10-30-2021 Post does not mapped to Knowledge Tree koh123 Mobile, AL Posts 6 Joined on 05-20-2021 Post #: 1 Post ID: 26462 Reply to: 26462 JBL 2446 The picture shows a JBL 2446. It shows where one attaches a horn.  The exit hole in the center of the driver is about 2 inches deep and 2 inches in diameter.  Is that hole part of the throat chamber or does it count towards the first 2 inches of length for whatever horn you attach it to?

10-30-2021 Post does not mapped to Knowledge Tree Paul S San Diego, California, USA Posts 2,644 Joined on 10-12-2006 Post #: 2 Post ID: 26465 Reply to: 26462 Elementary Hi, koh. Not to leave you dangling. The info you seek seems to be JBL horn specs, and maybe common JBL CD/horn practices, available at JBL sites. Good Luck. Best regards, Paul S