I'm limited on the style and size of enclosures I can build because of how it has to fit in my vehicle.
Also, daily is going to be out of the question because I can't fit a 12" sub in a daily box in a regular cab s-10.
I can try some different boxes, but right now don't really have the time, motivation, or cooperative weather to do so. In the future? Perhaps. But it's gonna take a miracle box for the Q to get near what the 9512 is doing with the same power. Plus there's the distinct possibility that whatever box gets the Q louder will also get the 9512 louder.
Just curious though, what do you mean by "less cone displacement"? Something smaller to limit excursion? If so, I'm 99% confident a smaller box wouldn't work because it would hurt my peak note which likes to be in the 41-44 hz range. Going for a smaller than optimum box leads to my truck peaking high and the score tanking, even with more power.
All things considered, the Q did pretty darn well. I'm not expecting it to be on par with the DD, because it really shouldn't be.