Hello All,
I've been looking at building a 4560 bass bin and noticed that JBL has several versions : 4560, 4560A, 4560BKA.
They have low freq. responses of 45 to 60Hz with the same driver.
There does not seem to be any major differences in the boxes and I was wondering if anyone had any ideas about this.
Oh, I'm looking for enough information to build a 4550.
Plans, line dwawings, or measurements would be appreciated.
Thanks, Doug