Problem with headphone input on iPhone 5

Hi, Everybody .

I used a speaker on my iPhone 5, I guess that the headphone input ''burned because of high voltage or power of the speaker''
I do not have much knowledge on the subject someone to help me.
The problem is that now, the sound on the headphones comes with much noise and very annoying when and when I stop the music makes noise like the frequency of radio and television. Help please