As many of us know, inductance can be a very hard thing to measure, let's hope that this motor measures similarly in inductance to others like the Havoc or Rl-p. Personally, I would pay much more for a driver like this if it has lower distortion> $300-$400 is more in the bargain bracket, if this is a 55lb driver, I would expect to pay $450-500 for it and wouldn't look back. Also, Kevin says it is not optimized for small boxes, but as far as current 18's go, I would say it does fairly well. With BL as high as that and its QTS fairly low, I would say that driver would work fine in 5-6 cubic foot box as long as it is well stuffed. Now some people may think thats a big box, (and it is compared to the TC5200!) but I think its nice and small for an 18! The market is ripe for another ultra premium 18 with TC gone, We have the Rl-p, the Fi Car Q and the Havoc for $300-$425 drivers, I'd like to see a good $500 driver leading the pack again, something with over 30mm of xmax 1500-3000watts power handling.