Owner's Manual

9
Connecting your Scarlett 18i8
IMPORTANT: Before you connect your Scarlett 18i8 to your
computer, please complete the software installation according to the
instructions at page 5. This will ensure that the hardware uses the
correct drivers, and will prevent unexpected behaviour.
Power
Your Scarlett 18i8 should be powered from an external 12 V DC, 1 A mains adaptor. A suitable adaptor
is supplied with the unit.
IMPORTANT: We very strongly recommend that you only use the supplied mains adaptor. Failure to
use this adaptor is likely to permanently damage the unit and will also invalidate your warranty.
USB
Your Scarlett 18i8 has a single USB 2.0 port (on the rear panel). Once the software installation is
complete, simply connect it to your computer; we recommend you use the USB cable provided. (Note
that Scarlett 18i8 is a USB 2.0 device, and thus the USB connection requires a USB 2.0-compliant
port on your computer. It will not operate correctly with USB 1.0/1.1 ports, however typically a USB
3.0 port will support a USB 2.0 device.)
Mac OS X only:
Your OS should automatically switch the computer’s default audio inputs & outputs to the
Scarlett 18i8. To verify this, go to System Preferences > Sound, and ensure that the input and
output are set to Scarlett 18i8. For more detailed setup options on a Mac, open Applications >
Utilities > Audio MIDI Setup.
Windows only:
Your OS should automatically switch the computer’s default audio inputs and outputs to be the
Scarlett 18i8. To verify this go to: Start > Control Panel > Hardware and Sound > Sound
> Manage Audio Devices and ensure that ‘Default Playback’ and ‘Recording’ are set to
‘Scarlett 18i8’