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Thanks, I am clear on the models and exit dimensions. I should have proofed what I wrote yesterday.

You bring up and interesting point about swapping diaphragms. I read a number...

You are correct and I made a cut and paste typo.
Let me set it correctly

The 2451 is 1.5 inch exit and a 4 inch voice coil.
The 2450 is 2 inch exit and a 4 inch voice coil.

I will try and...

No, I am saying the lower frequencies require greater excursion. So normally one would use a 2 inch driver (not the 1.5 inch) if you wanted to cross lower. If all other things are equal (seldom...

I had forgotten the phase plugs were similar (at least in design). So are you suggesting either diaphragm in the 2446 would perform similarly? Since 1.5 inch horns are usually crossed at a higher...

I have confused myself again.

I am using 2446H drivers and would like to experiment with different diaphragms. The Truextent Be diaphragms are too expensive ($950 each).

However, some you...