It's a 705s. I am using it to push 4 full range speakers and a sub.
From what i heard, Soundstream doesn't take the heat too well. That is why I am concern about the overheating. From what I estimation, the amp runs at least 70C or more. Now, if weather gets even warmer, I will guess the amp is likely to reach 90+C.
From my work experience, electronic components won't survive in that kind of temp for long.......