When you connect an optical cable, the D1 will sense that an optical input is present and give that input priority. If using D1 with optical outputs from your TV, DVD player, Apple TV, etc you will need an AC USB power adapter (sold separately) to power D1. When using the optical output from your computer, you may power D1 via the computer's USB power and therefore no external power supply is needed.
How do I use the optical input of the D1?
