all i have to say is wow...kicker really overdid themselves on this one. I have two in a sealed box with 1.0 cf of space in each side stuffed with polyfil hooked up to a rockford 1000 rms amp and a 2 fared rockford capacitor and i literally jusst left my rear view mirror of because it falls down all the time. definantly the loudest in my town for sure and amazing sq and spl. if you want to f*** some s*** up then these are for you.