Hello all. I am using WinISD to model different combos of mixed speakers and found you CAN get phase plots of mixed speakers to overlay if tuned properly, but not usually. My question is, how much phase offset between drivers is tolerable before it's audible? Particularly in that 40-150Hz region where phase is swinging a lot. 10 degrees? 45 degrees? Anyone done experiments with known speaker boxes or found a thesis on it? I assume the answer is at least as high as the speaker to speaker variability of a multidriver cabinet. Anyone know what that is?