Okay guys here is the plan and challenge.
I plan on using this line of drivers. Please check them out:
https://radianaudio.com/collections/coaxials-ferriteNow the next trick is to mate them with a woofer or pair of woofers below each driver that matches them in size and cabinet width.
I want to keep them an 8 ohm load so that they are easy to drive.
I would like to use the Radian woofers as well. These kits are for them also. But they currently don't have woofers that really suitably fit. They are willing to make some new variances of the woofers and higher impedance loads (like 16 ohm woofers) so that they can be paralleled to get back to 8 ohms.
And they currently do not have 8" or 10" woofers.
A lower cost all passive version might be more ideal if a sealed box is used and a low extension is not a target goal. The reason being is that a big bad speaker that plays down really low is hard to get good room balance on (heavy room gain down low) without some way to adjust the lower ranges. And large ported woofer start requiring huge air spaces.
So maybe I can figure out a passive woofer solution for the 8" and 10" coaxial models with 12" servo subs for the 12" coaxial model.
Now return to the discussion.