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DRM Professional Passive Loudspeaker Series
Appendix A: Service Information
Poor bass performance
• Check the polarity of the connections between
the amplifier and the loudspeakers. You may have
your positive and negative connections reversed
at one end of one cable.
Bad sound
• Is it loud and distorted? Make sure that you’re not
overdriving a stage in the signal chain. Verify that
all level controls are set properly.
• Is the input connector plugged completely into
the jack? Be sure all connections are secure.
• If possible, listen to the signal source with
headphones plugged into the preamp stage.
If it sounds bad there, it’s not the loudspeaker.
• Too much bass or not enough bass? Move around
the room and see if the bass response changes.
It’s possible your listening position coincides with
a room mode where the low frequencies either
become exaggerated or nulled. If so, try moving
the loudspeakers to a different position, or moving
your listening position.
Other Issues
• Please email or call Technical Support if you
are having any other issue not listed here:
o mackie.com/support-contact
o 1-800-898-3211
Repair
For warranty service, refer to the warranty information
on page 20.
Non-warranty service is available at a factory-authorized
service center. To locate the nearest service center, visit
www.mackie.com/support/service-locator. Service
for DRM passive loudspeakers living outside the United
States may be obtained through local dealers or distributors.
If you do not have access to our website, please call
our Tech Support department at 1-800-898-3211 (normal
business hours, Pacific Time), to explain the problem.
They will tell you where the nearest factory-authorized
service center is located in your area.
If you think your DRM loudspeaker has a problem,
please check out the following troubleshooting tips
and do your best to confirm the problem. Visit the Support
section of our website (www.mackie.com/support) where
you will find lots of useful information such as FAQs
and other documentation. You may find the answer
to the problem without having to part with your loudspeaker.
Troubleshooting
No sound
• Are the level controls on the mixer or amplifier turned
all the way down? Follow the procedures in “Getting
Started” section on page 4 to verify that all of the
volume controls in the system are properly adjusted.
• Is the signal source working? Make sure
the connecting cables are in good repair and securely
connected at both ends. Make sure the output level
control on the mixing console is turned up sufficiently
to drive the inputs of the speaker.
• Make sure the mixer does not have a mute on
or a processor loop engaged. If you find something
like this, make sure the level is turned down before
disengaging the offending switch.
• Are all the connections good and sound?
Make sure all of the connecting cables are in good
repair and securely connected at both ends.
One side is way louder than the other!
• Are the level controls set the same for both channels
on the mixer and amplifier?
• Check the pan control on the signal source. It may
be turned too far to one side. If you’re using a stereo
signal source, it may be delivering an out-of-balance
stereo signal.
• Try switching sides: Turn off the amp, swap
the speaker cables at the amp and turn the amp
back on. If the same side is still louder, the problem
is with your speaker cabling or the loudspeakers.
If the other side is louder now, the problem is with
the mixer, the loudspeaker processor, the amp,
or the line-level cabling.