That 96db sensitivity rating is misleading, that rating is an in car rating, all other manufacturers use an in lab rating.
So the Infinity's actually have a sensitivity of 84db in comparison with other subs.
HZ response is simply frequency response IE-20hz to 20000hz
In car ratings always tend to be 12db's higher than in lab rating's
this is because of a thing called "cabin gain" it simply means that a sub will sound 12db's louder in your car than in your living room.
What do you expect from your subs? Because I owned a pair of Perfect 12's and although I thought they sounded awsome in the 15hz to 60hz range, I found that they didn't keep up with the 60hz to 100hz range all that well and that their maximum spl was not all that impressive, I also thought they didn't hit all that hard.
A lot of people will tell you that the Infinity perfect 12 is the be all end all of subwoofers, ask them if they have ever heard subs like Eclipse 8712, ID MAX12, Audiomobile MASS12, Beyond Audio X-one 12, Crystal CMP12, These subs put the Perfect's to shame, ABSOLUTE SHAME! in both SQ and SPL.
This is not an opinion, its a cold hard fact.//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif