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Monitor hisses, hums or makes other loud noises.
• Make sure that the power cord is plugged snugly into the IEC socket on the rear of the
monitor.
• Check the connections between the signal source and the monitor. Make sure all
connections are secure and that the cable is not damaged or wired incorrectly.
• If you are using an unbalanced output to balanced cable conversion, make sure it is
correct. The shield is connected to the unbalanced ground of the source and pins 1 and
3 of the XLR (or the sleeve and ring on the ¼” TRS jack).
• All audio equipment should use the same ground point. Check all other devices using the
same AC output in the building like light dimmers, neon signs, TV screens, and
tcomputer monitors. These devices should not be using the same circuit.
• Verify that the signal cables are not routed near AC power lines or other EMI sources
(including wall power adapters and computers).
• Excessive hiss may be a result of an incorrect gain setting before the speaker connection.
Verify the source signal is not noisy before connecting the monitors. This can be tested
by connecting the signal source headphone outputs to a set of headphones.
Please read the warranty card that was included in the shipping carton of your monitor prior
to shipping it back to KRK Systems, LLC. All products in need of repair can be returned to
the dealer where it was purchased, or to the following address:
KRK Systems, LLC.
772 S. Military Trail
Deerfield Beach, FL 33442
Phone: +1 954-949-9600
Fax: +1 954-949-9590
E-mail: returns@krksys.com
Please call for a Return Authorization number before returning any product for repair. The
service department can be reached at 954-949-9600 or email returns@krksys.com along
with the following information:
• Your Name
• Your Address
• Phone Number
• Model Number
• Serial Number
• Description of the problem
For the safest possible return to KRK, please use the shipping carton and packaging that
your monitor was originally shipped in.
KRK cannot be responsible for any damages incurred during the shipping process due to
poor packing. Make sure to insure your shipment.
If your monitor is out of warranty and you would like a quotation prior to servicing your prod-
uct, please include a note with your contact information on it and we will contact you with a
service quote. Service will be performed once your method of payment has been estab-
lished and approved.
For replacement part quotes call 954-949-9600.
