Just the standard D16R2450's, they are suprizingly well behaved. That's one more pair of diaphragms in the mix!
I think JeffW is sending a 2452, the test pile just keeps getting bigger!:D
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Just the standard D16R2450's, they are suprizingly well behaved. That's one more pair of diaphragms in the mix!
I think JeffW is sending a 2452, the test pile just keeps getting bigger!:D
Ooops, forgot that one. I'll send it out tomorrow!Quote:
Originally Posted by 1audiohack
Thanks, when it comes time to send it all back at least I'll get UPS 100+ pound weight break!:p
Lots of very good comments in this thread. Despite the mild comments, I still ended up buying two 2445s for $125 each, with original JBL diaphragms. The intention is to "appreciate" them as they are for a while, and then find some better diaphragms along the way.
Also realizing that I have no choice but going to a four way system and needing to buy another active crossover, unless I make a dividing network (with L pad) between the 2445 and the 2405 with crossover at around 8KHz, and keep running one 3-way active crossover only. The positive point is that it is much cheaper to make a crossover for high frequencies than low ones... :D
I need to revisit these 2445's, after talking with a couple of forum members it is probable that I incorrectly identified the diaphragms, I am reasonably sure they are Ti, but they are smooth, not ribbed as apparently the D16R2450 diaphragms are? This one looks like an uncoated D16R2452SL by sight and measurement. I have a 2452H here that I need to get apart, I will see what that one looks like, another possibility is the diaphragm that comes in the 2451 I guess.Quote:
Originally Posted by 1audiohack
What ever they are they sound and measure good.
So ignoring phenolic and specialty consumer drivers,
the 4" dia seem to be assignable to 5 categories
(other variations seem to only be impedance (8/16) and included
hardware):
Al concentric surround/smooth dome (2440)
Al diamond surround/smooth dome (2441)
Ti diamond surround/smooth dome (2445)
Ti diamond surround/ribbed dome (2446)
Ti diamond surround/smooth dome/aquaplas (2450SL)
...the last three being not limited to the example driver listed.
Does that sound about right?
Thank you. I will have to look again, it's all a blur now.
Slight edit:
Al concentric surround/smooth dome (2440)
Al diamond surround/smooth dome (2441)
Ti diamond surround/smooth dome (2445)
Ti diamond surround/ribbed dome (2446)
Ti diamond surround/smooth dome/aquaplas (2450SL)
should be:
Al concentric surround/smooth dome (2440)
Al diamond surround/smooth dome (2441)
Ti diamond surround/smooth dome (2445)
Ti diamond surround/ribbed dome (2446 / 2450)
Ti diamond surround/smooth dome/aquaplas (475)
( there was no pro model 2" exit with a coated dia )
the 2450SL ( coated, smooth Ti ) was a 1.5" exit - and it had a different mounting bolt dia than the non-coated 2451. 2450SL-a was the coated, ribbed Ti.
The newer 2452SL has the coated, smooth Ti but has a pair of special push terms added to a stock 2450SL dia.
:cheers:
Ok the 2445's that I like have D16R2445's in them, Ti, diamond surround, smooth dome.
Thanks guys!
But will these go into any 2" exit driver?Quote:
Originally Posted by subwoof
D8R2450SL diaphragms fits into all 2"exit drivers. I use them in 2445's with very good results.Quote:
Originally Posted by more10
2452SL diaphragms have different (integrated) terminals, and does not fit 2" exit drivers.
these terminals can be removed without problem
... and added. I've put a 2450SL dia in a 2452H body. I just reused the rubber 'plugs' and threaded terminals.
The 'different mounting bolt dia' referred to by 'beer is for the horn/driver interface,
not the diaphragm.
I haven't tried the TrueXtent dias in the 2452 body, but IIRC, someone here has
(perhaps requiring a trim of the rubber plug/gasket things, as the dia frame seems
a bit taller... I haven't measured them or looked it up).
Cooky did it without major issue:
http://www.audiosmile.com/forum/show...2&postcount=87
I wish he would have taken one more set of pics showing how he hooked the terminals up.