yep. it's like this:
If I remove my subs and put a 4ohm dummy load on my sub amp, play a 0dB tone and measure the output (having not touched the gain from where it was on the amp/dsp) at about the same volume I typically listen to my music at I get about 90w @ 4ohm.

I think everyone who has heard my car has always had something great to say about the subs. My car's geometry has caused me headaches but it's not the subs' fault.