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Lo-Mid Shift x 10 Switch
The Lo-Mid Shift x 10 switch determines the range over which the Lo-Mid frequency
control will cover. In its “out” position, the range is set at 20Hz to 200Hz. In its “in”
position the range is set at 200Hz to 2KHz.
Note: You’ll notice the Low Frequency and
Lo-Mid Frequency controls overlap (meaning they cover the same frequencies). This is
intentional and is one of the powerful features of the equalizer circuit.
Lo-Mid Wide/Narrow (Q) Switch
The Lo-Mid Wide/Narrow switch determines the width of the frequency band that the
Lo-Mid control covers. In its “out” (Wide) position, the Q is approximately 1.1. In its
“in” (Narrow) position, the Q is approximately 3.3. In general, you’ll find that the Wide
setting is most appropriate for boosting a band with the most musical, unobtrusive
results. Conversely, Narrow is preferable for “surgical” cutting of a frequency band
without affecting adjacent frequencies too much.
Hi-Mid Controls
Like the Lo-Mid Frequency control, the Hi-Mid control is a dual concentric pot (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 boost or cut. The Hi-Mid control can
cover two frequency 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: The Lo-Mid and Hi-Mid Frequency
controls overlap in the 200Hz to 2KHz range. This feature allows either or both
controls to be used in this range. This is extremely useful if, for example, you want to
cut at 200Hz and boost at 350Hz.
Hi-Mid Wide/Narrow (Q) Switch
The Hi-Mid Wide/Narrow switch determines the width of the frequency band that the
Lo-Mid control covers. In its “out” (Wide) position, the Q is approximately 1.1. In its
“in” (Narrow) position, the Q is approximately 3.3. In general, you’ll find that the Wide
setting is most appropriate for boosting a band with the most musical, unobtrusive
results. Conversely, Narrow is preferable for “surgical” cutting of a frequency band
without affecting adjacent frequencies too much.
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 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 instruments. 18KHz may be used to add “sizzle” to cymbals and is
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