In my current set up, I have a 2 seat reclining couch set up with a large armrest that separates the two seats. After not being happy with what Audyssey has done with my Denon receiver, I have decided to try and manually calibrate everything with a tape measure and SPL meter. My question is where should I take the speaker distance and speaker level measurements from? I could either take the measurement in the middle of the two seats, or the left seat where I sit the most. I am not sure what would provide the best listening experience since no one would technically ever sit on the armrest and if I used my main seat, it would be biased towards that seat only. Thank you!