I would say the mag is a SQL sub. It has hit some very impressive SPL numbers, but still is very clean.
As far as comparing it to an 06 XXX. I have never heard one of the new ones, but my guess would be that the 06 XXX would be much louder when compared to 1 mag. But for the price of the 06 XXX, you can almost get 2 mags, and in that case I would say that you would probably get more output out of two mags, than one XXX. But compared one to one I with the XXX's specs it should have more output.
how much power you have? i would think that with 1200 or less the mag would probably get louder? the mags are dual 2ohms as well so that mtx amp wouldn't work very well
power isnt a issue right now... i have a RF power 1501bd (birth sheet said 1633 rms) but i know i will need atleast 2k for the 06xxx so i will just buy another amp if needed... i only have enough room for 1 sub ported in a big box... if i could fit 2 of the old xxx i think that would be a better route to take but i am unsure how much room i need for all the dif. speakers out there... i know the specs are a way to find out but i also know that the specs they give are not the best ... everyone seems to make there boxes bigger there for i should only have room for 1 sub ported... so thats why i was wondering how the 2 of them compair... i know the new xxx is really expensive but if i can only fit one sub i want the best i could posibly get you know what i mean... i dont wanna have to buy sub after sub until i find the right one... i want to get it right the first time... so any help on this is extremely helpful.. thanks guys