[fablestruck]

@fablestruck the IE 400 Pro (and that Bluetooth adapter) use a different connector called the Pentaconn Ear, not compatible with the Fidelity+ MMCX connector of the IE 300.

Yes I understand.
Now I've matched my IE400pro with a Fiio M11 and it really is a good combination. Adds detail to the amazing sense of depth these buds have. Curious to hear how they perform with the Bluetooth cable.

 

[corgifall]

Review up for those interested on my take of the IE 300.

https://www.head-fi.org/showcase/sennheiser-ie-300.24893/reviews#review-25609

 

[Struxture]

My IE 300 just came off this morning for both side of the ear pieces.

 

[Evshrug]

My IE 300 just came off this morning for both side of the ear pieces.

Looks like it’s time to contact support and make use of Sennheiser’s 2-year warranty:
http://www.sennheiser.com/service-support