Seasonal Pick Topping D50s Usb Dac Decoder+ Topping A50s Headphone Amplifier Eco-friendly [xsSFrT3b]

D50s Features:

Device attributes:
Measured:11.9cm x 11cm x 2.6cm
Weight:510g
Power input:DC5V/1A
Colour:Full black/Full silver
Input:USB/OPT/COAX/BT
Line Out output:RCA

Parameters:
D50s Output: DAC( LineOut COAX 96K Input)
THD+N @A-weighting<0.0003%@1kHz
<0.0004%@10-20kHz
SNR @A-weighting>122dB@ 1kHz
Frequency Response:20Hz-20kHz(+0.1dB)
Output Level:2Vrms OdBFS
Noise:<2uVrms
Channel Crosstalk:-130dB @1kHz
Channel Balance:0.025dB

Spec:
USB IN:44.1kHz-768kHz/16bit-32bit,
DSD64-DSD512(Native),
DSD64-DSD256(Dop)
OPT/ COAX IN:44.1kHz-192kHz/16bit-24bit, DSD64(Dop)
BT IN:AAC/SBC/APTX/APTX LL/APTX HD/LDAC

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A50S Features:

Ultra-High Performance
A50s uses the same NFCA (Nested Feedback Composite Amplifier) module? from flagship A90. Voltage Current hybrid feedback architecture along with? UHGF (Ultra High Gain Feedback) technology provides excellent DC and AC performance. High output current drive capability allows the amp driving low impedance headphones with ease. Ultra-low noise of 0.3uV is miles ahead of? the competition, giving an absurdly high dynamic range of 144dB and no audible noise and darkest background for the most sensitive IEMs.

6.35mm SE &?4.4mm balanced output
Although there is only a single-ended input, A50s has a built-in balanced amp circuit. Therefore, it can drive single-ended headphones by 6.35mm output, and drive balanced headphones by 4.4mm balanced output.

An excellent preamp
The NFCA modules of A50s are not only able to drive the headphones but also apply to be a preamplifier with the same?ultra-high performance. When it is in preamp mode, output impedance is as low as 20ohm, which is widely suitable for various?devices.