In terms of room size/speaker positions, I’ve played around with my 3.7s for quite some time and have settled on the following in my 15x20 room:
Speakers are placed along the long wall 32” out in front (measured from the rear of the speaker), 8.5’ between (from tweeter to tweeter) and approximately 5.75’ from each side wall. My listening position is 9’ away with a little over 2’ of space behind me. I have found this to be the optimal positioning for my room.
In terms of R2R Dacs, I recently updated to an MSB Analog DAC. Significant improvement from my Ayre QB-9.
Speakers are placed along the long wall 32” out in front (measured from the rear of the speaker), 8.5’ between (from tweeter to tweeter) and approximately 5.75’ from each side wall. My listening position is 9’ away with a little over 2’ of space behind me. I have found this to be the optimal positioning for my room.
In terms of R2R Dacs, I recently updated to an MSB Analog DAC. Significant improvement from my Ayre QB-9.