Controls - Source Audio ZIO User Manual

Controls

OUTPUT Knob
Think of this knob as a master volume control. Rotate this knob to boost your signal +20 dB or cut
your signal down to -∞ dB (zero volume). In addition to a powerful clean boost, the OUTPUT knob
can also be used to turn the ZIO into an "underdrive" when set to a gain level lower than the bypass
signal. Unity gain, or 0dB, is set to be around the 9:00 point of the OUTPUT knob.
CIRCUIT Selector Knob
The CIRCUIT Selector Knob selects between the four discrete circuits the ZIO offers: JFET, LOW-CUT,
STUDIO and E-PLEX. Each circuit has been carefully crafted to maximize performance and will react
differently in your setup. You may find yourself choosing different circuits for different applications
of the ZIO. For a more detailed description of each circuit, visit the
User Guide.
TONE toggle switch
The TONE toggle switch is a 3-way toggle that mimics short, medium, or long cable runs.
•
BRIGHT simulates a low-impedance short cable run, preserving (and in many cases,
restoring) top end lost by long cables or large amounts of pedals.
•
MED simulates a medium cable run and is the most "transparent" option, meaning it has the
least overall effect on the tone of your signal.
•
DARK simulates a higher-impedance, long cable run with top-end roll off from the
capacitance. Use this mode to simulate a stadium-sized cable run or a coily cable. Some
players would intentionally use cables like this to shave off some of the naturally harsh-
sounding highs from their rigs.
SA271 ZIO User Guide
Preamp Modes section of this
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