I know right... But seriously I just don't think it would really make that much more power than the 40.1, but like I said there is a local guy, he's got some RD subs, he has a world record for a couple years, kudo's on the subs to RD, he was running db drive amps but switched to RD amps recently and I think he is down in score but I think he's on a new build too, so it may take some tedius tuning of the vehicle and enclosure to get it back where it should be (this is what I heard anyway). I think he's running the D9's now. I am sure RD knows who I am talking about and probably is gonna tell me I am wrong, but if not then I may run up there at some point and see if he will let me clamp it, but he probably won't, the guy usually won't let anyone get near it, period. **** comp guys and their secrecy bullshit, Hmmmm... suspicious maybe... but anyway, if it does do that much more power for real, then awesome, but I just don't believe that until I see it for myself with my own clamp. Oh, and RD. Kudo's too on adding the fins to the heatsinks. I think I worked on a couple RD's for people a while back, they were just like flat heatsinks, no fins, really light, was like a "hot plate". I am sure the fins help especially when the amps are really getting it at .5 ohm and all, heat is the enemy.