To connect Duet directly to your home audio system, insert 1/4” to RCA adapters in Duet’s OUT-L and OUT-R jacks and use a commonly available RCA to RCA cable to connect to the AUX or CD input of your receiver.
When connecting to a home audio system, set Duet’s output to 0 dBFS (i.e full volume) and use the receiver’s volume control to set playback level.
Once audio connections have been made, connect Duet’s USB port to your Mac using the provided USB 2 cable. Once connected, the dialog box shown below will appear. Click Yes to choose Duet for Mac sound output and input.
This selection may also be made in the System Preferences > Sound > Output panel.
In iTunes, select Computer as the sound output. Any audio that is played back in iTunes will now be routed to Duet and the output will be available on your home audio system.