[quote name='flyfisher' post='1344804' date='Aug 18 2011, 08:16 PM']Audio watts is not quite the exact science it might seem.
Your calculation is correct but the speaker won't suddenly go up in smoke when the amp output is cranked up to 251W. The general view is that if the speaker is not distorting then everything is fine. Also speaker ratings are generally pessimistic and amplifier ratings optimistic. The max calculated power of 287.5W is only 15% over the speaker rating so I'd be surprised if you could do any damage with this configuration. And, as you say, you're highly unlikely to be cranked up to full volume anyway. I wouldn't worry about it.[/quote]
Good answer.
If you ran it flat out volume wise and were pushing it to the limit for an extreme duration of time, you might get a problem.
You will probably be fine because that's a loud rig!