Jacob even though I would like to meet one of your reps, Sean Ballenger in a dark alley you always give honest opinions. I have that bug that makes me want to always change thing up but I have to know its for the good. In your experianced opinion how would the Zv4 do against a super charged 9512i? I look for 25-45hz strong, the DDs are doing much better then the DC XLm2s did in every department. I'm maxed out on box size right now so the Z will be going as a drop in. We have 2 cubes net per sub with 16sp inches of port per cube tuned at 32. I have impressive output 25hz to 45hz with flat 33-40hz now. Power will be a DD M4A or NS-1 if I go with the Z. How would you compare the two drivers on box size, power, and responce where I am looking for it?