nah, dark ambient is soft and creepy and jumps up at weird points to set you off guard.
i was thinking hard ambient would be more like, i dunno, sunno))), who have crazy bass frequencies that have been known to clear peoples sinuses, make people vomit, etc.
and the guy who produces their albums says that he is *always* playing music loudly and never gets any complaints from neighbours, but the 3 times he has been mixing sunno))) masters there have been complaints every time, because some of the frequencies arent audible until you're a certain distance away, and as such there was a really loud boom-y noise 3 houses away driving them nuts that he couldnt hear from where he was >_>
it's just a noise project but if you were going to call someone hard ambient that's what i'd call it