Originally Posted by
Jim Hodgson
I’m considering buying a pair of JBL 2421B drivers, which I’ve seen (but not heard) in person. I snapped a quick photo of one of the diaphragms, and I wonder if someone could guide me on both authenticity and condition, please?
My priorities are genuine factory aluminum diaphragms correct for 2421B. DCR readings were around 5.8 ohms—which I believe is “close enough”? How easily will those bits of urethane foam clean off the terminals and diaphragm surface?
I’d be most appreciative of any pre-purchase help. Thanks!