Source: Macbook 12 with Audioquest DragonFly v1.2   Comfort and Construction:   Overall the comfort level was good to me for an in-ear monitor. The key is to correctly size the inserts. Cord length is good for this type of ear monitor. Ended into a 1/4” plug with a 45 degree angl. For use on an iPhone or iPod, this may be a slight distraction. The cord is sturdy. Seemed to have good thickness without being too thick. There are no controls on the cord. This could be a deal-breaker for some.   Sound:   Overall, the RE-400 has a good sound. The...

The Ziks have a great sound for Bluetooth wireless headphones. They can be wired directly if Bluetooth is not available. They offer a many features, including an innovative capacitive touch-control for volume, active noise-cancellation, and an app for smartphones that acts as a virtual control panel for the headphones. The rechargeable battery is removable and replaceable. Even though they are heavy, they are comfortable. On the outside of the right ear cup there is capacitive touch-panel for controlling music playback and taking calls. Swiping...

My experience with noise-canceling headphones include the Bose QC-15 and the Parrot Ziks.   In comparison, the Sennheiser PXC 450s sound really nice. The sound is clear and revealing. Good bass, but not muddy. They will expose poor quality MP3s. They are very comfortable and can be worn for long periods of time without any discomfort. I think the Bose are slightly more comfortable, but not by much. They are a large headphone set, but they fold up for travel, and they come in a zipper case with a couple of adapters. They seem to be well built. The...