Can I use the D1 with my Airport Express for even better sounding Airplay?

Absolutely! We've had a lot of really good feedback from our customers on this, and it's really easy to add to an existing Airplay setup. You can connect your Airport Express into the D1's optical input using a mini-Toslink to Toslink cable to pass a digital signal to the D1. Like other setups without a computer you'll still need to connect the D1 to a USB connection for power - Either a USB AC adapter like we offer in our accessories, or a nearby USB port capable of delivering a minimum of 500mA. Please note that the USB port on the Airport express is intended only for lower powered or self powered devices (like a printer) and will not reliably power the D1.