Topping A50s Hifi Headphone Amplifier 6.35mm/4.4mm

Specifications:

THD+N @A-wt:

6. 35mm Headphone Output：

<0.00007% @1 kHz; Output=850mW(32Ω)

<0.0004% @20-20kHz; Output=720mW(32Ω)

<0.00006% @1 kHz; Output=90mW(300Ω)

<0.0002% @20-20kHz; Output=77mW(300Ω)

4.4mm BAL Headphone

<0.0007% @1 kHz; Output=3.4mW(32Ω)

<0.001% @20-20kHz; Output=2.88mW(32Ω)

<0.00006% @1 kHz; Output=367mW(300Ω)

<0.0005% @20-20kHz; Output=307mW(300Ω)


SNR @A-wt: 137dB@1kHz (6.35mm), 143dB@1kHz (4.4mm)

Dynamic Range @A-wt: 138dB@1kHz(6.35mm),144dB@1kHz (4.4mm)

Frequency Response: 20Hz-200kHz(±0.05dB); 20Hz-200kHz(±0.05dB)

Output Level:

6.35mm Headphone jack: 21Vpp

4.4mm BAL Headphone jack: 42Vpp

AP measured noise level@A-wt:
6.35mm Headphone jack: <0.7uVrms @G=L; <0.8uVrms @G=H
4.4mm BAL Headphone jack: <0.9uVrms @G=L; <1.1uVrms @G=H

Actual noise level@A-wt:
6.35mm Headphone jack: <0.3uVrms @G=L; <0.6uVrms @G=H
4.4mm BAL Headphone jack: <0.45uVrms @G=L; <0.95uVrms @G=H

Channel Crosstalk@1kHz: -86dB(6.35mm), -128dB(4.4mm)
IMD CCIF@(18kHz+19kHz):-116dB(6.35mm),-116dB(4.4mm)

IMD SMPTE@(60Hz+7kHz):

6.35mm/4.4mm: -110dB(SMPTE4:1), -118dB(SMPTE1:1)

Output Impedance:

6. 35mm Headphone jack: <0.1Ω

4.4mm BAL Headphone jack: <0.2Ω

Output Power(THD+N<1%):
6. 35mm Headphone jack:
1.4Wx2@32Ω; 192mWx2@300Ω

4.4mm BAL Headphone jack:
3.5Wx2@32Ω; 760mWx2@300Ω

Output Power(2Vrms In):
6. 35mm Headphone jack:
485mWx2@32Ω; 52mWx2@300Ω

4.4mm BAL Headphone jack:
1950Wx2@32Ω; 208mWx2@300Ω

Load Impedance: >8ohm(6.35mm&4.4mm)

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