How do i install a subwoofer into a scion tc?

To install a subwoofer in a Scion tC, start by disconnecting the car battery to ensure safety. Next, run the power wire from the battery to the subwoofer location, securing it along the way. Connect the subwoofer to an amplifier, and then wire the amplifier to the car's audio system, usually tapping into the rear speaker wires for signal. Finally, secure the subwoofer in its enclosure and reconnect the battery to test the setup.