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.
P
R O F E S S I O N A l
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
µ
m/N