How do you change a car's sound system if it is the standard configuration?
You could drill little holes in the speakers...just joking! :)
Usually when replacing you may obtain information from the seller
for the specific replacing system. Which car are u talking about?
You may need to know this to find out if the new system is
compatible with the car. If doing it yourself, you will likely need
some technical knowledge. Careful not to damage the finishing
inside or short the power supply, or to disturb some anti theft