Thanks, before you send any plans . .

I didn’t mention it, but I have a pair of JBL 2202s, that are Fs 50 Hz, Qes 0.17 & Fhm 588 Hz. To get value from them I wanted to cross to a mid horn at 500 Hz. If I cross at only 200 Hz I’m throwing away a lot of their potential. (I’ll use a sub under about 70 Hz).

I could sell them, but they’re very good.

Yes a simple conical horn could be perfect above that, and have a driver in mind that’s good over 500 – 6000 Hz.

Do any of the plans, by virtue of smoothness one octave into the lower mids, fit this need?

Thanks