Oh is it a common issue? So I should keep my unit and not try a 3rd replacement? From my searching I've just seen people tell those who mention the issue to get it replaced. Btw, I've tried it with sennheiser 560S, 660S & Focal Elegia. All are noticeable to me, they are 120, 150, 35 ohms...

I really like this amp. However I noticed there's channel imbalance at around 9 to 10 o' clock. This seems like the spot everyone who mentions imbalance hears it. I got the amp replaced and the new one has the same issue at around the same spot. I mean the 2 units I got could've been the same...