Altec Lansing 150B User Manual
150B
SOUND PRODUCTS DIVISION
"BI-ACOUSTIC" HORN SYSTEM
DESCRIPTION
The ALTEC 150B "Bi-Acoustic" Horn System is
a versatile, two-way speaker system housed in
a weatherproof, compact frame. It provides
excellent reproduction of speech and music for
public address applications, indoors or out
doors. The 150B uses a highly efficient trans
ducer with two sound paths emanating from
both sides of the diaphragm. Lower frequencies
are directed through a long reflex air column
while frequencies above 1000 Hz are directed
through a straight sectoral horn. The sectoral
® Registered trademark of Dow Corning Corp.
horn can be positioned in either a horizontal or
vertical plane. The housing is heavy, doublereinforced Fiberglas® which eliminates struc
tural resonance. A 6-foot, heavy-duty lead passes
through a rainproof cable strain relief at the rear
of the horn to provide input connections. Use
of an ALTEC matching transformer (mounted in
the ALTEC 21256 Weatherproof Transformer
Housing) adapts the horn system for 70V line
operation. A mounting bale is supplied with
each unit to ease installation.
SPECIFICATIONS
Power Rating:
Frequency Response:
Impedance:
Pressure Sensitivity:
Equivalent EIA Rating:
Distribution Pattern:
Crossover Frequency:
50 watts pink noise
150 Hz to 12 kHz
8 ohms
103 dB SPL measured at 4'
on axis with 1 watt input
of pink noise from
500-3000 Hz (Ref.:
0.0002 dyne/cm^)
120 dB SPL measured at 4'
on axis with 50 watts input
of pink noise from
500-3000 Hz
56 dB SPL measured at 30'
on axis with 1 mW input
Adjustable, 120°
horizontal X 90° vertical or
90° horizontal x 120°
vertical
1000 Hz
Mounting:
Finish:
Dimensions:
Mounting Bale
Dimensions:
Weight:
Accessories (must be
ordered separately):
Mounting bale supplied
High-impact resistant
Fiberglas
12Va" (32.07 cm) H x
19" (48.26 cm) Wx
20" (50.80 cm) D without
mounting bale,
21" (53.34 cm) D with
mounting bale
2" (5.08 cm) H x
13Vs" (34.61 cm) Wx
11 Vs" (28.26 cm) D
15 pounds, 10 ounces
(7.09 kg)
ALTEC 70V Matching
Transformers
21256 Transformer
Housing
ARCHITECT'S AND ENGINEER'S SPECIFICATIONS
The loudspeaker horn system shall be of the two-way coaxial type. The low-frequency horn shall be folded and
be not less than 58 inches in total length. The high-frequency horn shall be a straight sectoral horn and shall be
at least 3.7 inches in length. The loudspeaker horn system shall meet the following performance criteria.
Power rating, 50 watts pink noise. Frequency response, 150 Hz to 12 kHz. Impedance, 8 ohms. Pressure
sensitivity; 103 dB SPL measured at 4'on axis with 1 watt input of pink noise from 500-3000 Hz (Ref.: 0.0002
dyne/cm^). Distribution pattern, 90° x120° with distribution controlled by the position of the high-frequency
horn. The housing shall be dustproof, moistureproof and weatherproof. Dimensions shall be 12Va"H x 19"W x
21"D (including mounting bale). Weight shall be 15 pounds, 10 ounces.
The loudspeaker horn system shall be the ALTEC Model 150B.
1515 SOUTH MANCHESTER AVENUE, ANAHEIM, CALIFORNIA 92803
LITHO IN U.S.A. CP-674-5K
AL-1705-3
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