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INTERNATIONAL FKOJECTIONIST
March 1932
ANPLION OCTOPHASE SPEAKERS
AUDIBILITY INTELLIGIBILITY DURABILITY EFFICIENCY and FREQUENCY RANGE
a^ Choose the
AMPLION OCTOPHASE
It is so much finer, yet costs so little more
AMPLION
OCTOPHASE
GIANT DYNAMIC
AIR COLUMN UNIT
Weight 15 lbs.
Height 5% in.
Diameter 5% in.
Field Coil Resistance 5
ohms. Field Coil Supply 6 volts
D. C. Field Current Consumption
1.2 amperes. Voice Coil impedance 16
ohms. Maximum Capacity 25
watts. Permanent Capacity 6
watts. Shipping Weight 21 lbs. Shipping Dimensions
12x12x12 in. This unit is also supplied with 1500 ohm field coil. Field Supply 110 volts D. C. Field Current Consumption 75 milliamperes.
CONSTRUCTION
In this unit, the area over a scientifically domed diaphragm encased in a scientifically shaped air chamber is divided into eight divisions. The centers of gravity of each of these divisions are exactly equi-distant from the throat of the unit, and since all operate under identical pressures, the sound impulses from each division reach the throat of the horn in perfectly timed synchronism with the arrival of sound impulses from all other divisions. From these eight divisions this reproducer derives its name — OCTOPHASE.
AMPLION NINE-FOOT THEATRE HORN JW-9
The JW-9 Horn is especially designed for theatre and indoor use. No horn of such great clarity and wide frequency range has ever been concentrated into so small a space. It covers the full speech range perfectly preventing over resonance and muffling on base notes. As a reproducer of music, it possesses a brilliancy impossible of attainment in horns made of soft materials. Its nine foot air column and wide bell, assure excellent performance on the low notes.
List Price $95.00
Air Column 108"
Bell 34" X 26"
Bell Area 720 sq. inches
Weight 33 lbs.
Shipping Wgt. 70 lbs.
Shipping Dimensions
38"x33%"x39"
Angle of Spread measured
at lip of bell 36°
Height 42" Width 34"
Depth 37"
It is those overtones from 5,000 to 8,000 cycles which give character to speech. Can you afford to nullify your entire equipment by employing speakers which cannot reproduce these frequencies?
Write for folder describing the OCTOPHASE unit and complete line of AMPLION exponential weatherproof horns
AMPLION PRODUCTS CORP.
38 West 21st St. New York, N. Y.