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