Originally Posted by
RMC
Hi Robert,
2395 and 4530 are short-throw devices (up to 75 feet for 4530) whereas 2402 (40° conical dispersion) is a long-throw tweeter... You'd be better off using the 2405 type tweeter for better balance, dispersion and similar "reach". The original compression driver for 2395 horn/lens assembly was the JBL 2440. The original recommended drivers for the 4530 boxes were JBL 2205H (replaced by 2225H) and E-140 15" which may be difficult to find in original state or with original recones... So, then look-up Thiele/Small parameters on JBL's Web site for the best drivers (2205H/E-140) and try to find a new driver with as close as possible T/S to those to load your 4530 boxes, as well as with response > 800hz for x-over purpose. The 2225H was not recommended by JBL for 4530 use (see T/S) but some people did use it with success they said, and it was the only "suitable" (closest) one left at that time in the JBL catalog.
There is no port in a 4530 but rather a rear-loaded folded horn (scoop). No need to change the dimensions of that. If you did it may not work correctly (according to specs).
Richard