First, the Realiser does not connect to the speaker outputs. The Realiser has either HDMI input or analog line level single ended signals.
So, there are different ways to hook it up depending on what you are doing.
To do a PRIR measurement of your system, you would connect the CH. 1 and 2 analog outputs of the Realiser to an analog input of your Denon. This way the Realiser can send the test signal/frequency sweeps out to your speakers to do the measurement.
For listening to music/movies through your Realiser and heaphones, in theory, you hook it up this way:
Source (DVD/BluRay/etc) --> HDMI input on Denon --> HDMI input on Realiser --> HDMI input on monitor/projector, etc.
This way, whatever source you are watching will feed the audio through the Realiser.
However, often having that many devices in the HDMI chain is problematic. Most of the time, by the time HDMI has gone to a 4th device, the signal is compromised and you will get either no signal or static on your monitor.
Since your Denon only has one HMDI output, the only other way to avoid having 4 links in the chain is to use an HDMI splitter so you can split the output from your Denon into two outputs, one to your monitor and one to your Realiser. I know this still means 4 devices in the chain if you count the splitter, but depending on the splitter, it can still work.
I have successfully used a monoprice HDMI 4x2 matrix switcher as a splitter. But it's still not perfect. Sometimes I will have trouble getting the HDMI to get to my monitor properly. I sometimes have to change the power up sequence to get everything to work. Sometimes I have trouble getting my Realiser to request multi-channel PCM from the source in this set up also.
Anyway, I hope this helps more than confuses you more. ;-)
Let me know if you have specific questions. There are a LOT of potential issues with getting everything to work. Your source device is also very critical for getting multi-channel PCM audio into the Realiser via HDMI.
P.S. I just re-read your question and you said connect via analog. Your Denon does note have analog multi-channel pre-amp outputs, so you can't connect the output of your denon to the Realiser via analog.
Edited by darinf - 10/7/12 at 10:43am