KRK 10S - Manual (Page 19)

The sound quality changes...
The monitor (or subwoofer) hisses, hums or makes other loud noises...
• Repeat the steps in the Troubleshooting section above before continuing to the next
steps.
• Disconnect the signal cable at the unit’s input. 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 whatsoever, it could be that one or more of the drivers (woofer,
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 unit. The service department can be reached at 954-316-1580.
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 unit.
• Check the connections between the signal source and the unit. The sub and monitor’s
XLR and TRS connectors are 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 Your System section on page 6 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 such as dimmers, neon signs, TV screens, and
computer monitors. These devices should not be using the same circuit.
Please read the warranty card that was included in the shipping carton of your subwoofer
prior to sending it back to KRK Systems, LLC. All products in need of repair can be returned
to the dealer where they were purchased or to KRK Systems, LLC.
Before shipping your unit back to KRK for service you must acquire a Return Material
Authorizaion (RMA) from KRK. Your unit will not be received by the company, nor will any
work be done on your unit without this number. Please call KRK at 954-316-1580 to request
your RMA.
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