The hifiman shangri la sr electrostatic over ear headphones the hifiman shangri la sr electrostatic over ear headphones are open back headphones designed to deliver detailed reproduction of dynamics and frequencies'. '.strtoupper('w')hen driven by the shangri la sr headphone amplifier the headphones yield a 7 hz to 120 khz frequency response via low distortion nanotech drivers'. '.strtoupper('a')coustically transparent mesh grating and nanometer thick dust covers protect the diaphragms without compromising sonic integrity'. '.strtoupper('t')he combination of lightweight aluminium alloy construction, padded earcups, and a hybrid headband design ensures comfortable wearing even for extended periods of time'. '.strtoupper('t')he 6.6prime attached cable is terminated with a 5 pin headphone connector, which allows direct hookup to a compatible electrostatic headphone amplifier'. '.strtoupper('s')hangri las nanotech driver couples near zero distortion with a lightning fast response'. '.strtoupper('i')ts nano particle coated diaphragm provides an extremely high frequency response'. '.strtoupper('h')ifiman shangri la sr electrostatic headphone amplifier hifi man shangri la sr electrostatic headphone amplifier is designed to drive and complement the matching headphones of the same name'. '.strtoupper('i')ncorporating four of hifiman's custom designed and built 300b tubes as the warm pulse of the shangri la'. '.strtoupper('t')he 300b tubes function as the direct driving force with no capacitors or transformers between the tubes and your headphones'. '.strtoupper('t')he enclosure is constructed of an aviation grade aluminium alloy and topped with a contrasting tempered glass panelmdashis adorned with four 6sn7 vacuum tubes and four custom made 300b tubes, which deliver warmth in tonality and consistent output power for the matched headphones'. '.strtoupper('e')ntire musical spectrum the distinguishable design of the shangri la's relay based attenuator has a volume control consisting of 24 step level and featuring a total of 23 discrete resistors'. '.strtoupper('e')ach volume stage is unique and independent'. '.strtoupper('t')he result is a pure and heavenly audio reproduction of your music'. '.strtoupper('c')onnections a switch on the rear panel enables effortless selection of either stereo input balanced xlr 3 pin or unbalanced rca coaxial'. '.strtoupper('t')he chosen input is served through the internal circuitry and externally mounted tubes to the dual 5 pin female headphone outputs, permitting the simultaneous linking of two pairs of shangri la sr headphones.