swoosh33

My HD5 is only 2 months old and I noticed that the audio output of the right earbud is slightly softer and muffled compared to the left earbud. I'm pretty sure they sounded the same when I first bought them. I've tried different headphones but the result is still the same. I wonder if anyone can help me with this. It is so annoying as the sound is not as sharp as before. Thanks.