Mine is the 2 channel rubicon version, bridged to a 10 inch pioneer premier sub that requires 250 watts rms. A friend who had it for a few years gave it to me and told me I probably wouldn't have to swap it out again as long as I have the truck unless I decide to upgrade. So far it's pushed my sub for over 2 years with no problems in addition to however long he had it in his Dakota so it seems like he may be right. It was free so it's no loss to me if it blows and I wouldn't mind trying some of the newer shallowmount 10s that are coming out so I've abused it ever since it's been installed and it hasn't broken yet.
I have no idea if that 250 watts is what the pioneer has been getting from this amp but it sounds good enough to me that I see no reason to upgrade until the amp dies. The only weakness seems to be some low end distortion in only some of the lowest notes on some of my blues songs that have really deep, really dynamic bass. This only seems to go away when I lower gain to the point where it takes away something from songs with more subtle bass. I'm not even sure whether this is an issue with the sub or the amp. It may be that there just isn't quite enough power there and if I tune for songs with average bass anything really deep makes it clip. But it sounds good except for maybe some occasional deep bass notes in maybe 5% of the music I play. Easily rememdied by a quick adjustment of sub volume. Other than that the sub hits hard for rap and shakes my rear view mirror enough to please me with the gain adjusted only a little over half way up.
In general: Seemed like a marketing gimic designed so they could throw out an amp with average or only slightly better than average capabilities for the time but create enough mystique that people would still snap it up. The way it's been explained to me is that matching subs to amps watt for watt isn't as crucial as some people think but you still have to ballpark it to get the most out of everything. So I wonder how many sales they lost because people couldn't figure out what they could effectively match it with. Notice, nowadays they've gotten away from that strategy and are now rating their amps.