I have these 'out of the box' moments sometimes.
This time it was "what if a person had either 3 Hathor 1203's (or 2 H1203 + a TC112.8), also a head that would safely handle 2.67 ohm (or lower) and they took 2 of the H1203, set them almost back to back, one facing stage right, one facing stage left, then put the 3rd cab facing the audience in the middle on top of the 2 H1203 - so one firing left, one right, & one straight outwardly?
Duke could tell us how much space there'd need to be between the backsides of the H1203 to let the ports breathe.
If that was wider than the width of the 3rd cab, that would make the whole thing a no-go.
I'm not sure if there might be cancellations at the lower frequencies caused by the opposite firing woofers, I doubt it, but I could be wrong.
I bet
@tombowlus has 2 of the H1203, don't remember if he has an 8 ohm TC112 - I'd expect a 4 ohm TC112 to sound out of balance due to getting more than a third of the wattage, but I could be wrong. Also, if the TC112 was 4 ohms, you'd definitely need a 2 ohm amp (or a 2 channel power amp or one like the Genz Benz ShuttleMax12.2).
Wish I had 3 H1203 to experiment with (I'd need a 2.67 ohm capable amp as well) - twould be a hoot!!!