"Will amps kill my cars electrical system or is it volts that wreck it?"
It's amps. Voltage remains at 12 VDC. And with any luck, yes, it will kill your electrical system. I'm certain your neighbors would agree with me.
Regarding the hearing loss comments, this is a real issue. I had a neighbor who blasted his music constantly, and both of his kids have serious hearing loss. I jave another friend, retired secret service, who will suffer serious hearing danage by spending too much time around Air Force One.
I strongly urge you to reconsider your "jammin'". Unless you want to spend your middle age with a hearing aid and your old age deaf.