ML XT F200 polarity issue in REW?

[b407driver]

My dad recently upgraded his Martin Logan 60XTi to the new XT F200, and I did some quick measurements in REW to see how they looked. Fairly new to REW, still getting familiar with the basics of it (currently learning time-aligning, etc.), but got some results that were... odd. Audyssey MultEQ XT32 reported the left main as out of phase (I have previously seen this from my Polk LSiMs), so took additional measurement with the wires reversed to see what effect it had (we confirmed all other wiring was 'correct'). Anyway, looking at the Impulse window in REW, the left speaker behaves unlike any other speaker/measurement I've since looked at, but I don't know enough to be able to 'read' what the problem is.

Three screenshots follow (I can post the REW file if needed):

1. Left 'correct' wiring
2. Left 'reversed' wiring
3. Right 'correct' wiring

Any insight as to what might be going on would be very helpful, and I appreciate any advice given!

 

[b407driver]

Nothing? No one has any idea what is going on with this speaker?

 

[b407driver]

hmm.

 

[No. 5]

I'll give it a shot!

The "left correct" looks like it has quite a bit of noise in it, and consequently, you might want to remeasure if possible. If not, what do the step responses look like for all three? I find that it can be easier to see polarity in a step response, personally.