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Audio, humming sound when audio input device's content is quiet or not playing anything
Symptoms
Humming sound coming from cabinet when audio content is quiet or not playing anything.
Issue is present when using digital signal.
When XLR cable from mixer output is removed, humming stops.
Environment
Sportsound 500HD, 1500HD, 2000HD, 1000
External audio input device (iPod, Laptop, Phone)
Cause
A noisy audio input device has its volume set to 100%.
Alternative - With all channel faders down or channels muted, Mixer output has hum on it.
Resolution
Turn audio input device's volume down to reduce background noise. Optimal output level is between 60% - 80%.
Ensure that any unused mixer channels have their faders turned down.
Alternative - replace mixer if issue is not with input devices.
Work around
If mixer Left output is found bad, swap connection to mixer Right output until mixer can be replaced.
KB ID: DD2913045
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