Well I've had my UHA-6 MKII for a few weeks but haven't given it much serious listening time. I got a mini to mini OTG cable and finally got around to using the Leckerton with my GS3 today and the UHA-6 picks up tons of interference. Its ok when just music is playing but if i use the phone for anything else (which I usually do) it is unbearable. I am surprised I haven't heard of this issue if its common. Anyone else have this problem? :(
Which Op-Amp is in yours? It would seem that the OPA209 particularly can pick up interference.