amplifier - Single NPN Transistor Audio Preamp

I try to make a little project for school.I used the following schema to create an audio amplifier.

For the circuit I used:

C1:104j63 capacitor (1uF)

C2:103j (0,1uF)

My problem is that the sound is lower than direct input.

I changed both capacitors with a 104 and the sound was same as the input but more distorsioned.

PS:The transistor is connected correctly.