Hifi man he r10d are closed back headphones designed for a natural and detailed audio performance'. '.strtoupper('i')t uses a hifi mans topology diaphragm design with 50mm dynamic drivers to deliver a sound not found in most true wireless headphones'. '.strtoupper('h')eadphone cup build the he r10 dynamic headphone cups are made from cnc woodcarving and aviation aluminium, which has a large internal space to provide sufficient volume and lsquobreathing room to the powerful drivers'. '.strtoupper('5')0mm dynamic driver the hifi man he r10 dynamic headphones have a 50mm dynamic driver that has a high sensitivity due to the use of a rare earth magnet'. '.strtoupper('t')his is combined with hifi mans topology diaphragm design, which is a diaphragm that features a special nanoparticle coating applied to its surface'. '.strtoupper('t')his provides a natural and detailed sound, with high frequency response up to 30khz leather wrapped box hifi mans he r10d come in a box with a small hardback owner's guide that includes photography, history and important information on the headphones'. '.strtoupper('i')t also comes with detachable cables.