husay!
parang ganito rin yung nasa alabang hi-fi show di ba?
galeng!
The one at the last Alabang hi-fi show is my Fostex 127e iBIB (inverted big is beautiful speaker cabinet, designed by a group of members of diyaudio.com), it is basically a folded tapered quarter wave speaker cabinet.
This 167e is similar to a mass loaded transmission line cabinet, with an opening similar to a back loaded horn.