I waited nearly three years for them to become available, PT-F95HF, the "Compact" version of the 90° x 50° Progressive Transition waveguide, JBL Pro part# 338650-001, ~$100 apiece, now used in this product with 2452H-SL drivers:
http://www.jblpro.com/installedsound...7212MDP.v5.pdf
1) Certainly beefier than the $10 version for 1" thread-on drivers (338800-001), and seems like it will independently support Nd drivers.
2) Front view. Same size as the other PT-Fs, with dispersion pattern embossed.
3) The bad news, there's a "problem" with 243x drivers at ~14 kHz. Four samples each 2431H, top (+10 db) and 2435HPL, both using the same compensation filter. Too bad, they look damn good, otherwise.
4) It's not the waveguide, inherently, as they work fine with 2452H-SL. Filter needs less "boost" in UHF with these drivers, obviously.
5) Also fine using BMS 4555, here with compensated Altec 846B filter. Sorry, I forgot to put a legend on the plot. It's four drivers, which virtually superimpose. Be nice if they made a Nd version....
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