Summary: The quality of the sound is great! I am definitely not using all the features. I have it driving a Bose Acoustimass 6 speaker system, and I am very happy with the sound. As all the HK systems look similar, I was confused regarding which features the 145 actually had, and thought it had HDMI interface. It does not, but my Toshiba HDTV has 3 HDMI inputs, so I don't need any more anyway.