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Idiomas disponibles
Idiomas disponibles
BASS CONTROL
The Bass control is a shelving-type tone control that cuts or boosts the lower or bass frequencies
from mid-position. Starting at mid-position, turning the control counter-clockwise cuts the bass
response and turning the control clockwise boosts the bass response. Shelving point for this con-
trol is 80Hz.
VARIABLE GRAPHIC EQUALIZER
LEVEL CONTROL (SLIDER)
The Level control slider cuts or boosts the signal at the frequency set by the Frequency control
knob located directly beneath it. It is used in the same manner as a Graphic Equalizer. Starting at
mid-position, moving the slider up or towards "+15" boosts the signal at the selected frequency,
while moving the slider down from mid-position or towards "–15" cuts the signal at the selected
frequency.
FREQUENCY CONTROL
The Frequency control selects the center frequency that will be cut or boosted by the Level control
directly above it. If The Level control is at "0" or mid-position, moving the Frequency control will
have no affect on the sound. The Frequency control covers a three octave range.
To better understand how the Level and Frequency controls work with each other, try the following example:
1. Set the Gain and Master Volume controls for listening level.
2. Set all tone and level controls at mid-position and turn all frequency controls fully counter-
clockwise.
3. Strike the open "E" string on the bass and move the Level Control on the first band of
the Equalizer to +15 (the Frequency control should be set at 40Hz, which is the fundamental
that the open "E" string produces). The change in sound and pressure levels is a result of
the fundamental "E" note being increased by approximately 15db.
4. Keeping all controls in their present positions (Level control at +15 and Frequency control
at 40Hz), strike your open "E" string again and move the Frequency control from 40Hz to
160Hz. As the Frequency Control is moved from 40Hz to 160Hz you should hear two
increases in volume. The first will be at 80Hz or your first overtone (second harmonic) and
the second will be at 160Hz or the fourth harmonic of your open "E" string.
From the above example a few things may be apparent. One, there's a lot of information con-
tained in one note on your instrument. Two, if one position of the Frequency control gives a much
louder sound or volume, you may have found the area of greatest efficiency of your speaker cabi-
net. And, three, the tonal variations you can achieve with the Variable Graphic EQ are just about
infinite!
TREBLE/TRANSPARENCY CONTROL
The Treble/Transparency control is a dual concentric knob that offers individual control over the
Treble and Transparency functions.
The Treble control (outer knob) is a shelving-type tone control that cuts or boosts the high fre-
quencies. Starting from mid-position, turning the Treble Control counter-clockwise cuts the high fre-
quencies, while turning the control clockwise boosts them. Shelving point for this control is about
2kHz.
The Transparency Control (inner knob) is a shelving-type tone control that cuts or boosts the high
frequencies a full octave above the treble function. Shelving point for this control is about 5kHz.
10 • SM-500
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