The Foundation does not play 5.1 through the HDMI cable. The president of Krell, Bill McKiegan, told me that in December 2013 there would be a firmware upgrade to play 5.1 but it never happened. Love the processor but regret buying it. Other units for a fraction of the price or twice the price have 5.1 analog inputs. Can't understand how Krell thought it was a good idea to leave them off a $6500 piece of equipment.
