2
Parametric EQ Explained
A
Parametric EQ
(PEQ) is a little harder to user than a
Graphical EQ
(GEQ), but it is a
much more powerful tone-shaping tool. Unlike a GEQ, a PEQ gives you full control over all
three EQ parameters :
Gain
,
Frequency
, and
Q
(bandwidth).
Gain knob
allows you to
boost
or
cut
your signal at a specific frequency.
Frequency knob
allows you to adjust the frequency at which the boost / cut occurs.
Q knob
allows you to control the amount of frequency range affected by the boost / cut.
Low Q settings allow wide frequency range to be affected, while high Q settings focus the
boost / cut to a specific frequency.
Important frequencies for guitar
:
•
Lows : 100 Hz - 300 Hz
•
Low Mids : 400 Hz - 600 Hz
•
Mids : 700 Hz - 1KHz
•
High Mids : 1 KHz - 2 KHz.
•
Presence : 5 KHz
Low Q = Wide bandwidth
High Q = Narrow bandwidth
When applying a boost or a cut, you may perceive an increase or a drop in the overall
volume level, adjust
Master knob
to compensate this perceived volume change. Set this
knob at mid-point (12 o’clock) for unity gain.
