Mac OS X 10.4 Help

System Prefs Icon

My iSub isn't working

If your iSub subwoofer isn't working, make sure it's plugged into a USB port on your computer and into a working power outlet. If you still can't hear any sound through your iSub, you should check your system sound settings.

Note: If you are using an Intel-based computer, an iSub will only work when USB speakers or a USB audio interface device are connected to the computer and selected as the default output device in Sound preferences.

To check your system sound settings:

  1. Choose Apple menu > System Preferences, click Sound.
  2. Click Output, and then make sure:

    3. The “iSub volume” slider is not all the way to the left.

    The iSub Mute checkbox is not selected.

    The “Output volume” slider is not all the way to the left.

    The Mute checkbox is not selected.

See also

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