I have a biamp set up. Not sure why you’d want to go full scale tri amp. Absolutely too many wires and interconnects to deal with and then the crossover machinery is very difficult to figure out which one to buy and there aren’t too many examples out there people doing this that I could find.
Further if you’re going to do tri or biamping, I would think you’d want to get a tube amplifier involved to deal with the upper drivers because that’s better for the harmonics and the solid state amplifier could handle the bass drivers. And this is the best of all possible worlds.

