yup.... usually lot of marketing gimmicks....

usually when they say 1000w 4channel amp, its usually 250w per channel at the lowest ohm it can go... if the amp is able to run at 1 ohm, its 250w at 1 ohm.... but in real world, few amps can run at 1 ohm (there are amps that can run at 0.25 ohm, but thats another story)

I would assume the amp (highly rated, qood guality amp here) is 125w X 4 @ 4ohm, measured at 14.4v.

But then again, good and branded amps usually dont advertise their product as 1000w 4 channel amp.