Hey gene, why do you think the dd+ would perform that much better then the regular dd? Just curious to know.
I have two very similar subs I should compare just to see if there is any performance difference whatsoever, the Hsu VTF3 and the Outlaw LFM-1 EX, but an outdoor comparison wouldn't be fair since the ports of the VTF3 are on a different side than the driver. In-room would be the only way to fairly compare them. If I were to ever do this, what equipment would I need to compare them? How do you go about measuring maximum clean output? Just a mic attached to a computer running REW?