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A simple turn from one dot to the next creates a difference. Remember that a little can go a long
way.
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The first knob is often associated with “Solid”, especially in the 50Hz area. At lower volumes,
you may wish an increase to fill out the bottom end – similar to the “loudness” control on your
stereo –while at louder settings, consider a cut here. This is also a good knob to help out less
than full range cabinet designs, adding back the “-3 dB” often seen in specifications. Since “-3
dB” is halve the power of “0 dB”, a cabinet designed for the full range of the instrument will
always sound better.
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The second knob has been found to be useful for filling in the dead spot so common on many
necks –the one about ½ way up on the “G” string. The top three bands control frequencies
where your sound starts to get defined as human hearing starts to sharpen. The right amount
of midrange gives you clarity and punch, but be careful: too much can sound harsh.
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Finger noise may be found between 500 and 1000 Hz, and the third knob can be used to sub
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tract unwanted noise and optimize the finger effect. Those using a slap or pop style will find
this useful to eliminating harshness by adjusting upper midrange frequencies. This is also a
useful range to adjust the “honk” prevalent in some speaker cabinets.
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The fourth knob can help add a top end “snap” that dull-sounding speaker systems or pickups
lack, as well as compensate for an old set of strings.
Open Strings: “B” @ 31 Hz, “E” @ 41 Hz, “A” @ 55 Hz, “D” @ 73 Hz, “G” @ 98 Hz, “C” @ 132 Hz.