4156-8A
High Performance
15” Low Frequency Speaker
FEATURES - THE ALTEC LANSING DIFFERENCE
• High Performance 250W AES / 1,000W Peak Power Handling
• Designed For Direct Radiator Vented Cabinets
• Linear Low Frequency Reproduction
• High Efficiency
GENERAL PRODUCT DESCRIPTION
The 4156-8A is the latest in a 60 year Altec Lansing tradition of
quality loudspeaker components. High power, high efficiency
and linear response make this 15” (381 mm) transducer a very
capable low frequency component for conventional cluster
designs or subwoofers.
Possibly the most celebrated legacy of Altec Lansing is
dependability. The 4156-8A loudspeaker is constructed from a
reinforced corrosion-resistant die-cast frame, a rugged ferrite
magnet structure, and a weather-resistant cone.
The 4156-8A loudspeaker is designed for direct radiator vented
enclosures. An internal enclosure volume of just under 4 cubic
feet (113 liters) is all that is required for the 4156-8A loudspeaker
to provide 3 dB down frequency response to 50 Hz. Installation
of this low frequency loudspeaker is made simple with 0.25 inch
(6 mm) blade type wire terminals on a two position barrier strip,
allowing bare wire leads, solder connections or crimp type quick-
connect wire terminals.
The Altec Lansing model 4156-8A is an excellent component for
custom subwoofers and a perfect complement to our high
frequency compression drivers when the requirements are high
power capability, linear low frequency response, high acoustic
output level, and absolute reliability.
1000 W. Wilshire Blvd., Suite 362 • Oklahoma City, Oklahoma 73116 • Phone: 1-405-848-3108 • Fax: 1-405-848-3217 • www.altecpro.com
FREQUENCY RESPONSE
1, 2
27 Hz - 3.4 kHz
SENSITIVITY
3
99 dB SPL
POWER HANDLING
4
250 W continuous; 1,000 W peak
MAXIMUM OUTPUT (1 m)
5
123 dB SPL continuous; 129 dB SPL peak
IMPEDANCE
7
Nominal: 8.0 Ohms
Minimum: 6.5 Ohms at 160 Hz
HARMONIC DISTORTION
8
1% rated power 10% rated power
2nd Harmonic 0.57% 2nd Harmonic 2.25%
3rd Harmonic 0.54% 3rd Harmonic 0.94%
THD 0.91% THD 2.49%
INPUT CONNECTIONS
1 x 2 position barrier strip with 0.250 in. blades
DIMENSIONS
Outside Diameter: 15.875 in. (403 mm)
Bolt Circle Diameter: 15.063 in. (383 mm)
Cut-out Diameter
Front Mount: 14.375 in. (365 mm)
Rear Mount: 14.000 in. (356 mm)
Depth: 6.625 in. (168 mm)
WEIGHT
Net: 21 lbs. (9.5 kg)
Shipping: 26 lbs. (11.8 kg)
THEILE-SMALL PARAMETERS:
R
e
5.6 Ohms
f
s
29.0 Hz
Q
ts
0.280
Q
ms
2.91
Q
es
0.310
V
as
353.7 liters (12.49 ft.
3
)
S
d
850.0 cm
2
(131.75 in.
2
)
X
max
4.3 mm (0.17 in.)
V
d
365.5 cm
3
(22.30 in.
3
)
L
e
1.05 mH
η
0
2.72%
B
l 17.1 Tm
M
ms
87.3 g
C
ms
350 µm/N
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