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Controls
OUTPUT Knob
Think of this knob as a master volume control. Rotate this knob to boost your signal +16 dB or cut
your signal by about -6dB. In addition to a powerful clean boost, the OUTPUT knob can also be used
to turn the ZIO Bass into an "underdrive" when set to a gain level lower than the bypass signal.
BASS Knob
The BASS Knob is a low-end boost and is a shelving filter centered at 100Hz. The BASS knob starts as
flat (no boost or cut to any frequencies) at fully counterclockwise. That means this control can only
boost your bass frequencies, it is not capable of cutting or lowering any low end. The BASS knob,
when rotated fully clockwise, boosts bass by +11dB.
Below are spectrum analysis figures showing all control knobs at Noon, followed by the BASS knob at
9 o'clock, followed by the BASS knob at 3 o'clock.
SA272
ZIO Analog Bass Preamp + D.I. User Guide
6
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