As a general note on Rotel gear, all the reading i've done indicates they are well built and typically measure outputs beyond their specs. You may not have all the specs you see, but you have enough to get the general rating of what the amp can do/does.
I have a Rotel RA05 SE int-amp driving my home office setup. Plenty of power to really crank it. I was looking at possibly investing in a Rotel amp for the HT myself at one point but ended up with an Anthem.
The brochure on the Rotel site reads 200W/channel into 8 Ohms, 20Hz to 20KHz with 0.03% THD max. The all channels driven statement is curiously absent from the owner's manual. The brochure is published by Marketing. The owner's manual is published by Engineering. With twin 1.2 KVA transformers, I can believe the all channels driven spec, if a 20A circuit is being used for North America.
