The HIFIMAN Shangri-La Jr System includes headphones & amp. Aluminum alloy construction & four vacuum tubes drive the headphones w/ a wide frequency response & low distortion. Inputs for connection to a variety of sources incl. XLR & RCA. Headphones offer Nanotech drivers & a 7 Hz - 120 kHz frequency response. Acoustically transparent mesh grating & nanometer-thick dust cover protect diaphragms. Lightweight aluminum, padded earcups, hybrid headband for comfort. Amp incl. hand-matched 6SN7 vacuum tubes & 24-step attenuator w/12 LED display. Durable aluminum alloy & tempered glass top panel.