HIFIMAN Closed-Back Headphones I used these for mixing. As a characteristic of planar magnetic headphones, the diaphragm is thin and large, making it easy to express fine sound details. Other advantages include: * Planar magnetic drivers have low distortion because the entire diaphragm is driven uniformly. * The lightweight and rigid diaphragm accurately reproduces attack sounds and transients. I immediately noticed the benefits of these features. Disadvantages include the high price and the fact that many models have low impedance and sensitivity, often requiring a high-power headphone amplifier. However, my setup had relatively good conditions, so these were very good headphones. I owned both open-back and closed-back models, and both had their merits (naturally, the tendencies are the same). I've decided to sell them now that I have other options. There are no problems other than a small scratch on a part of the wooden ear pad. All accessories are included. There are no pet or tobacco smells. I will ship from Kanagawa Prefecture with the buyer paying for shipping.