Ashly Parametric Equalizers SC-63 - Manual (Page 10)

8. Set your center frequency control to about an octave below the frequency
number you select.
9. Set the bandwidth control to full sharp (full clockwise).
10. Set the amplitude control of the chosen band to +6 dB.
11. Depress the master equalization in/out switch, and the appropriate band
in/out switch (SC-66A only), to the in position.
12. Very slowly rotate the center frequency control towards the selected
feedback frequency until feedback occurs. If feedback does not occur,
increase system gain and repeat step 11.
13 . Repeat step 12 until you are sure you have the control centered on
exactly the desired frequency.
19. Move the amplitude control from +6 dB to -6 dB.
15 . Increase the gain on your mixer until the next feedback sounds. If the
same feedback frequency occurs again, reset the amplitude control to -9
or more, as needed.
16. Repeat steps 6 thru 15 to notch out new feedback frequencies for maximum
gain before feedback.
NARROW BAND STEP BY STEP SETUP INSTRUCTIONS
1. Set all gain controls on your parametric to 0, and make sure your master
equalization in/out switch(s) are in the out position.
2. Set all equalization controls to flat.
3 . Switch out all other equalization devices.
9. Estimate the problem frequency area (use the chart on page 20 for help).
5 . Select the most appropriate control band (LOW, MID, HI).
6. Set your center frequency control to about an octave below the frequency
number selected.
7 . Set the bandwidth control to .1 or sharper depending on what you are
trying to correct.
8. Set the amplitude control of the chosen band to +6 dB.
9 . Depress the master equalization in/out switch, and the appropriate band
in/out switch (SC-66A only) to the in position.
10. Very slowly rotate the center frequency control towards the estimated
problem area until it is emphasized.
11. Repeat step 10 until you are sure you have the control centered on
exactly the desired frequency.
12. Re-adjust the amplitude control down from +6 to the (-) side until the
desired response is achieved. (Re-adjustment of the bandwidth control
may also be necessary)