Altec Lansing 807-8A - Manual

807-8A & 808-8A Ihiver LwdspetJim
807-8A
features:
" Diaphragm
500-20,000 Hz Response
Smooth, Peak-Free Response
Extremely High Efficiency
Low Distortion
Faithful Reproduction
Edge-Wound Voice Coil
Greater Power Capacity
Compact — Easily Installed
Field Replaceable Diaphragm
and Voice Coil Assembly
1 ALTEC
L A N S I N G ®
PROFESSIONAL 'PLAYBACK' SOUND SYSTEMS
BROADCAST & RECORDING STUDIOS - BALL ROOMS
AUDITORIUMS • SCHOOL & CHURCH MUSIC ROOMS
MUSIC HALLS • THEATRES • NIGHT CLUBS
DANCE STUDIOS • WIDE RANGE MUSIC SYSTEMS
The ALTEC 807-8A and 808-8A High-Frequency Driver Loudspeakers are designed for all professional
PLAYBACK applications requiring outstanding reproduction of sound over an extremely wide frequency
range at substantial Fюwer levels. Such conditions are readily fulfilled with unusually high efficiency and
exceptionally uniform response from 500 or 800 Hz (dependent on the dividing network and horn employed}
to over 20,(X)0 Hz.
When used in conjunction with the ALTEC 511A, 51 IB (500 Hz) or 81 IB (800 Hz) sectoral horn, the
N501-8A (500 Hz) or N801-8A (8(Ю Hz) network, and the 414, 515 or 416-8A low-frequency loudspeaker,
the 807-8A and 808-8A furnish the realistic reproduction demanded by all major broadcasting stations, re­
cording studios, theatres, auditoriums and music halls.
Both the 807-8A and 808-8A transducers utilize a voice coil of notably large diameter (1-3/4"), edge wound
with aluminum ribbon and coupled to a large
diaphragm. A mechanical phasing plug (i.e., pole
piece), having two exponential acoustic slots, is utilized to provide the proper phase relationship between the
sound emanating from the center and outer edges of the diaphragm and voice coil assembly, thus ensuring
maximum high-frequency reproduction while maintaining a smooth overall response. Either driver is capable
of uniform, peak-free reproduction to a point far above the range of human hearing. The entire diaphragm
and voice coil assembly of the 807-8A and 808-8A is field replaceable; no special tools are required.
For full range systems utilizing low-frequency loudspeakers of relatively low efficiency, located in non-
reverberant areas having moderate ambient noise levels, the 807-8A driver proves a perfect match. (Such
conditions would be analagous to the average listening room or smaller broadcast and recording studio.)
In instances wherein relatively high ambient noise is present, and where maximum efficiency of both vocal
speech and music must be reproduced with great clarity, the heavier magnet weight and greater flux density
of the 808-8A are preferred. The 808-8A represents one of the finest high-frequency transducers manu­
factured by ALTEC; the 2 dB greater efficiency (over the 807-8A), coupled with the same precision accuracy
of minute production tolerances, make the 808-8A the industry standard for laboratory and professional
usage alike.
These factors, together with the all-important ALTEC criteria of engineering experience, combine to produce
the 807-8A and 808-8A high-frequency loudspeakers of virtually matchless quality and limitless application.
A quality company of LTV Ling Altec. Inc.
1515 S. Manchester Ave., Anaheim, Calif. 92803
New York