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