When seated in the front row lazy boys 13 ft away, my ears are around 41" off the ground, exactly the same distance as the center of the bottom tweeter of the 80's on the platform. That puts the top tweeter around 45.5" which works great for the front row and higher back row.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85