Bogen SPT15A User manual

The Bogen SPT15A and SP158A are compact, high
intelligibility, reentrant type loudspeakers, designed
for one-way or two-way sound and communication
systems. Their sturdy, weatherproof, all-metal con-
struction is ideal for indoor and outdoor use in
industrial plants, warehouses, schools, construction
sites, transportation terminals, and recreational
areas.
The Model SPT15A has a built-in, rotary impedance
selector switch for matching the speaker power
requirements to a 25V or 70V constant-voltage line.
The model SP158A has an 8-ohm impedance only.
• High intelligibility and efficiency; ideal for both
one-way and talk back applications
• Weatherproof, all-metal construction
•15 watts; 25/70 volt (SPT15A) or 8-ohm
(SP158A) operation
• Tap settings for 70V: 15, 7.5, 3.8, 1.8, 0.9 watts;
for 25V: 15, 7.5, 1.8, 0.94, 0.46 watts
• Rotary tap impedance selector on SPT15A
• Tilt and swivel base for easy positioning
• Screw terminals make installation fast and easy
• All-purpose mounting bracket
• Self-aligning, field replaceable diaphragm
• Mocha enamel finish
• Limited lifetime warranty
• Mountable to I-beam flange using Bogen’s BC1
Beam Clamp (sold separately)
• Mountable to electrical box using Bogen’s
HSES10 mounting strap (sold separately)
• Terminal Cover (TCSPT1) allows connection of
conduit fittings to horn speakers (sold separately)
Features
Description
Reentrant Horn
Loudspeakers
Models SPT15A
and SP158A
Specifications subject to change without notice.
© 1995 Bogen Communications, Inc.
54-7612-05D 0904

Power Rating (RMS): 15 watts continuous, 20 watts equalized
Frequency Response: 275 Hz to 14 kHz
Impedance:
SPT15A — 25/70 volts
SP158A — 8 ohms
Sound Pressure Level: 121 dB @ four feet on axis with 15 watt input
@ 1000 Hz
Dispersion: 110º
Sensitivity as Microphone: -22 dBm [Ref: 10 dynes/cm2]
Dimensions: 9" Diameter x 9-1/4" D
Product Weight:
SPT15A — 4 lb.
SP158A — 3 lb.
Finish: Textured mocha enamel
Impedance Selector Switch Settings (SPT15A only): 25V @ 15, 7.5, 1.8, 0.94, 0.46 watts
70V @ 15, 7.5, 3.8, 1.8, 0.9 watts
Sound Pressure Level in dB @ 1000Hz: Watts Feet on Axis
Input: 4 8 163264
15121115109 103 97
7.5 118112106 100 94
3.8 115109 103 97 91
1.8 112106 100 94 88
0.9 109 103 97 9185
0
. 46 106 100 94 88 82
Technical
Specifications
The loudspeaker shall be a Bogen Model ____ (spec-
ify SPT15A or SP158A), or approved equal, reentrant
type horn loudspeaker.The frequency response shall
be 275 Hz to 14 kHz. Rated power output shall be
15 watts, RMS continuous. Dispersion shall be 110º.
Sound pressure level, measured four feet on axis with
15 watt input @ 1000 Hz, shall be at least 121 dB.
Use for SPT15A. The unit shall incorporate a
seven-position weather-sealed switch, to allow
matching the loudspeaker to a 25V or 70V constant-
voltage line. Power handling capacity shall be
adjustable at 70V to 0.9, 1.8, 3.8, 7.5, or 15 watts, and
at 25V to 0.46, 0.94, 1.8, 7.5, or 15 watts.
Use for SP158A. The unit shall have an impedance
of 8 ohms.
The loudspeaker shall be of weatherproof, all-metal
construction, with driver enclosed within a weather-
proof housing. The loudspeaker shall include a self-
aligning, field-replaceable diaphragm.
Screw terminals shall be provided for connection to
the audio line. A plastic cover shall be provided to
protect the connectors and impedance selector
switch, and provide strain relief for the audio line.
An all-purpose mounting bracket shall provide pre-
cise positioning in the vertical and horizontal planes
with a single adjustment. The bracket shall include
banding slots to permit mounting the loudspeaker on
beams or pillars. Bracket and loudspeaker shall be fin-
ished in textured mocha enamel. The unit shall mea-
sure 9" diameter by 9-1/4" D. Product weight shall be
________ (insert 4 lb. for SPT15A, 3 lb. for SP158A).
Architect
and Engineer
Specifications
50 Spring Street, Ramsey, NJ 07446, U.S.A.
Tel. [phone]; FAX: [phone]; www.bogen.com