i read many of tutorials and articles that the advice myself to start by this distance to 38% to i find the sweetspot.
What I think for a small room, would put the speakers as close as possible to the wall.
For exemple, if I place my speakers about 30cm from the wall, my response would be near cancellation of 290hz.
If my room is 3.5 m in length (greater than width and height) using 38% => 3.5 * 0.38 = 1.33 m
To 1.33 m = ~ 64Hz of valley cancellation
Would not it be better to stick with the cancellation 290hz closeto a hypothetical schroeder freq?