All calculations and the idea come from HiFi Audio Design.
I made 2 versions of this Diffusor: one from 688 Hz to 8600 Hz (Bass) and one from 1147 Hz to 20 kHz (Allrounder).
I know 688 Hz isn't bass but to effectivly diffuse sound with 120 Hz the pillars would have to be nearly 1.5 meters long, this is why i settled for 25 cm which is 688 Hz.
Please make sure to orient all the same way or else the diffusion pattern is off and won't work as effective!
The author marked this model as their own original creation.