Ac7212/95

[Zilch]

Can't call it a clone, really, 'cause it doesn't exist.

2262HPL + 2432H on PT-F95HF in Dayton KD Trapezoid kit cab from Parts Express:

[Robh3606]

Ok so what's the deal. Is there a different phase plug in the 2432 and can you drop a 2435 diaphram in there??

Rob:)

[Zilch]

There's a cylindrical throat extension (shown in the pic) in front of what may well be the standard 243X phase plug, which apparently allows this driver to work satisfactorily with PT-F95HF. The 13 kHz notch is still there, but substantially mitigated; I can see it on unsmoothed plots.

Interestingly, the new PT-H1010 waveguide has an additional straight throat section before the flare; it's as if they have abandoned the "no throat" concept in lieu of "fixing" the phase plug. Note that the original AM6200 series is now obsolete.

I have not opened up 2432H to view the diaphragm. The titanium one might benefit from a dusting of Aquaplas; I also ran 2452H-SL in these.... ;)

[Zilch]

WARNING: "EW" WORD! :D

http://techtalk.parts-express.com/showthread.php?p=1661489#post1661489

http://techtalk.parts-express.com/showthread.php?p=1667893#post1667893

Driver data files (FRD & ZMA) in the text if anyone wants to play.

[2452H-SL makes a cameo appearance.... ;) ]

[Eaulive]

I'm very familiar with the SRX715 wich uses the same components but a 2431 instead of a 2432.
Also the horn is 75 x 50 instead of 90 x 50.

Those things are loud, but I think you can't call it a clone since your horn is not rotatable, it looks more like an SRX712M to me ;)

Do you know the major differences between the 2431 and the 2432? I tried to find data but found nothing substantial.

[Zilch]

Titanium vs. aluminum diaphragm, and a throat extension that allows it to work with PT-F95.

2452H-SL would make it a passive clone of VP7212:

http://www.jblpro.com/catalog/support/getfile.aspx?doctype=3&docid=780

Shown in the build thread, that works very nicely, indeed.... :)

[Eaulive]

Titanium vs. aluminum diaphragm, and a throat extension that allows it to work with PT-F95.

2452H-SL would make it a passive clone of VP7212:

http://www.jblpro.com/catalog/support/getfile.aspx?doctype=3&docid=780

Shown in the build thread, that works very nicely, indeed.... :)

2431 Titanium and 2432 aluminium?
I know the 2431 is ferrofluid cooled and neodymium magnet, what about the 2432?

And the 1000$ question, which one is best? :D

[Zilch]

2432 is titanium.

Best? 2452H-SL.

[Gonna try this again, tho: http://www.jblproservice.com/pdf/Theatre%20Series/4722N-HF.pdf ;)]

[Eaulive]

2432 is titanium.

Best? 2452H-SL.

[Gonna try this again, tho: http://www.jblproservice.com/pdf/Theatre%20Series/4722N-HF.pdf ;)]

I haven't see that crossover frequency for a compression driver in a long time!
On the other hand I haven't see a horn so big in a long time either, I don't visit the JBL cinema stuff very often :)

[Zilch]

They only use 2432H down to 1.2 kHz on that waveguide in the 3-way versions in combination with the midrange waveguide.... :yes: