Hey, yeah i was going by the rating in my manual for the Asian/Austrailian model, heres what it has listed for different regions. pretty sure its all the same just based on full range signal or 1kHz tone.
2 channel driven:
North American: 75w+75W, 8ohm, 20Hz-20kHz, FTC
European: 100w+100w, 6oHm, 1kHz, DIN
Asian/Australian: 130w+130W, 6oHm, 1kHz, JEITA
Dynamic power: 180w+180w, 3oHm front. 140w+140w, 4oHm front.
95w+95w, 8oHm front.
and yes the cerwins are very efficient, although the onkyo cant get the bass drivers moving really well.