The CDC-685 from Yamaha is a stepped-up version of their CDC-585. Like the CDC-585, it's a five-disc changer that you can change the four discs that aren't playing. It's also CD-R and CD-RW capable, CD Text capable and completely programmable. They both feature CD synchro start with compatible Yamaha cassette decks, and peak and index search. The CDC-685 adds a ten-key track and five-key disc access keypad to the front panel--this great feature lets you control the machine without relying on the remote. The most touted advantage that the CDC-685 has is infrared I/O ports, which make this changer ideal for a custom installation.