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Hi-Mid Frequency Control
The Hi-Mid control is a dual concentric pot (meaning there are
two controls - one outer and one inner). The outer control is
used to select a frequency while the inner control is used to
apply +/-12dB of gain. The Hi-Mid control can cover two fre-
quency ranges depending on the position of the Shift x 10
switch. These ranges are 200Hz to 2KHz and 2KHz to 20KHz.
Hi-Mid Shift x 10 Switch
The Hi-Mid Shift x 10 switch determines the range over which
the Hi-Mid Frequency control will cover. In its "out" position the
range is set at 200Hz to 2KHz. In its "in" position the range is
set at 2KHz to 20KHz.
Note: You'll notice the Lo-Mid and Hi-Mid Frequency controls
overlap (meaning they cover the same frequencies) in the
200Hz to 2KHz range. This is intentional and is another of the
powerful features of the Tube EQ. This feature allows either or
both controls to be used in this range. This is extremely useful if
you want to cut at 200Hz and boost at 350Hz.
High Frequency Control
The High Frequency control adjusts a shelving filter with a
selectable corner frequency of either 6KHz or 18KHz. The high
shelving filter designed into the Tube EQ affects all frequencies
above the corner frequency when applying boost or cut. In other
words, cutting at 6KHz also cuts 7KHz, 8KHz, etc. The High
Frequency control has as range of +/- 12dB. The two ranges
are selected with the High Shift switch. 6KHz is great for adding
top end to guitars, snare drums and vocals. Cutting 6KHz can
also help to "take the edge off" brittle or harsh sounding instru-
ments. 18KHz may be used to add "sizzle" to cymbals and is
generally referred to as the "air" band. While there aren't very
many instruments that contain 18KHz information directly, many
instruments and mixes contain upper harmonics which can add
extra definition and "space" when boosted. Cutting at 18KHz
can decrease hiss and noise.
High Shift Switch
The High Shift switch selects the corner frequency of the High
Frequency control. In the "out" position the corner is 18KHz. In
the "in" position the corner is 6KHz.
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