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: 11 0º
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
15 121115 109 103 97
7.5 118 11 2 106 100 94
3.8 115 109 103 97 91
1.8 112 106 1
00 94 88
0.9 109 103 97 91 85
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. 201-934-8500; FAX: 201-934-9832; www.bogen.com
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