Virtually no amplifier actually doubles power into 4 ohms.
Many amplifiers may claim this, but, typically, they are under-rated into 8 ohms, and slightly over-rated into 4 ohms. Unless they have no current limiting, in which case the reliability may come into question. On to your answer...
The mc7100, if bridged , is not designed to operate into 4 ohms. It might overheat and you would be stressing it if operated for extended time at full power. If you do NOT listen very loud, though, and just want a lot of power for peaks, then it will be fine.
Do not stack anything on it, give it a few inches to breath.