We welcome your input. If you should have any problems with your KRK monitors, we want to hear about it. You can either email us (please provide your phone number with your email) or contact our technical support department directly at (954) 316.1580. We're constantly striving to better our already high quality. Your comments are appreciated.

Troubleshooting Hints

Troubleshooting Answers

Problem: If there is no power, check to see if...

The power cord is plugged into both the IEC socket on the rear panel of the unit and into the AC mains
The AC mains voltage is matched to the operating voltage requirements. If the AC mains voltage is higher than the selected voltage it is possible that the fuse needs to be replaced.
The power light is illuminated on the front panel of the monitor (V Series only). If not, turn the power switch OFF and check the A/C mains fuse(s). NEVER USE A LARGER AMPERAGE FUSE THAN IS SPECIFIED! Turn the power switch back on. The power light should illuminate. Please see the user guide that came with your monitor.
If a fuse change was needed and upon powering the monitor back up the fuse(s) blow again, the monitor needs to be returned to the dealer where you purchased it, or to KRK for servicing.

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Problem: If you can't hear any sound...
Repeat steps in the previous troubleshooting section above before continuing to the next steps.
Check to see if all other audio devices using the same AC outlet are still operating.
Make sure that:
The audio source cable is plugged into both the source output and the monitor input.
The System Gain pot is turned up fully clockwise (+ 6 dB).
The signal source (E.g. mixing console, work station, CD player, etc.) is turned up to a level that can properly send a signal to the monitors.
If one of the monitors is working. Exchange the audio input cable from the non-working monitor to the working unit. This will determine whether it's really the monitor, a faulty cable, or some other glitch in the audio chain.
If the monitor is still not responding, it should be returned to the dealer where you purchased it, or to KRK for servicing.

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Problem: If the monitor suddenly stops working...
Turn the monitor send down or off.
Repeat steps in the troubleshooting sections above before continuing to the next steps.
Carefully check to see if the amplifier's back plate is hot! If the monitor has been running at highest power output for an extended period of time, it could be that the unit has become overheated and the protection circuitry has shut the system down momentarily. The monitor provides maximum circuitry protection against AC power surges, amplifier overdrive, and overheating of the amplifiers. Turn the monitor off then wait 30 minutes to allow the back plate to cool down. Turn the power switch back on.
Increase the volume to check for normal operation.
If the monitor is still not responding, it should be returned to the dealer where you purchased it, or to KRK for servicing.

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Problem: The sound quality changes...
Repeat steps in the previous troubleshooting section above before continuing to the next steps.
Disconnect the signal cable at the input of the monitor. With power on, place your ear close to each driver (tweeter/woofer) and listen for noise (i.e., a slight hiss or hum). If there's absolutely no sound whatever, it could be that one or more of the drivers (woofer or tweeter or both) is at fault. It's also possible that the problem lies somewhere in the electronics.
Play some non-distorted source material at a low volume. Carefully cover the tweeter (to block the sound) without touching the diaphragm. Is the woofer producing a clean sound? If there is not a clear tonal quality or any sound at all then the woofer probably needs to be replaced.
Cover the woofer so you can hear mostly the tweeter. Is the tweeter producing a clear sound? If there is not a clear tonal quality or any sound at all then the tweeter probably needs to be replaced.
Once you have a better idea of what may be at fault then call us and speak with someone in the service department. They will help you determine the best solution to correct your monitors. The service department can be reached at (954) 316.1580.

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Problem: The monitor hisses, hums or makes other loud noises...
Here are some suggestions that will help you eliminate these undesirables from your system:

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. The monitors Neutrik(r) Combo connector is a completely balanced system. If you're connecting an unbalanced output to the monitor, be sure that you're using PIN 2 for signal and have PIN 1 and PIN 3 tied together at the source end.
Refer to the Connecting the System section on page 4 of this manual to ensure that the AC mains is matched to the operating voltage requirements.
All audio equipment should use the same ground point. Check all other devices using the same AC output in the building like dimmers, neon signs, TV screens, and computer monitors. These devices should not be using the same circuit.

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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:

Please call for a Return Authorization number before returning any product for repair.

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 product, 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 established and approved.
Replacement carton and packaging can be purchased from KRK Systems, LLC. $18.00 per carton.
For replacement part quotes call 954-316-1580.

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