Ohn, you do not want to lay the m80 down, that would make no sense and defeat the whole design of the speaker. You might as well go to a VP150 which is designed for horizontal placement.

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