Michael told me they were his contacts for handling this stuff in the US. They haven't made a very good impression on me. You might wanna find something that can be your stand-in IEM if you end up RMAing your A83. I had my Havi B3 to fall back on, but I wanted something higher end (which is how I ended up with an A83 in the first place) and I wanted to try more IEMs anyway. Now I've got some nice IEMs in my stable including the Earwerkz (now Empire Ears) Supra 2, Tralucent 1Plus2, and 1964 Ears Qi. Also been happily listening to the Trinity Audio Delta and Flare Audio R2A, the 2 IEMs I mentioned Kickstarting earlier. I hope your RMA experience goes much more smoothly than mine.