I don't have the driver impedance handy, but here is the speaker's finished impedance.
You can see the FE83 goes squirrly right around 2khz 🙁 It was pretty bad. It served it's purpose (compact horizontal MTM center channel) but wouldn't use it otherwise.
Yes, as you noticed high passing a Full Ranger right near it's Fs is a real problem as well, although a little different. Somewhat outside what I was getting at in this thread, but a reall design consideration as well.

You can see the FE83 goes squirrly right around 2khz 🙁 It was pretty bad. It served it's purpose (compact horizontal MTM center channel) but wouldn't use it otherwise.
Yes, as you noticed high passing a Full Ranger right near it's Fs is a real problem as well, although a little different. Somewhat outside what I was getting at in this thread, but a reall design consideration as well.