Were you asked to return the original faulty unit back to Audiosense before getting a replacement? Seems like they didn't use quality BA's for this particular model.
They kindly sent out a replacement to me without having to send back the faulty unit. I would hope they would do the same for you but I would advise speaking to AS via their Facebook or email to confirm.
It's a shame because apart from the initial teething issues the DT600 with a 30ohm impedance adapter is an excellent all BA performer at this price point.
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