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FISHMAN PREFIX™ ONBOARD BLENDER
4
PREAMP FUNCTIONS
BATTERY COMPARTMENT
Pull the small tab at the top
of the ONBOARD
BLENDER™ toward you. The
body of the preamp will
swing out, revealing the BAT-
TERY COMPARTMENT.
Insert a fresh 9V alkaline
battery.
MICROPHONE TRIM CONTROL
A small circular potentiometer is located on the underside of the preamp just
below the battery compartment. This control is used to calibrate the microphone
gain in relation to the pickup. To use this control, set the BLEND slider to the
center position and, with a small screwdriver, adjust the potentiometer until both
the microphone and pickup levels are balanced.
ENDPIN JACK
The ONBOARD BLENDER™ has no ON/OFF switch. It is turned on only when
an instrument cable is plugged into the endpin jack. To conserve the battery,
remove the instrument cable from the endpin jack when the unit is not being
used.
NOTE: Plug an instrument cable into the endpin jack before you plug into the
sound equipment. Doing so will prevent loudspeaker damage.
BATTERY LOW LED
When plugging into the endpin jack, the LOW BATTERY light will flash momen-
tarily, indicating that the power is on. When the LOW BATTERY light stays on, it
is time to change the battery.
CONTROLS
NOTCH FILTER
This is a fixed level, variable-frequency filter for eliminating feedback or
unwanted resonance. The affected frequency is variable from 50 to 900 Hz. The
GUITAR BODY
PREFIX™ SERIES PREAMP
MICROPHONE
TRIM
9V BATTERY