Decided to build some floorspeakers resembling the jbl 's as didn't want a normal box ,reduced the height as jbl were 43" high but reduced to 36 " because of projector screen and height of tweeter is right at that level.Really was a bit of experiment and probably a bit big for my room but nothing ventured.I broke up my cerwin vega E715 s which were great for films and rocking with eq but kept the 15 " drivers as wanted to hear what they would be like in other cabinets,if rubbish then faitel may be on cards.So to match with the old mid range and tweeter have replaced them with audax pro170m mid range and audax TWO25A26 tweeters as they broadly align with crossovers. Speakers are 36" high 23 " to 15" wide 13" deep around 4.2 cu feet. First impressions are favourable with extension to 36 hz sealed but will fit port just to hear any difference and wadding also to hear difference, on my left speaker there is a dip from 800 hz to 3000hz centering at 2000hz with 18 db dip ,any of you pro builders have a idea on the cause of this ? cheers,well listen to some kyama while I quandary.