[jeffreybehr]

"By phase errors do you mean the relative phase differences between the drivers due to physical offset ie. tweeter acoustically closer to listener than the mid/woofer?" No, don't mean the timing errors inherent in different driver spacing.

I understand that frequencies within the slope of a filter implemented 'analogly' are not only down in level but also are delayed in time. It's this latter delay...or phase error...that I'm asking about in a digital filter.