Location: cheltenham
Posts: 746
I'm matt.
Location: Seaford UK
Posts: 1,861
I'm Dennis.
Whether or not the enclosure is resonant or not is a side issue to the fundamental point; of course we want that to be zero, and it never is.
Actually Matt I do not like text speak, my shorthand is from decades ago when they were standard in telecoms and electronics - a taste of things to come.
LF, HF, Xmission, I/P, O/P, numerous mathematical ones and those of course used by speaker designers, eg. Cas, Xmax, F0, F3.
I don't know what BIN is though. (OMG LOL SpkL8R)