Design and features:And we repeat - the Fidelio M2L/27 only works with Apple mobile devices that use the Lightning connector and that are using iOS 7.1 or higher; it does not work with any other audio devices. It uses the digital audio output from the Lighting connector and has built in DAC (digital to analog converter) that can handle 24 bit audio with a sampling rates of up to 48kHz to convert the digital audio to analog audio that you can hear. It also has integrated volume, music player function, and call connect/disconnect controls, but it lacks a microphone so the Apple mobile device's own mic must be used during phone calls. This model has earcups that swivel to flat for ease of carrying and storage, and comes with a storage bag.
Sound quality: We found the Fidelio M2L/27 delivers sound quality that falls in the good range - it reproduces music and voice reasonably well despite the obvious shortcomings in its sound. The overall sound can best be summarized as full, bassy, and tending toward muffled. Bass (as in bass drums, bass guitars, stand-up bass, etc.) has good impact and goes deep, but is somewhat prominent and boomy. The midrange (voices, guitars, horns, etc.) is fairly even, but a bit dark (there is an opaqueness that covers up fine detail) and soft. The treble (cymbals, the upper range of violins, etc.) is slightly subdued, and the upper treble is a bit muted. While the sound has a good sense of liveliness it is closed-in -- sound-wise it is obvious that you have something covering your ears.
Comfort: We found that these headphones produce a moderate sense of pressure on the ears. The ear pads might feel hot and/or sticky after prolonged use. When wearing this model while walking the vibrations from each foot step can be heard through the headphones.
