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See More Reviews These produce great sound and the for the price these headphones are a deal.
However I joined the April 30th drop and recieved them shortly afterwards. Today is June 22nd and one yoke has already broken. The design of these headphones transfers a large amount of stress to the yoke when used and the plastic the yoke is made out of is poor quality and brittle.
Hifiman does not sell replacement parts. They want you to ship the headphones to them to do the repair which costs roughly the same as the headphones.
Thankfully Thingiverse creators to the rescue.
I found this https://www.thingiverse.com/thing:2872936 and I've ordered a set ($20) to attempt a replacement. I will update this review with more pictures and story when I'm done.
Edit 1: I just got notified the replacement 3D printed yoke halves shipped. | 06/25/2018
Edit 2: Received and replaced the yoke. Print is good. I ordered a Nylon based plastic that at least feels and looks stronger than the original yoke. The process to deconstruct the old yoke goes as follows. The videos below are not mine but are the closest thing I could find to video tutorials. | 06/29/2018
Step 1: Remove the two screws securing the joint to the headband. They are tiny and black so put them someplace easy to see and secure.
Step 2: You need to twist the speaker a bit around to loosen the two pieces and break them apart. These popped apart for me and fell to the floor. Put these with your screws.
Step 3: Separating the pivot from the yoke is a destructive process. In the video below the yoke is broken apart. A dremel tool with a cutting head makes this much more controlled and far easier.
Step 4: Orient and press the pivot into the new yokes being careful to watch the orientation of the rotation arrest pin. After using some force to seat the pivot you're going to want to use heat to help fully seat the pivot into the yoke halves.
Step 5: Once the pivot is fully seat use epoxy or super glue to join the halves and secure the pivot in the finished yoke.
Edit 3: 07/09/2018
The second yoke is now showing cracks in two places. I've ordered another replacement to fix it. I will update when the second new yoke is received and the replacement is complete.