Vacuum Tube Preamp Stereo 4 Vie HiFi Audio Switcher Box Desktop Amplificatore Cuffie US
1 Tube Preamp. Headphone output impedance: 32-300Ω. Headphone max power: 160mW/32Ω. Default Soviet Union 6H3N tube, can be replaced by Beijing 6N3 / Soviet Union 6H3N-E etc. Input sensitivity: 0.775V.