Hi, Magnum78,
All ratings are relative. This one is too. Marantz is lightly cunning. I will show on example of M-CR603 which I own. Both are the same it seems to me. You can see two measurements in the manual:
Nominal output
(1 kHz, total harmonic distortion 0.7 %, 8 Ω) 40 W + 40 W
(1 kHz...