It still sounds as if your bass is out of phase with the rest of the FR when wired up correctly. What I mean is that the bass driver in each speaker is wired out of phase with the rest of the drivers in the speaker. I'm not familar with this speaker at all, but do I assume correctly that it has provision for biwiring? Have you tried biwiring it? If it does provide biwiring, try setting up the speakers biwired normally (phase not inverted, + to + and - to - in both channels) then reverse phase in the bass channel in one speaker then in both speakers and see what ddifferences occur.
BTW, I don't think this problem is in your components. The phase issues in components is related to absolute phase issues and will not change frequency response in any meaningful way. Quality of presentation perhaps with some recordings but often you will note no differences between inverted and non-inverted absoloute polarity (phase).
And yes it could well be a wiring problem in a crossover but I wouldn't guess that from what you are saying because it would have to be in the crossovers in both speakers, which I think would be highly unlikely. Perhaps there is a wiring problem in the manner the crossover is wired to the connectors.
You might also find using a Radio Shack sound pressure level meter and a test disk with 1/3d octave tones would be helpful in measuring the output in each driver in each speaker, each speaker itself, and then comparing the results from the two speakers wired from your amp in all the possible permutations.
Hope that helps a bit.
BTW, I don't think this problem is in your components. The phase issues in components is related to absolute phase issues and will not change frequency response in any meaningful way. Quality of presentation perhaps with some recordings but often you will note no differences between inverted and non-inverted absoloute polarity (phase).
And yes it could well be a wiring problem in a crossover but I wouldn't guess that from what you are saying because it would have to be in the crossovers in both speakers, which I think would be highly unlikely. Perhaps there is a wiring problem in the manner the crossover is wired to the connectors.
You might also find using a Radio Shack sound pressure level meter and a test disk with 1/3d octave tones would be helpful in measuring the output in each driver in each speaker, each speaker itself, and then comparing the results from the two speakers wired from your amp in all the possible permutations.
Hope that helps a bit.