Has anyone build Troels' new 3 Way stepped baffle designs?

[lloop9]

Hey guys, has anyone build Troels Gravesen new 3 Way designs with stepped baffle?

I'm interested in building one of the versions but upon looking at the driver placement, it seems that the tweeter/midrange c-t-c spacing exceeded one wavelength at their xo point. Not that I'm doubting Troels talent but seems like many people suggest that driver spacing shld be at least within one wavelength & less. Any comments?

The speakers look awesome I must say!

Here's the Seas version mkII: SEAS-3-Way-Classic-mkII

Here's the Scanspeak version: ScanSpeak-3W-Discovery

 

[Bare]

Dunno try it and see?
I've tried one of Troels' "improvement" crossovers and absolutely could not tell ANY (friends as well.. A/B 'ing betwixt original and improved ) differences.
Despite convincing Web site presentation and documentation.
Clearly someone's Hobby is running a website.
Emporer's clothes perhaps?

 

[LineSource]

Any comments?

To take advantage of Troel Gravesen's skillful engineering you will need to produce an exact physical copy of the design. Troel convineced himself that time alignment from a stepped baffle is superior to a slanted baffle.

Some designers favor minimum C-to-C and will trim the driver frames. I favor this. Some of these designers will still mount the M+T on a flat baffle and the use quasi-optimal crossovers that shift phase to mimic the time delay. e.g.. Deep_M, plus shallow_T drivers at a Xover frequency that creates a 90 degree phase difference can be compensated by flipping +/- tweeter terminals of LR4_T Xover.

Some designers will use a shallow waveguide that provides the exact depth for correct time alignment, and use the wavegide to lower the crossover frequency for greater C-to-C lobing reduction. Very popular in modern monitors where controlled directivity is required for close listening.