Here's the link.

Sound pressure-wise, there is no practical difference between M80s and M82s. And the beautiful thing is, you can connect them A+B and if you have music that isn't well-recorded, you can shut off the M22s and enjoy the M60s' more forgiving and laid back sound.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated