There is nothing wrong with phase-shift due to the High-Pass response. This phase-shift never exceeds 90°, which ensures that signals are always in the same quadrant, so combine without negative interference.user 37518 said:Im doing achoustic instrumentation in which the phase between mics is critical, so yes theres something wrong with LF phase shift in some applications.
You are confusing this with distance-related phase-shift, which creates a non minimum-phase system.