Shoot, I put the review back into the big pile under my coffee table... But, look for the green "measurements" box.

Here is the example from the 750 that I have more easily at hand:

The 750 was rated at 165/250W into 4/8 ohms all channels driven.

They measured 186W/ch all channels driven into 8 ohms, 347W/ch with two channels into 4 ohms, and 550W into 1 ch into 2 ohms. 1% THD+noise, 1kHz.