Paul, how are you testing for HT and not music? It is possible your selecting something with little or no activity from the 80's. I'm just trying to understand, it is so unlikely that both 80's would have issues, so it has to be your setup, calibration, or something.

What receiver modes are you using when testing, what movie are you testing and what scene?

Do you have any music you can try with good bass? Do you have the 80's enough away from the walls so the ports can breath?

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