Thanks I just read the graph on the 2397 frequency curves low and high. The tweeter and mid are not the issue the issue is the low frequency driver I can use in a 3way speaker system that will cover the full spectrum frequency range at crossover points between the low and the mid. Does anyone know how high I can crossover the 2235h 500? 800? 1000?
First off, I would recommend reviewing which systems JBL used the 2235H in to give you an idea where it was crossed over at. My experience with the 2397 coincides with the fact that the lowest crossover frequency JBL recommended was 800 Hz. The highest crossover frequency JBL recommended for the 2235H is 1K. That means you have a 200 Hz window to play with.
Second, being that the issue of the crossover point between the horn and the tweeter may be of no concern to you, it still doesn't change the fact that standing waves will occur between the parallel panels of the 2397 at approximately 4.9K. It's not my opinion, it's a question of physics. Eliminating standing waves will reduce distortion in that frequency range.
Coincidently, from the 2397 data sheet: "...with only minor lobes appearing above 5kHz"
Why not cross over below 4.9K and rid yourself of a second problem?
Possibly because then it limits the choice of JBL tweeter to a 2402 bullet topping at 15KHz which is not as nice sounding as a 2405 with its sizzling highs extending to 21KHz
JBL 2402 - http://www.jblpro.com/pub/obsolete/2402.pdf
JBL 2405 - http://www.jblpro.com/pub/obsolete/2405.pdf
If non-JBL components are considered, then a ribbon tweeter can be used. They can be crossed low and they reach high.
http://www.parts-express.com/Search....itesearch=true
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