Below are all the review posts covering the Logitech UE 6000 headphones.

Part 1 – https://gavinsgadgets.com/2013/12/04/logitech-ue-6000-headphones-first-impressions/

Part 2 – https://gavinsgadgets.com/2013/12/05/logitech-ultimate-ears-6000-review-impressions-part-2/

Part 3 – https://gavinsgadgets.com/2013/12/08/logitech-ue-6000-headphones-final-review/