I know there has been much discussion on this, but I very much doubt there will be any correlation between speaker type and phase.

For me, all my speakers again have +ve phase after tweaking their distance settings (I know the theory that distance does not equal phase, but it does for low frequencies where phase anomolies are most noticed). My analogue sub was set with -ve phase until I increased the distance by 1 foot (after hearing M state that you should measure to its centre rather than leading edge). My centre D33 was also set as -ve (compared to the D5000s L/R), but is now +ve after setting L/R/C to the same distance (the C was set 6" further back before).

So for me, distance and I suspect room geometry have had a far bigger impact than speaker type.

I also have a slightly offset listenging position (I get the RH sofa seat, my wife the left, so I tune for my position rather than the average).

Playing a test tone at the Xover frequency was the most educational thing that I did on this subject, as just by moving your ears around the room you can hear the holes in the sound due to negative interference of the bass wave fronts. You won't hear that at higher frequencies as the holes are so small and because they are filled by room reflections.

Don't mean to be contradictory George - let's by all means collect some stats and see if there is any correlation.

FL + 10'6" 0.0 D5k
C + 10'6" -1.5 D33
FR + 10'6" -1.0 D5k
RL + 6'0" -2.0 D33
RR + 3'0" -2.5 D33
Sub + 12'0"-2.0 Rel Storm

HH1 Photo 34. 598DP, 504, 518, 561(M), DSP5000, DSP33C, DSP33
2nd Room: 541, 555