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Quick Details

  • Brand Name: GUSTARD
  • Model Number: A20H
  • Type: Home Amplifier
  • Channels: 2 (2.0)
  • Place of Origin: Guangdong, China (Mainland)
  • USB: With USB
  • Frequency Response: 20Hz-20kHz+/-0.1dB
  • Weight: 6.5kg
  • Size: 330*260*65 mm(w*d*h)
  • THD+N: <0.0005%
  • RCA Output level: 2.0Vrms@0dBFS
  • XLR Output level: 4.0 Vrms @0dBFS
  • Earphone max output powe: 2400mW@32Ω

Packaging & Delivery

Packaging Details Carton box
Delivery Time Shipped in 7 days after payment

GUSTARD A20H Dual AK4497 XMOS USB PCM/DSD DOP DAC Decoder and Class A Full Balanced Amplifier


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1.  Dual AK4497 class A full balance amp,native full balance.

2.  Decoder and amplifier all-in-one ,well proportioned,double power supply design.

3. Clock management ,2nd PLL digital plastic,DOP demodulation/modem,PCM/DSD depop switch and other exclusive technology.

4. All interfaces support DSD decoding,digital broadcasting,USB supports 384K DSD256.


Technical features

1.The latest hi-end AKM AK4497EQ decoding chips, make no interference in L/R channels and purer sound


2.  Clock management ,2 nd PLL digital plastic,DOP demodulation/modem,PCM/DSD depop switch and other exclusive technology.


3.  Using full discrete component large current hi-end full-balanced amplifier,each channel uses two separated amplifier unit to form asymmetric output circuits.


4.  Native full balance architecture, there is no any transition from DA to amp circuits,it is a complete four-way output volume.


5.  Using two customized 50w audio specialized ring transformers to supply power separately to the amp and decoder,so that their power supply has no interference to each other.


6.  Using own-created individual analog LPF cirtuits,the parameters of each level has been carefully adjusted to achieve the best conditions.


7.  The all interfaces support DSD decoding :IIS supports DSD64,DSD128,DSD256,DSD512 decoding; SPDIF,Optical,AES/EBU support DSD64 decoding(DOP mode); USB supports SD64,DSD128,DSD256 decoding.


8.  Rich digital filtering,two kinds of DSD: Wide BW/Narrow BW;six kinds of PCM: Short Delay Sharp / Short Delay Slow / Sharp / Slow / Low-dispersion Short Delay Filter/ Super Slow.


9.  Adjustable screen brightness:it will return to the default brightness after 30s’no-operation;it will automatically remember the current brightness,and the next time you start up, it will keep the last setting.


10.  The USB uses the USBAUDIO specialized U8 chip from XMOS,it can support PCM384, DSD256.


11.  Full aluminum alloy box,two colors(silver and black) are available.






Size:330*260*65 mm(w*d*h)

Size with package:420*360*175 mm(w*d*h)

Weight with package:6.5kg


Frequency response:20Hz-20kHz+/-0.1dB

Output circuit(turning off the pre-amp):RCA output level: 2.0Vrms@0dBFS, XLR output level : 4.0 Vrms @0dBFS

XLR interface:American standard (1 ground wire,2 positive line,3 negative line)

Earphone max output power: 2400mW@32Ω

Load power:

32Ω         2400mW

64Ω         1230mW

150Ω         530mW

300Ω         264mW

600Ω         132mW


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