Thanks. Very kind of you. You could cut at 500 hertz (?) How the mid highs driver handles frequencies? Has It an internal x over?
The crossover is all DSP (external, using a
MiniDSP Flex), except the D2 uses passive filter with complimentary DSP filter, plus the driver's roll-off. You could do this with a nice DSP plate amp, or many other options.
I have used the JBL DSP filters exactly using 780Hz cut, and also my own profiles, with great results. I've also used several different values of cap for the passive filter.
Here is one example of a different DSP solution that I cooked up, line on line on top of Erin's nearfield measurement:
It measures great far-field as well. I have other PEQ versions that match JBL's profile in the crossover region too.
This driver and lens in a 2-way the above 8uF ~780Hz passive filter makes sense - it compliments the driver's natural low-frequency behavior. There are a jumble of measurements and ideas in the
D2 thread. I have done lots since, but it has the starting point and some references to other work, mostly by
POS at ASR and the
Project M2 DIY Thread. I'll try to update it since I have tried a bunch of different DSP and passive configurations.