How do you install a amp to a Impala head unit?

To install an amplifier to an Impala head unit, first, disconnect the negative battery terminal for safety. Connect the amplifier's power wire to the car's battery, ensuring a fuse is installed close to the battery. Run the ground wire to a solid metal point on the vehicle, and connect the remote turn-on wire from the head unit to the amplifier. Finally, connect the speaker wires from the amplifier to the speakers, and reconnect the battery.