Soundmagic P30, badly matched drivers?

Hello everyone, as most of you I've been reading a lot on the massive portable headphone shootout before my purchase. In the end I went with the Soundmagic P30. I just received them today and noticed there's a clear unbalance right out of the box, as the left driver is clearly louder than the right. I've bought quite a few headphones before and never had this issue out of the box, is there anyone who own the P30 that noticed this when they're new? I'm letting them burn-in now but maybe they're simply defective?

I've let them play overnight and it's better now, but still it's slightly louder to the left, I have a rockboxed Clip and with the balance function if I set it to 3% louder to the right it sounds just right. I'll let them play one more day and shoot an e-mail to soundmagic and see if they've got any ideas.

I was just unlucky and got a defective pair. Got them replaced now and I'm enjoying them. I was thinking about K518 or the P30, but the portability of the P30 won. I can fold them and put them in my jacket pocket which is most probably not possible with the K518.