I am going into my 3rd week of ownership with my 709, So far everything is good. On Saturday, I have left the puppy on for almost 14 Hours non stop, of course the volume level was in the mid 50s and didn't feel any heat issue.
All features and all output are working well, except that I am not able to make the unit play in "96Khz/24 bit" format. I don't have a Blu ray player, so I have not tested the DTS-HD part. I have only tried it with my OPPO dvd and PC via Xonar DS.
With Oppo I played a Denon reference CD that has classic pieces recorded in "96khz/24bit", If I use the HDMI I get only 48 Khz, If I used the Multichannel, Onkyo doesn't even show the frequency.
With Xonar DS audio card I have the option of using digital (which does a on the fly DTS convertion) that again shows only 48khz. But atleast with Xonar if I select the PCM option, Onkyo does picks up 96Khz stream, but still '96/24' format indicator on the front panel of the Onkyo doesn't lite up.
Another thing with Xonar / Onkyo handshake is that '96 Khz' is the maximum that onkyo recognizes, If I choose 192Khz nothing comes out.
Is there any known limitations or some advanced hidden menu that I need to unlock?