Hi Greg,
The Augie open baffle subs work VERY well with The Horns.
I took one of the Augies to the recent HornFest at Ed's place and once it was hooked up, it stayed in the system pretty much for the rest of the 'Fest by request of those involved in "serious listening" .....

It's a different sound than what you get with "traditional" subwoofers, but once you "get it" it's hard to turn back .....

It was kind of humorous to be listening to a system that consisted of a $750.00 CD player, an $800.00 pair of speakers, a $300.00 open baffle sub and a $31,000.00 (Dowdy Lama) amplifier ......

Sounded mighty good ..... not for the faint of heart.
I have not heard the new mini cube, so I can't comment on it.
Best wishes,
Randy