206 rear two door loudspeaker advice

Hello friends, I bought the car, but I don't hear sound from the speaker of the two rear doors. I think I can get 13 cm speaker advice.

In the 206's it was necessary to turn on the rear speakers from the computer or something. ali knows these works;)

Like in the front doors, I had the equipment of the back doors in my kinda music.

Thank you friends, I took the car to the service for maintenance, I said to the master, the master said there was no sound from the rear speaker, he looked empty inside the speaker socket.

If there is any installation on the back doors, what should I buy 13 cm oval coaxial or componet ... I will use the original tape ..

Coaxial taking will be sufficient. Amplifier required if you buy components

thank you ..