Got my RSX back in June. I hardly blast the radio, usually I listen to 1050 ESPN radio

Anyway, today I noticed the right front speaker making some funky noises. First I thought it was interference, but when I played a CD I got the same thing. Anyone else have this problem? I know the easy solution is to go buy new speakers, but stock are just fine by me and I rather spend my cash of sirius or something. Should I just take it back to the dealer? Any other thoughts? Thanks!

h: