I have had these for 1 week and 2 days. I purchased these directly from Logitech. The right driver unit suddenly got quieter, even though I’ve babied these. I was listening fine with these and I set them down on my desk gently to get a cup of coffee and I came back, put these on and the right driver unit is 40% quieter. I have eliminated my sound card as the problem by pugging them into my phone and they still had the same problem. I also connected another set of IEMs I had (the imetal i390s) and both driver units work fine. I also connected the imetals to my phone and both sides work fine as well. So that eliminates my devices as being the cause of the right driver unit not working properly.
Other headphones of mine work fine on the soundcard and phone with no other problems.
I have contacted Logitech and I will let you know how my experience is with them.
Anyone else here with that problem with this model? or any other UE IEMs??
Edited by rmxcat - 3/8/13 at 2:15am