phases issues

[crazyhub]

Hi all,

Assuming two filters give the same (or very close) fr magnitude ie straight line and global phase (summing all the drivers) on a large fr range.
- the first one gives mainly parallel shifted phases, never crossing themselves at fx, thus no deep reverse nul
- the second one gives the same parallel shifted phases but crossing at fx, thus a nice deep reverse nul

What will be the listening differences between both and why?

Thanks.

 

[augerpro]

Would an example be say an even order all pass (like LR4) versus a an odd order (like Butterworth3)? In that case I would say the difference is in the off axis response, where the LR4 type will be fairly similar to the on axis response, while teh B3 will have peaks (lobing).

 

[crazyhub]

Augerpro:

IYO, if fx is fixed relatively far away from drivers directivity fallings, would both filter allow a similar off-axis response?