As I explained to AWE performance when they were installing the new switchback exhaust, I didn’t buy the car for the stereo. So no one else gets their nose bent out of shape, I did send the OP a few questions that he needs to answer regarding current setup, before proceeding.
In gear and parking brake on. If on incline, wheel should be turned so that if brake and gearing doesn’t stop car movement, the curb, if there is one, will