Bogen SP308A User manual

The Bogen SPT30A and SP308A are compact, high
intelligibility, reentrant type loudspeakers, designed for
one-way or two-way sound and communication sys-
tems. Their sturdy, weatherproof, all metal construc-
tion is ideal for indoor and outdoor use in industrial
plants, warehouses, schools, construction sites, trans-
portation terminals, and recreational areas. Screw ter-
minals make installation fast and easy.
The Model SPT30A has a built-in, variable impedance
selector switch for matching the speaker power
requirements to a 25V or 70V constant-voltage line.
The model SP308A has an 8-ohm impedance only.
Engineered to simplify installation (with a uniquely
designed all-purpose mounting bracket) and field
maintenance (with a self-aligning, field replaceable
diaphragm), use of Bogen horn-type loudspeakers
saves both time and money.
Speaker and mounting bracket are handsomely fin-
ished in textured mocha enamel. Diameter is 11 " with
a depth of 10-1/2". A beam clamp is also available
(BC1), as an option.
• High intelligibility and efficiency; ideal for both one-way and talk back applications
• Weatherproof, all metal construction
• 30 watts; 25/70 volt or 8-ohm operation
• Rotary tap impedance selector on SPT30A
• Beam clamp available (BC1)
Features
Description
Specifications subject to change without notice.
© 1995 Bogen Communications, Inc.
Part No. 54-7759-04C 0703
Reentrant Horn
Loudspeakers
Models SPT30A
and SP308A

Power Rating (RMS): 30 watts continuous, 40 watts equalized
Frequency Response: 225Hz to 14kHz
Impedance:
SPT30A — 25/70 volts
SP308A — 8 ohms
Sound Pressure Level: 125dB @ four feet on axis with 30 watt
input @ 1000Hz
Dispersion: 100º
Sensitivity as Microphone: -22dBm [Ref: 10 dynes/cm2]
Dimensions: 11" Diameter x 10-1/2"D
Shipping Weight:
SPT30A — 6 lb.
SP308A — 6 lb.
Finish: Textured mocha enamel
Impedance Selector Switch Settings: 25V @ 15, 7.5, 3.7, 1.8 watts
(SPT30A) 70V @ 30, 15, 7.5, 3.7, 1.8 watts
Sound Pressure Level in dB @ 1000Hz: Watts Feet on Axis
Input: 4 8 163264
30 — 125 11911 3107 101
15 — 122 11611 0104 98
7.5 — 11911 3107 10195
3.7 — 11611 0104 98 92
1.8 —113107 10195 89
Technical
Specifications
The loudspeaker shall be a Bogen Model ____ (spec-
ify SPT30A or SP308A), or approved equivalent,
reentrant type horn loudspeaker. The frequency
response shall be 225Hz to 14kHz. Rated power out-
put shall be 30 watts, RMS continuous. Dispersion
shall be 100º. Sound pressure level, measured four
feet on axis with 30 watt input @ 1000Hz, shall be
at least 125dB.
Use for SPT30A. 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 1.8, 3.7, 7.5, 15, or 30 watts, and
at 25V to 1.8, 3.7, 7.5, or 15 watts.
Use for SP308A. 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 11" in diameter by 10-1/2"D. Shipping weight
shall be 6 lb.
Architect
and Engineer
Specifications
50 Spring Street, Ramsey, NJ 07446, U.S.A.
Tel. [phone]; FAX: [phone]; www.bogen.com