Altec Lansing 1233 User Manual

1233 WIDE-RANGE

SOUND PRODUCTS DIVISION

MUSICAL SOUND

LOUDSPEAKER SYSTEM

DESCRIPTION

Altec's highly portable 1233 speaker system con
tains a combination of high-quality, high-power
components within an enclosure of modest di

mensions. Designed to meet the demanding
performance standards of professional musi
cians, the 1233 handles up to 120 watts of
continuous, undistorted power, includes

mountings for biamplification, and yields an
extremely wide angle of coverage.

Superb performance is the result of recent
developments. A newly-designed high-

frequency driver, constructed with the patented
Tangerine™ radial phase plug, yields signifi

cantly more high end bandwidth with flat

response. Altec's 15-inch musical instrument-

type loudspeaker with refinements in cone

design gives smoother low end response. And

the 1233's crossover network, specially designed

to enhance the performance and reliability of
the system, provides a smooth crossover at
1200 Hz.

Because of its compact size, professional road
ability, efficiency, and high power handling, the
1233 system is often a travelling companion to

large gospel groups and musicians needing the

portability yet reliability night after night in con
certs and nightclubs. Professional in appearance,
the 1233 handsomely displays a black leather

grained vinyl exterior and a removable textured-

polyester cloth grille. Special metal corner
guards and recessed handles improve physical

handling and set-up. The enclosure itself is rug
gedly designed, heavily braced and acoustically

damped to maximize its performance as a high-

level musical sound loudspeaker system.

SPECIFICATIONS
Components:

Power Ratings:

Frequency Response:
Impedance:
Pressure Sensitivity:

421-8 LF 15" Musical

Instrument Loudspeaker
811B High-Frequency
Sectoral Horn
808-8B High Frequency

Driver with Tangerine™
1233 Dividing Network

Long-Term Broad-Band

Maximum Power: Up to 120
watts of band-limited pink

noise

50 Hz to 20 kHz
8 ohms

100.5 dB SPL measured at 4'

on axis with 1 watt input of

pink noise band-limited

from 500 Hz to 3 kHz. Equal

to E.I.A. rating of 53.5 dB
with 1 mW input (Ref.:

0.0002 dyne/cm^)

120 dB SPL measured at 4'

on axis with 100 watts input

(full power rating) of pink

noise from 500 Hz to 3 kHz

(Ref.: 0.0002 dyne/cm^)

Crossover Network:

Input Connections:

Enclosure Type:

Finish:

Dimensions:

Weight:

Accessories (included
with system):

1200 Hz crossover, full­range, dual LC network, 12
dB/octave slope

Two standard phone jacks,
wired in parallel

Bass reflex-type; heavily
braced, acoustically damped,
rigid enclosure of 3/4"
particle board and plywood

Black leather-grained vinyl

with removable textured-

polyester cloth grille, metal
corner guards, recessed
handles

33"

(83.82 cm) Hx

28"

(71.12 cm) Wx
(48.26 cm) D

19"

112 lb. (508 kg)

50', 2-conductor cable with
standard phone plug on
each end

421-8 LF 15" BASS DRIVER

Voice Coil Diameter:
Voice Coil Material:

Magnetic Assembly Weight:
Magnet Material:
Flux Density:
Dimensions:

Weight:

811B SECTORAL HORN

Dimensions: 8Ya" (21.9 cm) H x 18%" (47.6 cm) W x 13У2" (34.3 cm) D
Weight: 9 lb (4.08 kg)

»Contains patented TangerineTt^ radial phase plug, only from Altec.

3"

Copper

17'/2

lb (7.94 kg)

Ceramic
13,000 gauss
15" (38.1 cm) Diameter,

63/8" (76.2 cm) Depth

22 lb (10 kg)

ARCHITECT AND ENGINEER SPECIFICATIONS

The musical sound system shall be a two-way

loudspeaker system with a 15" low-frequency
loudspeaker, a high-frequency compression

driver loaded with a cast aluminum sectoral

horn, and a dividing network having a crossover
frequency of 1200 Hz, mounted in a bass reflex-

type enclosure.
Tbe system shall meet the following structural

and performance criteria. The enclosure shall be
constructed of heavily braced 3/4" wood, shall
be acoustically damped, and shall be finished in
black vinyl with removable grille, metal corner

guards, and recessed handles. Power capacity:

up to 120 watts of continuous pink noise, band­limited from 50 to 20,000 Hz. Frequency
response, 50 to 20,000 Hz. Crossover frequency,

1200 Hz, and crossover slope, 12 dB/octave.

Pressure sensitivity, 100.5 dB SPL measured on
axis with 1 watt input of pink noise band-limited
from 500 Hz to 3,000 Hz. Impedance, 8 ohms.

Dimensions, 33" H x 28" W x 19" D. Net weight,

112 lb.

The loudspeaker system shal
Model 1233.

808-8B COMPRESSION DRIVER*

1.75"
Aluminum
1-1/5 lb (0.54 kg)
Alnico V
15,250 gauss

4У2" (11.4 cm) Diameter,

(9.4 cm) Depth

7 lb (3.2 kg)

be the ALTEC

LITHO IN U.S.A. 877 2.5M

SOUND PRODUCTS DIVISION

1515 SOUTH MANCHESTER AVENUE, ANAHEIM, CALIFORNIA 92803

AL-1208