Thanks, Richard. I was playing some of my classical CDs today, and Wagner backed up what you said. On some of those pieces the peaks can be measured in seconds, not miliseconds so steady state does seem more relevant when you're not just trying to squeeze out a techno drumbeat.\r\n\r\nThose NADs are nice, but way more expensive than my pea brained plot of bi-amping using a pro\/dj amp for the subs. \r\n\r\nI've opened the cases on some pro\/dj amps and found that the Crown XLS series has vertical heatsinks that might work by convection with the fans disabled under easy load conditions. Most of the other brands have heatsink tunnels that mandate fan operation. 300W x 2 for $300? Wahooo!!!