Hi,
I too, took the plunge on an ebay Image S4 from a US seller for $42.00. When the package arrived, all looked OK. Sealed box with the perforated side to open. I put them in my ears and the first thing I noticed was a sound signature of all muddy lows with no definition in the mids or clarity in the highs. When I took them out, I noticed that the logo was almost gone on both earpieces. This was after about 5 minutes of touching the earpieces while adjusting to get a good seal. I purchased these as a backup for my current S4 and neither the SQ nor the disappearing logo was an issue with those. Needless to say, back in the box they went and they are on they're way back to the ebay seller. I called Klipsch and asked if there had been any reports of issues with QC on the S4. He said no and asked me to send them in. Of course, I declined. I have no doubt that the ebay S4 I received was a counterfeit. As meticulous as the packaging and overall earphone appearance was done, they proved to be just a cheap copy. Given all the reports of fake Monster, Sennheiser, Sony............ earphones on ebay, I guess we'll soon be adding Klipsch. This is my humble opinion so if you love your ebay Klipsch, maybe you were just lucky, Rock On. I definitely was not.