He especially talked abut the phase between tops and subs not looking correct but without being able to tell me what to do. I have attached phase plots for various measurents. Can anybody tell me if it looks ok?
No, it doesn't, and the results are in the first two screen shots. Here's why:
Look at the first set of traces here:
Look at the frequency response at the acoustical crossover point between the sub and the top - right around 210 Hz. Now look at the phase response of each box at that point - the phase response is offset. You can see it better if you roll the phase trace plot so it goes from 0-360 instead of +/- 180. Looks like the boxes are roughly 90 degrees out of phase at this point, give or take.
Now look at the summed trace of all boxes:
There's a frequency response dip at that point. If the boxes were in phase with each other, they would sum - at least continuing the trend of the frequency response slope. But, we already know they were not by looking at the individual phase plots of the top vs the sub.
This can all be fixed by applying some delay to the sub. There is 0ms of delay in the preset because Turbo likely assumed (way back when these presets were all written) that this could be adjusted in the field. If the phase traces line up at the acoustical crossover point, the boxes will sum and produce a better frequency response.