Delivers a balanced 93dB of sound</br>Ortho dynamic (aka planar magnetic) drivers</br>Extremely comfortable oversized design</br>Products purchased from unauthorized dealers (including those on the Amazon third-party marketplace) will not be covered under the manufacturer's warranty</br></br>Product Description</br></br>Planar Magnetic Headphone Created by the innovator of the planar magnetic technology, the HiFiMan HE400i is a high quality, full-size planer magnetic head-phone created for critical listening at home or in studio. The new generation headphone becomes more lightweight with largely improved sensitivity. Planers vs. Electrostatic planer magnetic and electrostatic drivers are similar in regards to low distortion and high signal input. Compared to the electrostatic driver, the planar magnetic technology uses a more massive diaphragm that is able to move very quickly in a coherent and uniform way. The planer magnetic headphone gives excellent transient response and a sound quality almost equal to that of an electrostatic product. Breakthrough Innovation Single-ended planar magnetic driver provides superior soundstage and spatial imaging. Lightweight-Comfortable The HE400i is 30% lighter than other full-size planar magnetic designs for increased comfort. Lively-Agile Using single-ended drivers, HE400i delivers a Lively soundstage and spatial imaging. Increased efficiency of 93dB allows it to be driven with a modest size amplifier or can even be used with a portable audio player or smartphone. The Look ABS polymer ear cups in a gloss charcoal finish give the HE400i a striking contemporary look Improved pressure pattern is designed to provide best-in-class comfort</br><br/>http://www.amazon.com/gp/product/B00MULH672