MacBook Pro Audio Problems!

I have been using my new MacBook Pro Retina since Christmas when I got it and loved it. However, I recently noticed that when using my Bose QC15 headphones with it, I was only getting audio in the left channel. I replaced the batteries in the headphone and made sure that the plug is firmly pushed in on either side and am still only getting one channel. I also tried using the headphones with my iPhone 5 and they weirdly worked fine. I want to know if this is a problem with the audio out port on the MacBook Pro or with my headphones which I don't think it is.
Thanks,
Lorenzo

Is SYSTEM PREFERENCES>SOUND>OUTPUT has balance in the center,  take advantage of the warranty and have it fixed at an Apple store genius bar.
Ciao.

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