title: Topping A50s Preamplifier NFCA Fantasy HPA for Desktop HiFi 4.4mm Balanced Output Headphone Amplifier (Black)
full: Topping A50s Preamplifier NFCA Fantasy HPA for Desktop HiFi 4.4mm Balanced Output Headphone Amplifier (Black)
  ['A50s Headphone Amplifier specifications  6.35mm headphone jack  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  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']
  ['6.35mm SE & 4.4mm balanced output ---Although there is only a single-ended input, A50s has a bilt-in balanced amp circuit. Therefore, it can drive single-ended head- phones by 6.35mm output, and drive balanced headphones by 4.4mm balanced output.', 'Wide range of adaptation to headphones ---A50s has a high voltage swing of 42Vp-p, power of 3500mW per channel when both channels are driven and output impedance of less than 0. 1Ohm. It easily drives power-hungry headphones with a wide range of different impedance.', '2 step gain settings, adapt to various sensitivities ---A50s is equipped with two gain settings of 0dB/6dB at SE out- put(6dB/12dB at balanced output). Wide range of gain settings and the 0.3uVrms ultra-low noise makes A50s easily adapt to all types of headphones from extremely sensitive IEMs to most power demanding full-sized over-ears.', 'P50 could provide cleaner power to A50s ---(When powered by P50, max balanced output power of A50s drop to 2 4W x 2, other power spec is not affected)', 'HPA/PRE automatic switching--- When the A50s is not connected to any headphones, it automati- cally works in the preaplifier mode, and the amplified signal is output from the RCA on the back panel. When the headphone is connected to 6. 35mm or 4.4mm output, A50s automatically switches to the headphone amp mode, and the signal is only output to the 6.35mm and 4.4mm jack.']
  {"Product Dimensions": "4.84 x 4.33 x 1.02 inches", "Item Weight": "1.98 pounds", "Manufacturer": "", "Is Discontinued By Manufacturer": "No", "Date First Available": "December 13, 2016", "Platform": "PlayStation 4", "Connector Type": "RCA", "Brand": "Fanmusic", "Connectivity Technology": "RCA", "Color": "Black"}