Altec Lansing 1234 User Manual
1234 WIDE-RANGE
SOUND PRODUCTS DIVISION
MUSICAL SOUND
LOUDSPEAKER SYSTEM
DESCRIPTION
Designed to meet professional musician stand
ards, the rugged 1234 Wide-Range speaker sys
tem contains components selected for high
efficiency, high power handling and reliable
performance.
The overall performance of the 1234 satisfies the
most demanding requirements of clubs, audi
toriums, ballrooms and most large environments
where only loud, undistorted, and quality sound
will do. High power handling (up to 120 watts)
and low distortion have been achieved with
a new 15" musical instrument speaker yielding
excellent bass and mid-bass, and by designing
the high-frequency-extending Tangerine^'^ radial
phase plug’in the 808-8B driver. A cast-alumi
num sectoral horn is coupled to the compression
•Reg, U.S. Patent No. 4,0.50,541; Foreign patents pending.
driver for maximum dispersion control and the
dividing network provides smooth crossover at
1200 Hz. for protection of the driver and im
proved system power-handling.
Built to be used under physically demanding cir
cumstances, the portable 1234 features a dur
able yet elegant bass reflex enclosure. Steel front
legs, rear casters and a tow bar make handling
an easy task, while vinyl edge bumper guards
protect the cabinet from abuse.
The sturdy wood enclosure is constructed of
3/4" plywood and particle board, contains acous
tical damping materials, and is solidly braced to
effect the optimum in performance character
istics selected for the 1234 system.
SPECIFICATIONS
Speaker
Components:
Power Ratings:
Frequency Response:
Impedance:
Pressure Sensitivity:
421-8LF 15" Low-Frequency
Musical-Instrument
Loudspeaker
511B High-Frequency
Sectoral Horn
808-8B High-Frequency
Driver with Tangerine™
1234 Dividing Network
Long-Term Broad-Band
Maximum Power: Up to
120 watts of band-limited
pink noise (50 Hz to 20 kHz)
50 Hz to 20 kHz
.'8 ohms
100.5 dB SPL measured at 4'
on axis with 1 watt input
of pink noise from 500 Hz to
3 kHz. Equal to E.I.A. rating
of 53.5 dB SPL at 30' with 1
mW input (Ref.: 0.0002
dyne/cm^)
122 dB SPL measured at 4'
on axis from 120 watts
input (full power rating) of
pink noise from 500 Hz to
3kHz (Ref.: 0.0002 dyne/cm'^)
Crossover Frequency:
Input Connections:
Enclosure Type:
Finish:
Maximum
Dimensions:
Actual Weight:
Accessories
(included):
1200 Hz, full range dual LC
network, 12 dB/octave slope
Two standard phone jacks,
wired in parallel
Bass reflex type. Heavily
braced, acoustically damped,
rigid enclosure of ply
wood and particle board.
Black leather-grained vinyl
with removable black
textured-polyester cloth
grille, vinyl-edge
bumper guards. Fitted with
steel front legs, rear casters
and tow bar handle.
45" H X 28" W x 27V2" D
(114.30 cm Hx 71.12 cm W
X 69.85 cm D)
147 lb. (54.34 kg)
50' cable, standard
phone jacks
Voice Coil Diameter:
Voice Coil Material:
Magnetic Assembly Weight:
Magnet Material:
Flux Density:
Dimensions:
Weight:
421-8LF 15" BASS DRIVER
3"
Copper
171/2 lb (7.94 kg)
Ceramic
13,000 gauss
15" (38.1 cm) Diameter,
6ys" (16.2 cm) Depth
22 lb (10 kg)
808-8B COMPRESSION DRIVER*
1.75"
Aluminum
1-1/5 lb (0.54 kg)
Alnico V
15,250 gauss
41/2" (11.4 cm) Diameter,
3’Jf6^' (9.4 cm) Depth
7 lb (3.2 kg)
51 IB SECTORAL HORN
Dimensions: 10%" (27 cm) H x 23%" (59.4 cm) W x I8V2" (48 cm) D
Weight: 17% lb (8.05 kg)
‘Contains patented TangerineTl^ radial phase plug, only from Altec. Reg. U.S. Patent No. 4,050,541; Foreign patents pending.
ARCHITECT AND ENGINEER SPECIFICATIONS
The 1234 Wide-Range Speaker System shall be the
two-way, sound reinforcement type with a sturdy
wood bass reflex enclosure, a 1200 Hz dividing net
work, a 15-inch musical instrument type LF loud
speaker, and a HF compression driver loaded with a
cast aluminum sectoral horn, having exponential
expansion. A 50-foot, 2-conductor cable with stand
ard phone plug at each end shall be included with
the system.
The portable system shall meet the following struc
tural and performance criteria: The enclosure shall
be constructed of heavily braced %" wood, covered
in black leather-grained vinyl and with removable
black polyester cloth grille, vinyl-edge bumper
guards, steel front legs, rear casters and tow bar
handle. Power capacity, 120 watts, measured using
pink noise, band-limited from 50 Hz to 20 kHz. Fre
quency Response: 50 Hz to 20 kHz. Crossover fre
quency, 1200 Hz, full range dual LC network, 12
dB/octave slope. Impedance, 8 ohms. Pressure sen
sitivity: 100 dB SPL at 4 feet from 1 watt, 120 db SPL
at 4 feet from 100 watts (equal to El A rating of 53.5
dB SPL at 30 feet from 1 milliwatt).
Maximum dimensions shall be 45" H x 28" W x
271/2" D and net weight shall be 147 lb, maximum.
The loudspeaker system shall be the ALTEC Model
1234.
LITHO IN U.S.A. 1077-5M
ALTFEIC
SOUND PRODUCTS DIVISION
1515 SOUTH MANCHESTER AVENUE, ANAHEIM, CALIFORNIA 92803
AL-1207
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