I bought a FiiO E10 back on black friday for their sale. Up until a week ago, everything was great. until A little thing happened I was unable to fix, the gold o-ring in the jack broke off and now my headphones constantly ground periodically when listening to music. I emailed FiiO a week ago, and haven't received a response. Here's the email with picture links included. Hi, my name is Kyle and I recently purchased a FiiO E10 USB DAC Headphone Amplifier from Adorama.com. I have the entire receipt and can either link you it, http://i.imgur.com/aWrXB.png or forward/attach the email if needed. What's currently wrong with it is the gold o-ring fell out somehow, and now I'm concerned that it might impede my listening experience or more importantly, ability to resell the product if I feel that I need to purchase a better amplifier in the future. I have a photo of that on the internet too. http://imgur.com/qkoA9 Thank you for your time, any response is appreciated! Guess I'm just too kind sometimes. I'll try calling FiiO on Monday, but it really grinds my gears when I take the time to write a letter, and don't even get so much as a response back (even from a bot). Checked my spam folders all the stuff. Nothing. Has anyone else had this problem?