As the title says, I finally finished by IB using (2) of the Tumult drivers. I previously had been using (2) Tempests. I am currently powering them with 1 channel of my Carver 753x. The manual states that it outputs 750 watts into 2ohms. Does this mean that each driver is seeing 750 watts? or is each driver seeing 375. These things seem to be working at about 25%. I thought IBs didn't require as much power to reach x-max. Don't get me wrong, these things sound awesome, but just seems like driving a Corvette at 40 mph when you know it can do so much more.