hey Lionx,
as far as i observed, it does a fantastic job for most of the regular music.
It handles most of the latest telugu, tamil, and hindi songs well, unless they are very fast beat with too many instruments.
The moment I play anything like Linkin park, Aerosmith, Greenday etc etc.... some degree of clarity is missing in HF.
Just for a try, Im going to club it with a compression driver HF100 from Faitalpro.
I may try Phase plug experiment also later on.
by the way ... Can you give few more details on JE labs design please .....
Please go ahead and let us know the effect of adding the compression driver to this. Below is the link for JE labs design,
http://jelabsarch.blogspot.com/2012/06/open-baffle.html