Ok. A recording should never out of phase from one range to another. They are all recorded as they arrive at the microphone, and they all generated simultaneously and travel at the same speed. Phase issues are usually at the speaker, often from multiple driver speakers with crossovers. If you are changing phase relationships from lows, mids, and treble it will certainly change the sound. And perhaps you can improve on a particular crossover designer... but that's like redesigning a crossover. It's not for the faint of heart or the inexperienced.
I do appreciate the offer, and if I'm in Austin soon, I'll drop you a note. It's always educational to hear other systems.