The Fearless F112 has a larger cabinet and goes deeper than the Thunderchild. I think Greenboy's target is usually the first overtone of low F#, while mine is the first overtone of low B. The MAS 112 is a monster - imo its competition would be my Thunderchild 212. If you only need 112-level output, look at Mike's smaller cabs - he can advise you better than I can.
As for size/weight/price, thank you for your comment - I have tried to make my cabs relatively affordable for "ubercabs".
I'm fairly confident that my Thunderchild cabs would make decent full-range speakers. They are being used as such by several people, including an award-winning studio designer.
Now as far as PA speakers, I'd say that my Thunderchild cabs might not be ideal as they now stand. The power handling of the compression driver is quite adequate for electric bass, but PA is much more demanding in the region that the compression driver covers, so I'd probably want to go up a notch or two in power handling if PA was on the menu.
This is starting to sound like a project I have worked on some but never really brought to completion - something I call the Multi-Role Loudspeaker, or MRL. Basically it's a Thunderchild in a bigger box, with a significantly more beefy compression driver, and probably a different horn. The MRL would make a decent light PA or keyboards or studio cab, in addition to bass guitar.
My current generation Thunderchild cabinets have a switch that goes from "smooth" in the upper mids to "a bit of growly", but it's still not a really aggressive tone in growly mode. The MRL would also have this switch. I'd have to go to a three-way cab to get significantly more aggressive in the upper mids while preserving the hi-fi-ness when the switches are set accordingly, with the weight and price also going up unfortunately.
I hope some of this helps.
Great explanation Duke. When I mentioned using a TC115 as a PA cab, I should add that it was vocals only, no bass or kick. ...sounded wonderful.