in a 1.3 cft sealed box its -3 db rateing of 10 hz 14 hz for 1 cft! and a sweet curve that actually boasts higher output from a sealed box. its a jpg pic that i cant cut and paste.
welp sq is noooooo contest favor idmax spl would depend on how you set it up the idmax has 24.9 mm one way xmax,Xsus (maximum) 3.5” peak to peak
, handles 1000 watts rms (under rated prolly as well as every one of images subs has been. tom nousaine drove it with 2500 watts in his test) never sen in in action in an spl car they were too new