Funny you posted that, as it may be the only exception. It is based on the lms ultra structure like the op's sub, but its tripple stacked motor, and is much stronger. It is not available as of yet, and it has not been proven to run at 5k daily yet, but I would not doubt that woofer. As for the op, the 8kw rms statement is simply not true. No woofer that I know of will handle that power daily. If you think it can, then send it on my way, and I will get ahold of scottie j, as he has as much power as anyone would need. We will put it to the test.
Also, apparently you dont know how many times steve mead has blown his btls running them at 4kw each.

A simple vid does not show me that it can handle that power all day every day, for hours on end, with no rest. My sub can handle 5k just fine, maybe not all day, but certainly long enough to make it through that video, and more..