Mackie CRDV Owner's Manual page 12

• Make sure the signal cable is not routed near AC
cables, power transformers, or other EMI sources
(including wall warts and line lumps!). These sources
usually produce hum.
• Is there a light dimmer or other triac-based device
on the same AC circuit as the subwoofer? Dimmers
cause buzzing noises. Use an AC line filter or plug
the monitor into a different AC circuit.
• Excessive hiss is an indication of an incorrect gain
setting somewhere before the speaker.
• If possible, listen to the signal source with
headphones plugged in. If it sounds noisy there,
it's not the subwoofer.
• Try disconnecting the cable connected to the input
jack. If the noise disappears, it could be a "ground
loop," rather than a problem with the CR8S-XBT
subwoofer. Try some of the following troubleshooting
ideas:
• Use balanced connections throughout your
system for the best noise rejection.
• Whenever possible, plug all the audio
equipment's line cords into outlets which share
a common ground. The distance between
the outlets and the common ground should
be as short as possible.
12
CR8S-XBT and CRDV
Bluetooth or Other Issues
• Please email or call Technical Support if you are
having Bluetooth or 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 16.
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 CR8S-XBT subwoofers 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.