SUBWOOFER SERIES TROUBLESHOOTING
Troubleshooting
Distortion/Knocking
If you believe you hear obvious distortion or knocking sounds, immediately lower the volume level of your receiv- er. Those sounds often indicate that either the receiver or the subwoofer is being over driven and damage can result in playing CD's and DVD's at high volumes.
You should avoid turning the bass or treble to maximum levels, and refrain from using the Loudness button when the volume level is high. This can lead to costly loudspeaker failure. Distorted or unnatural sound can also indicate poor connections. Check the connections. If the sound remains poor or distorted, the subwoofer may have a problem. Please call Dual service number for assistance.
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