Ashly Parametric Equalizers SC-63 - Manual (Page 11)

MEDIUM TO WIDE BAND STEP BY STEP SETUP INSTRUCTIONS
1. First, determine the frequency area of your problem,
2. Decide how wide a spread of frequencies are involved, (see chart on p. 20)
3. Determine whether your problem is an excess or a deficiency of a frequency
range.
4. Set the bandwidth control in accordance with #2 (usually from .5 to 3
octaves).
5. Set the amplitude control to accentuate your problem as determined in #3
either +5 dB or -5 dB,
6. Turn the center frequency control until your problem seems to be at its
worst (re-adjustment of the bandwidth control may be necessary).
7. Reset the amplitude control to correct your problem.
APPLICATION AND OPERATION FOR SOUND REINFORCEMENT
ITEM: Monitor System Feedback Control
Probably one of the most widely used functions of parametric equalizers is in
the control of feedback. The SC-63 and SC-66A's controls make it easy to
locate and notch out feedback frequencies. It is necessary however, to first
be able to understand the relationship between a given pitch and its
corresponding frequency number.
For this reason, the graph on page 20 showing a standard piano keyboard and
music score with the indicated frequencies should be refered to and memorized,
especially if the only test equipment you have are your ears.
The illustration below diagrams a typical monitor system hook-up. After the
addition of an SC-63 or SC-66A to your monitor system, it is possible to get
4 dB to 10 dB of additional gain before feedback. Use the narrow band step by
step setup instructions on page 8 as a guide to get you started. The actual
procedure you use may differ greatly after months of experimenting and use!
MONITOR
SEND
EQ
out in
POWER AMP
out
A TYPICAL MONITOR SYSTEM SIGNAL PATH