Yup, the XLR to RCA adapters.

I was thinking about using a Behringer as well, just a little bit less money. You did notice that the one you linked to is only 230W into 4 ohms. It's bridged to get 500W and in bridged mode it won't run M80s.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70