeakers
VT Series / VTF Series Patented and the proven performance standard around the world for effective sound and
electronic signal transmission of emergency voice communications and tone signaling. Cost-effective series function
as protective warning devices in intercom systems and as communication system loudspeakers in multi-occupancy
and expanded space areas including high-rise residences, public buildings, health-care and educational facilities,
banks, shopping areas, distribution centers, and transportation terminals. High-efficiency compression driver provides
optimum acoustic conversion efficiency. Die-cast water sealed construction withstands vandalism, vermin, moisture,
corrosion, and vibration.
Both the VT Series and VTF Series include a 70.7V or 25V transformer model. All Models include a 5 mfd capaci-
tor. VT Series are surface mounting units measuring 4
1
⁄4" Square x 3
1
⁄4" Depth. VTF Series are recessed mounting
versions measuring 6" Square x 3
1
⁄4" Depth. Both series install to a 2
1
⁄8" Depth x 4" E.O. Box (not included); VTF Series
also requires Model A-R adapter ring. Models are available with choice of finish Red(R) or Neutral Gray(N). When used
with compatible control equipment all models comply with UL Standard 1480 — Speakers for Fire Protective Signaling
Systems.
Model UL Transformer Power Taps
(Watts)
Frequency
Response
Dispersion Sensitivity
VT-157UCN
1480 70.7V 2, 4, 8, &
15 watts
600 Hz - 5500 Hz
(±5 dB)
>190˚
(-6dB point,
1 and 2 kHz
octave bands)
96.9 dB
(1 W / 1 M)
UL: 90 dB*
(1 W / 1 M)
VT-157UCR
VTF-157UCN
VTF-157UCR
VT-152UCN
1480 25V 2, 4, 8, &
15 watts
VT-152UCR
VTF-152UCN
VTF-152UCR
* 3 dB increment rating.
2 Watt Re-Entrant Cone Loudspeakers
SVT-27UCS Surface mount unit features a cone loudspeaker with integral re-entrant protective dome built into the
housing for environment resistance, optimum power output and high intelligibility. Space-efficient design is recom-
mended for use in demanding localized area emergency communications, electro-acoustic signaling, commercial
sound, and intercom applications 2 watt power handling designed for low ambient areas including executive offices,
condominiums, apartments, dormitory rooms, motel/hotel rooms, hospital suites, and elevator cabs. Includes 70.7V
transformer and 1-mfd DC blocking capacitor. SVT-27UCS is a surface mount 4
1
⁄4" Square x 3
1
⁄8" Deep unit designed
for installation in standard 4" square E.O. Boxes (not included). Weather sealed housing is Noryl
®
plastic. Neutral Gray
finish. When used with compatible control equipment, SVT Series comply with UL Standard 1480—Speakers for Fire
Protective Signaling.
Model Frequency
Response
Dispersion Sensitivity
SVT-27UCS
500 Hz -5000 Hz (±5 dB) >190˚ (-6 dB point, 1 and 2 kHz octave bands) 96.9 dB (1 watt, 1 meter)
UL: 90 dB (1 watt, 10 ft)**
** 3 dB increment rating.
Voice / Tone
™
Emergency Loudspeakers
VT Series
VTF Series
SVT Series
