Topping A50s - Desktop 4.4mm Balanced

TOPPING A50s HIFI Desktop Headphone Amplifier 6.35mm headphone jack specifications THD+N @1kHz A-wt : <0.00007% @Output=850mW(32Ω)/ <0.00006% @Output=90mW(300Ω) THD @20-20kHz 90kBW :<0.0004% @Output=720mW(32Ω) / <0.0002% @Output= 77mW(300Ω) SNR @MAX OUT 1kHz A-wt : 137dB Dynamic Range @ 1kHz A-wt : 138dB Frequency Response : 20Hz-200kHz(+0.05dB) Output Level: 21Vpp AP measured noise level @A-wt : <0.7uVrms @G=L/ <0. 8uVrms @G=H Actual noise level* @A-wt : <0.3uVrms @G=L/ <0.45uVrms @G=H Channel Crosstalk @1kHz: -86dB IMD CCIF@(18kHz + 19kHz) : -116dB IMD SMPTE @(60Hz + 7kHz) : -110dB， SMPTE4: 1 / -118dB， SMPTE1: 1 Input Sensitivity : 7.5Vrms @G=OdB / 3.8Vrms @G=6dB Gain: 0.0dB@G=0dB 6.0dB@G=6dB Output Impedance: <0.1Ω Output Power THD+N<1 % : 1.4Wx2@32Ω / 192mW x 2@300Ω Output Power @2Vrms IN : 485mW x 2 @32Ω / 52mW x 2 @300Ω Load Impedance : > 8Ω 4.4mm balanced headphone jack specifications THD+N @1kHz A-wt : <0.00007% @Output=3.4W(32Ω)/ <0.00006% @Output=367mW(300Ω) THD @20-20kHz 90kBW : <0.001% @Output=2.88W(32Ω)/ <0.0005% @Output=307mW(300Ω) SNR @MAX OUT 1kHz A-wt : 143dB Dynamic Range @ 1kHz A-wt : 144dB Frequency Response : 20Hz-200kHz(+0.05dB) Output Level: 42Vpp AP measured noise level @A-wt : <0. 9uVrms @G=L/ <1.1uVrms @G=H Actual noise level* @A-wt : <0.6uVrms @G=L / <0.95uVrms @G=H Channel Crosstalk @1kHz: -128dB IMD CCIF@(18kHz + 19kHz) : -116dB IMD SMPTE @(60Hz + 7kHz) : -110dB， SMPTE4: 1 / -118dB， SMPTE1: 1 Input Sensitivity : 7.5Vrms @G=0dB / 3.8Vrms @G=6dB Gain: 6.0dB@G=0dB 12.0dB@G=6dB Output Impedance: <0.2Ω Output Power THD+N<1 % : 3.5Wx2@32Ω 760mW x 2@300Ω Output Power @2Vrms IN : 1950mW x 2 @32Ω / 208mW x 2 @300Ω Load Impedance : > 8Ω Pakaging list 1 × A50s 1 × 15V DC adapter 1 × 6.35mm to 3.5mm adapter 1 × User manual 1 × Warranty card