Sennheiser CXC 700 In-ear Active Noise-Cancelling Headphone Review$229.95
Bose QuietComfort 15 Comparison
Despite the inherent differences in design between on-ears and in-ears, the first impression we have is that not only are the Bose cans more durable, but they seem to have a slightly higher focus on aesthetics. That being said, the QuietComfort 15s are not some shining example of durability either, so take that as you will.
Hands-down, the Sennheiser CXC 700 has a less erratic frequency response, staying within our ideal limits for a greater range of frequencies.
The Sennheiser CXC 700s also have a far lower total SPL of distortion too, which will be important to those who are sticklers for audio quality.
The QuietComfort 15s have a more erratic tracking response as well, giving us some rather bizarre shifts in channel preference in the mid to high end.
Both headphones are outstanding isolators, but the Bose cans seem to be able to attenuate more of the low end with their active cancelling circuit.
On-ears are almost universally more comfortable to wear than in-ears, but it is totally possible for users to prefer in-ears to on-ears. Give each a try before plunking down $200+ for either.
If you're looking for something to take on an airplane with you, we'd suggest the Bose cans over the Sennheiser CXC 700. Not only are they a bit more durable, but they also block out a lot of that low-end noise that can become a huge bother. If you can find as good deal on the QuietComfort 15s, you might want to pick them up over the Sennheiser CXC 700s.