Here are Linn's instructions for setting up Space Optimisation:
To achieve the full potential of Space Optimisation you should:
1. Correctly identify the ideal locations for your speakers;
2. Accurately measure your room dimensions, including all room features, and input these into the Space Optimisation user interface;
3. Correctly set the environmental conditions of your room in the Space Optimisation user interface.
If you correctly follow these steps, Space Optimisation should provide an optimisation that will not need any further adjustment. This user guide should therefore be required for reference only.
Step 3 is easy. Just get a decent thermometer/hygrometer for about $20.
Step 2 can be straight forward depending on the room. If the room has features not covered by SO, accommodation must be made.
Step 1 has been a challenge for me. I previously used Wilson Audio's W.A.S.P. method, but have abandoned it as the results left room for improvement. With Akubariks, I'm finding that placing the speakers at a distance from the front wall between the recommendation from Linn of 20 to 30 cm is a good starting point. Mine are at 24 cm. The distance between speakers relative to the distance to the listener could be determined using the 83% rule pointed out elsewhere. This method has gotten my speakers seemingly close to their ideal location. From this point, use virtual tunedem to refine the ideal location. I moved the speakers forward virtually in 5 cm increments, then refining further to one centimeter increments. I finally settled on "speakers are in their ideal locations."
Again, finding the ideal location has been a challenge for me. I finally have some structure to guide me to a seemingly good result. Of course all this is open to improvement.