Yeah, I've been switching between my custom cable and the quarter inch that came with the cans. They all have had the same issue with both cables, so I'm fairly sure the cans were the problem. Hopefully the cables I used thus far haven't all been defective, though. That would suck.

It seems my case is not very common, but if you purchase a pair of these (or ANY audio product), I highly recommend purchasing from a seller with a good returns policy. I honestly don't know why so many audio products have QC issues these days.

It's probably the unit. I tested with the stock cables and my custom ones. I'll probably return them and pick up another pair.