Altec Lansing 902-8T User Manual
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LOUDSPEAKERS—PRELIMINARY...
DESCRIPTION
The Altec 902-8A, 902-16A and 902-8T High Frequency
Driver Loudspeakers are designed for professional sound
applications requiring outstanding production of sound
over a wide frequency range at substantial power levels.
Such conditions are fulfilled with high efficiency and uni
form response from 1200 Hz (902-8A, 902-16A) or 500
Hz (902-8T) to 20,000 Hz.
These drivers furnish the realistic sound production
demanded by theatres and music halls, portable concert
sound systems and playback systems when used in con
junction with Altec 51 IB (500 Hz), 81 IB (800 Hz), or
MR931-12 (1200 Hz) horns, appropriate Altec dividing
networks and Altec professional low frequency
loudspeakers.
902-8А/902-16А/902-8Т
COMPRESSION DRIVER
SPECIFICATIONS
Power Capacity:
Frequency Response:
902-8A, 902-16A—
902-8T—
Pressure Sensitivity: 104 dB SPL measured 4' from
Minimum Impedance:
Construction:
Magnet—
Flux Density—
Magnetic
Structure Weight— 5У4 lbs. (2.61 kg)
Diaphragm—
Voice Coil— Edgewound aluminum ribbon
Dimensions:
Weight:
Finish:
Mounting Data:
10 watts continuous pink
noise from 1200 Hz to 20 kHz
(902-8A, 902-16A) or from
500 Hz to 20 kHz (902-8T).
Measurements made on Altec
511 В horn.
1200 Hz to 20 kHz
500 Hz to 20 kHz
mouth of Altec 511В horn
with 1 watt input of pink
noise, band limited from
1200 Hz-5000 Hz
8 ohms (902-8A, 902-8T)
16 ohms (902-16A)
Ferrite, 40 ounces
18,000 gauss
Aluminum tangential
5У2" (13.97 cm) diameter
2Ув" (6.67 cm) deep, less
mounting studs
6 lbs., 6 oz. (2.90 kg)
Gray "Hammertone" enamel
with black rubber boot
Two У4"-24 X 1" studs, 180°
apart on 1У2" centers
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Each 902-type driver uses a voice coil of 1%-inch dia
meter, edge wound with aluminum ribbon and coupled to
an aluminum tangential diaphragm. The entire diaphragm
and voice coil assembly is field replaceable; no special
tools are required. The 902-8A (8 ohms) and the 902-16A
(16 ohms) are designed to operate at a crossover fre
quency of 1200 Hz. The 902-8T (8 ohms) is fitted with a
loading cap to operate at crossover frequencies down to
500 Hz.
Altec's new Tangerine® radial phase plug* refines the
technology of proper phasing, ensuring maximum high
frequency reproduction while maintaining smooth overall
response.
The drivers are capable of uniform, peak-free reproduction
throughout the range of human hearing.
*Reg. U.S. Patent No. 4,050,541; Foreign patents pending.
ARCHITECT'S AND ENGINEER'S SPECIFICATIONS
The compression driver loudspeaker shall meet the fol
lowing criteria. Power capacity; 10 watts continuous
pink noise, band-limited from 1200 Hz to 20 kHz
(902-8A, 902-16A), and from 500 to 20 kHz (902-8T),
measured on Altec 51 IB horn. Frequency response,
uniform from 1200 Hz to 20 kHz (902-8A, 902-16A),
and from 500 Hz to 20 kHz (902-8T). Pressure sensi
tivity; 104 dB SPL measured at 4' from mouth of Altec
51 IB horn with 1 watt input of pink noise, bandlimited from 1200 Hz to 5 kHz. The voice coil shall be
of edgewound aluminum ribbon and shall operate in a
magnetic gap having a flux density of 18,000 gauss
derived from a 40-ounce Ferrite V magnet. The dia
phragm shall be an aluminum tangential. A Tangerine®
phasing plug with 13 radial acoustic slots shall be
utilized to provide the proper phase relationship be
tween the sound emanating from the center and edges of
the diaphragm and voice coil assembly. The entire dia
phragm and voice coil assembly shall be field replace
able without requiring special tools or skills. The driver
shall be
depth of mounting studs), and shall weigh 6 pounds, 6
ounces.
5V2" in diameter by 2%" deep (excluding 1"
ALTTEC:
L-AMSIING
902-8A Driver
The driver shall have a minimum impedance of 8 ohms
and shall operate at a crossover frequency of 1200 Hz
or higher.
The compression driver loudspeaker shall be the Altec
Model 902-8A.
902-16A Driver
The driver shall have a minimum impedance of 16
ohms and shall operate at a crossover frequency of
1200 Hz or higher.
The compression driver loudspeaker shall be the Altec
Model 902-16A.
902-8T Driver
The driver shall have a minimum impedance of 8 ohms
and shall be equipped with a loading cap for operation
at a crossover frequency of 500 Hz or higher.
The compression driver loudspeaker shall be the Altec
Model 902-8T.
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1515 SOUTH MANCHESTER AVENUE, ANAHEIM, CALIFORNIA 92803
LITHO IN U.S.A. 880-5M AL-2402-1
ALTEC CORPORATION
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