SA272 ZIO Analog Bass Preamp + D.I. User Guide
TREBLE at maximum (full Treble boost):
GRIT Toggle Switch
The GRIT Toggle Switch is a 2-way ON/OFF toggle switch. Flip to the ON (up) position to introduce a
vintage bass amp transformer-like distortion.
Adjusting GRIT Gain with External Trim Pot
See Output Side Connections to locate the external GRIT Gain control trim pot. With a small Phillips
head screwdriver, you can change the amount of distortion delivered by the GRIT toggle switch when
set ON. In the stock configuration, the GRIT Gain trim pot is set to a medium amount of distortion,
but of course, the amount of drive or grit you will hear will also depending on other factors such as
your bass’s own signal strength, pickup height and output, amp headroom, and other pedals or
effects raising or lowering the signal. Thus, you can tweak the GRIT Gain trim pot for more or less
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