Originally Posted by
ckirocz28
Ok, after some modeling, I've learned that the xovers only add group delay (same group delay for LP and HP) and the processing time is under 1ms in most cases, so totally ignore the above mentioned math.
After some more experimenting, I've discovered the cause, my subwoofer amps have a phase adjustment control that seems to be a straight delay circuit, set at 180 degrees there is 10ms less delay than having it set at 0 degrees. So I am totally blaming the subwoofer amps for the additional delay. Maybe someone else with an amp with a phase control can test their amp and see if this is the case for all of this type phase control.
I hope this little investigation will help someone else.