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TROUBLESHOOTING
SYMPTOM
FEEDBACK
and / or
POOR
TONE
PICKUP
BUZZES
and / or
RATTLES
THIN
and HARSH
TONE
CAUSE
Bridge is not flat.
Soundpost is too tight.
Pickup wire touching bridge or top.
Mechanical noise from
felted clips or pickup.
Loose shielding cap or nut on jack.
Mechanical noise from straight plug.
Mechanical noise from
the instrument.
Impedance mismatch
Bass amp with pre-voiced
electric bass EQ
O w n e r
O w n e r
Check the flatness of the bridge face with
the edge of a steel ruler or a single edge
razor blade. If necessary, use a 120-150
grit sanding block or a flat file to level the
Flatten only the area that will make direct
Check the instrument's soundpost for fit.
An overly tight soundpost can be
responsible for poor amplified tone.
Make sure that the pickup wire is not touch-
ing the bridge or the top of the instrument.
Unwanted sounds are easily transmitted
Check that the felt covered clips
and the pickup are not in contact
Check the shielding cap and nut
Use only a right angle plug into the
Cracks on your instrument may
create buzzes that are reproduced
Listen to the instrument acoustically
Use an impedance matching 10 M
Pre-voiced EQ can be defeated by
plugging directly into the power amp,
7
7
s M a n
u a l
s M a n
u a l
SOLUTION
area of the bridge face.
contact with the elements.
through this wire.
with the strings.
on jack for tightness.
pickup to reduce vibration.
by the pickup.
before blaming the pickup.
buffer-preamp with the pickup
(with a buffering preamp)
via an effects return jack
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