Review on Bose QuietComfort 25/35, QC25/QC35 II Replacement Audio Upgrade Cable - 1.5M (4.9Ft) by Swami Alcaraz

Good quality cable and good feel. However, the 3.5mm head is too thick, preventing it's use in tight circumstances like through a case or on an iPad (where the angled slot for the headphones ends up blocking a solid connection -- resulting in a lot of noise associated with cable movement, the cable falling out, and a general lack of good audio).So you're back to needing a 3.5mm male to female adaptor with a smaller 3.5mm female head in order to get a good connection. Sad that this is necessary on what otherwise is a very nice cable.The 2.5 mm head snugly connects to both Bose QC35 and QC25 headphones (though you lose the phone controls & mike that you have with the Bose QC25's included cable).When the connector can get a solid connection (on my computer, and on my iPhone via the lightening adapter) the sound quality is great.