And you are using properly balanced headphones and not single ended headphones via an adapter ?
See if you can try another 4.4mm cable, or another IEM with 4.4mm cable, to eliminate a defective cable/solder connection as a possible cause. From a friend, or a store?Ok now I understand what you guys mean - I always had my IEM's on and didn't hear the relay click from the unit itself. I had mine off when I switched tracks with different clock rates and I heard the click/click from the relays. Unfortunately - I am hearing snap, crackle and pop in my IEM's now that I am using balanced and it's only coming from left channel.... oh oh... sounds like a defective unit