For you to crack Solid Cement on the ground...Its like having a Jackhammer smashing the ground...but if your in the car it would be like smashing your chest. That would be well over 200dbs. At 170 Db kills a person....so it might possible with like alot W7 fully powered on the ground and you about 100 feet away. Otherwise not going to happen....Good Luck
crack my a$$
Try this set up to crack the pavement, A 120 V power cord with a person wearing gloves, hard hat and goggles all in route to a central device called a Jack Hammer!
just for the record, you're not going to hit 200dB since it's atmospherically impossible to do without altering the molecular make-up of the air you're compressing, such as is done by the liquid nitrogen engines of the space shuttle at launch, at ground zero. Don't bother with speakers in a car.
I once drank a 5th of Wild Turkey with Diet Coke of all things in one of those big a** Giant Pisser size cups from 7-11, making me very woozy and I bailed out of the car and cracked my head but not the concrete. Don't know the SPL or SQ of my head at the time but I doubt any amp or woofer made today could match it, and the concrete was very much in tact. Hope this helps, maybe some Everclear? donno.........