Ashly Parametric Equalizers SC-63 - Manual (Page 4)

INTRODUCTION
As soon as reproduced audio appeared on the scene, the need for tone controls
was apparent; a common problem has always been loss of frequency extremes.
Early equalizers were simple bass and treble controls which were used to
extend frequency response a bit. This type of tone control is powerless when
dealing with specialized acoustical problems. Movie people of the thirties
designed equalizers to deal with mid-range frequencies and used them for
specific problems of intelligibility. These "dialogue equalizers" along with
other special effects devices such as sound effects filters are examples of
equalizers designed to solve specific problems.
Graphic Equalizers were the first universal tone controls, providing a piece-
wise approximation of total frequency response. All of these equalizers have
a common limitation, some of the characteristics of equalization are fixed.
For example, the center frequency and sharpness for each band of a graphic are
pre-determined.
This leads to an immediate frustration because these
characteristics are never exactly appropriate. (What do you do when you need
a fader right between two sliders on a graphic?)
In the late sixtys, the first parametric equalizers were developed by George
Massenburg at ITI. Parametrics provide independent and continuous adjustment
of all three possible characteristics: amplitude, center frequency, and
bandwidth. As a result, virtually any desired frequency response may be
obtained with no restrictions imposed by the equalizer itself.
The Ashly Audio SC-63 and SC-66A parametric equalizers are the result of years
of research and development. They are the most flexible and powerful tool yet
developed for modifying audio frequency response. As such, they can solve
audio problems previously considered insurmountable, and can provide tone
control action to exactly suit particular needs. Of course, they also require
a greater understanding of the equalization process than simpler tone
controls,
We ask that you please read this instruction manual thoroughly before
operation so that you may realize all the features and benefits that the SC-53
and SC-66A parametric equalizers have to offer.
UNPACKING
As a part of our system of quality control every Ashly product is carefully
inspected before leaving the factory to ensure flawless appearance. After
unpacking, please inspect for any physical damage. Save the shipping carton
and all packing materials, as they were carefully designed to reduce to a
minimum the possibility of transportation damage should the unit again require
packing and shipping. In the event that damage has occurred, immediately
notify your dealer so that a written claim to cover the damages can be
initiated.
THE RIGHT TO ANY CLAIM AGAINST A PUBLIC CARRIER CAN BE FORFEITED IF THE
CARRIER IS NOT NOTIFIED PROMPTLY AND IF THE SHIPPING CARTON AND PACKING
MATERIALS ARE NOT AVAILABLE FOR INSPECTION BY THE CARRIER. SAVE ALL PACKING
MATERIALS UNTIL THE CLAIM HAS BEEN SETTLED.