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Feedback/Howling
when using
Microphone
If the suggested solutions do not fix the problem, please contact EAW Applications Engineering (see final page
of manual for contact.)
Rigging Problems
Because of the potential serious consequences and liabilities due to faulty rigging, contact
the
EAW
Service
problems with the rigging hardware integral to the enclosure or EAW rigging accessories.
Enclosure and Integral Hardware
Enclosure problems, such as loose hardware, faulty joints, or other structural problems,
will usually be heard as distinct buzzes, rattles, or other unwanted noises. To test for
enclosure problems, use a sine wave signal manually swept on the loudspeaker. The
input level should be varied, because certain problems can be level as well as frequency
specific. It may be possible to field-repair some enclosure problems.
Cosmetics
While the paint finish and the wood used for the enclosures is of high quality and
durability, scuffs, marks, and other blemishes may appear from normal handling. For paint touchup, use
good quality latex paint. For a more permanent and cosmetically correct appearance, contact the EAW
Service Department for the paint specifications or to purchase small quantities for touch-up. For
cosmetically damaged wood, use common woodworking methods and materials as appropriate for the
damage.
Driver Service
A faulty driver will usually cause readily audible distortions or other unwanted noises. In
other cases, they may stop functioning. Use your ears and test signals or other sound
source to determine which one is at fault. The drivers can be field serviced by replacing the entire driver or
having the driver repaired (such as diaphragm replacement) by a qualified service technician.
1. Access the drivers by removing the front grille.
2. Remove the LF driver of HF horn/driver assembly by unscrewing their retaining screws.
3. Lift the LF driver or HF horn/driver assembly from the baffle.
4. Disconnect the signal cable from the driver.
22
Microphone position with
respect to speaker is
producing a feedback loop.
Department
to
Move/point microphone away from speaker.
Reduce microphone gain.
determine
the
appropriate
service
solution
for
any
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