My first thought was just to send the headphone back and pay, whatever, $40 for them to install a new cable. Then I realized that it would probably just split again in the same way, and I don't really want to open the cups and solder on the driver itself.   My question is this: Can anyone...

Last week I built a Banzai V2 18v CMOY amp.  This is my first amp build, and the first headphone amp I've owned.  I've been using it for a week without any problems to speak of.   I noticed a phenomenon today at work where I'm getting a pretty pronounced crackling buzz with peaky treble...