Hi,
I have a set of JBL drawings that they published in the 1970ies for their then new K series. I'm quite sure that I've yet found them here some days ago, but cannot find them at the moment. The drawings show two vented enclosures of 3.75 cuft and 5.75 cuft, resp. The smaller one was for one 15" driver K130, K140, or K145, or two K120's. The baffle drawing contained a list of suitable port dimensions. E.g. the K140 requires two ports of 4" dia and 2" length.
Which port length will a 2225 require for smooth LF performance? And which for a 2205?
Best regards!