The two 8 ohm Seventy-80s could be wired as 1 - 16 ohm in series, 1 - 4 ohm in parallel, or 2 - 8 ohm separately. The SC20H can accommodate any of the 3 configurations, so the answer to "is it possible?" is yes. First step would be to get the SC20H, and decide on the speaker hook up after that. I'm just surprised that no one has criticized plugging an SC20H into a pair of Seventy-80s.