Im not exactly sure, but there are two fuses for the stereo system.
Under the dash, three rows of five fuses, check the second from left, top row, number 2, should be 7.5amp.
Then in the engine bay, between the battery and coolant bottle, remove the cover and check the top left one, 20amp. number 1. Its the left one closest to the coolant bottle if you are facing the rear of the car.