I was going to ask you if you have managed to do phase measurements before you sent it to me. This pair has some phase issue (confirmed with phasetest from my own test samples and also that link you provided). I hope that this is not a wide spread issue. However from all the complaints around the internet I fear it might be. I am not sure if it really is related to phase or if there is some slight lag between the channels. I doubt this is something you would notice when using these out and about.