Q: Why is my Apollo clicking when I change certain settings?
A: There are a number of different actions that will cause the internal relays in your Apollo to “click”. While this sound can be alarming at first, this is completely normal behavior and it does not indicate that there are any issues with your Apollo. We have a comprehensive list below of the actions that will cause your Apollo’s relays to click during normal use.
Note: Not all features listed are available on all models, and not all actions listed cause relay clicks on all models.
Actions That Can Cause Relay Clicks on Apollo Interfaces
Powering up
Changing Input Type (Mic, Line, Hi-Z)
Engaging/Disengaging the Pad
Stereo Linking Channels (only if the input type or pad setting is changed when the channels are linked)
Changing Monitor Level in Console Settings
Changing Output Reference Levels in Console Settings
Enabling or Disabling Line Input Gain in Console Settings
Enabling or Disabling Monitor Output Gain Bypass in Console Settings
Changing Clock Source
Changing Sample Rate
Changing Line Input Reference Level