According to Pricegrabber:
"The RX-4600 makes the most of all digital sources, giving you new possibilities for audio and video entertainment. The RX-4600 is a reciever that will increase home theater enjoyment with more vivid images and richly detailed sounds, plus greater versatility and convenience.
With CD-quality digital HD Radio, digital data links and advanced digital processing circuitry, it takes full advantage of the its audio and video source. It also has a front panel design whose elegance matches its capabilities. For movie and music, mulit-channel surround and stereo, the RX-4600 will ensure that your entertainment is totally enjoyable."
