GUSTARD A20H HIFI DAC/Headphone Amplifier/Double AK4497EQ/XMOS DSD256 384Khz

SKU: G-A20H
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Price: US$849.98
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  • Double and AK4497 class a balance all ears Native full balance.
  • Decoding put 5:5 ratio not dine Double power supply design.
  • The clock management,2nd PLL digital plastic,DOP demodulation.
  • All interface support DSD decoding support for broadcast DOP decoding.

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Details

Chinese manual:http://pan.baidu.com/s/1dFojC1V

English manual:http://pan.baidu.com/s/1c2qn6Oo

Windows XP/Vista/7/8/10 Driver:
 V3.34.0 Version:http://pan.baidu.com/s/1eR731iM

Mac OS X 10.6.4 and above don't need to install the driver

 

 
 
• The latest top-level decoding chip AKM AK4497EQ x2,left/right channel independent, isolated interference,the sound is more pure;
• CPLD programmable logic chip,the logic of its own construction of digital integrated circuits,clock management,2nd PLL digital shaping,DOP demodulation,PCM/DSD depop switch exclusive technology.For excellent sound quality and laid a solid foundation;
• Full Discrete Component High Current Pure Class A balanced headphone amplifier,each channel uses two independent amplification units to form a symmetrical output line,single-ended and balanced output at the same time,providing an excellent listening platform for the majority of headphone lovers;
• Native fully balanced architecture,from DA to the amplifier circuit,without any conversion,the full four-way output volume;
• DAC and headphone amplifiers each use a custom 50W audio dedicated toroidal transformer,fully independent power supply.
• Analog LPF circuit using independent development of discrete lines,carefully adjust the parameters of each level,until the best working condition;
• High/low selectable gain in preamp mode.Supports 60 analog lossless volume adjustment.Remote control with the post-amplifier,active speaker;can also turn off the pre-function,DA line straight out.RCA single-ended and XLR balanced output at the same time;
• A20H use Native full-balanced design,from decoding to volume control,including the amp section are fully balanced design.
• Full interface support DSD hardware decode:IIS supports DSD64,DSD128,DSD256,DSD512;

SPDIF,Optical,AES/EBU support DSD64(DOP mode);

USB support DSD64,DSD128,DSD256;
• Digital filtering,DSD provides Wide BW/Narrow BW;PCM provides Short Delay Shar /Short Delay Slow/Sharp/Slow/Low-
• XOMS U8,Support PCM384/DSD256;
• Adjustable screen brightness.If no operation after 30 seconds to restore the default brightness;
• All-aluminum chassis.
• DAC Size: 330(L)* 260(W)* (H) 65MM (without protruding parts);
• Package size: 420 (L) * 360 (W) * 175MM (H);
• With packaging weight: 6.5KG;
• International voltage AC100V-240V;
• Frequency response: 20Hz-20kHz +/- 0.1dB
• Line Output (off-stage): RCA Output Level: 2.0Vrms @ 0dBFS, XLR Output Level: 4.0 Vrms @ 0dBFS
• XLR interface definition: US standard
• Headphone AMP maximum output power:2400mW @ 32Ω
 
Load power:

32Ω  2400mW

64Ω  1230mW

150Ω  530 mW

300Ω 264 mW

600Ω 132 mW


Rigorous design,rational layout,clean workmanship,excellent materials






Analog LPF circuit using Fully discrete circuit  Class-A line.
Fully discrete circuit  Class-A work flexibility. It is free to adjust the parameters of each level.
Technical experience and long debugging process, to achieve the best working condition.


AK4118 receive demodulation - sent to the CPLD for processing;
CPLD programmable logic chip, self-built logic functions of digital integrated circuits, clock management, 2nd PLL digital shaping, DOP demodulation, PCM / DSD depop switch and other exclusive technology;


Fully discrete circuit High Current Pure Class-A Balanced Headphone Amplifier.
Professional team design.
The input stage adopts audio special low-noise tube, full-DC amplification, carefully debug each level work in the best working condition.
The final stage use 4xMedium power tube, Big Output Power, most of the headset to play the best results;


2X50W custom toroidal transformer.Completely independent power supply, do not interfere with each other.For high-quality sound to provide better power supply environment and power;


Multistage filtering and voltage regulation.,To ensure clean and stable power supply;


Relay array,60 files simulation of lossless volume adjustment;


XOMS U8 USB Professional SOUND CARD:
XMOS USB using the latest and highest-level U8 (8 core) USB AUDIO scheme,
PCM highest support 32Bit 384K,
DSD Support DSD64 (2.8224MHz), DSD128 (5.6448MHz), with leading system compatibility:
Compatible includes 32/64-bit Microsoft Windows XP, WindowsVista, Windows7, Windows8, Windows 8.1, Windows 10 and other mainstream Windows systems, supports Apple MacOSsystems, Linux kernel support system, and is compatible with partial support OTGfunction of iOSAndroid smart devices .
USA ACCUSILICON femtosecond crystal;


Full interface supports DSD.
IIS supports DSD64, DSD128, DSD256, DSD512;
USB support DSD64, DSD128, DSD256;
Coaxial / fiber / AES / EBU support DSD64 (DOP mode);
 
 
Frequency response


THD+N



SNR


Headphone amplifier 2-channel each connected 32Ω load,Output power at 2400mW: distortion and waveform.


I2S Pin definition



Customer Questions & Answers

Eustace
Eustace

GUSTARD A20H HIFI DAC/Headphone Amplifier/Double AK4497EQ/XMOS DSD256 384Khz. This unit is not a amplifier but the amplifier is only in the headsphone right.

10/20/16 11:11 AM Asked.
shenzhenaudio.com
shenzhenaudio.com

Hi Eustace,    Thank you for your email.  Actually,it also can connect with speaker .  Please contact if any question.    Best regards  Kerwin  Shenzhenaudio

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Steve
Steve

Hi is there a Gustard x20u Pro coming out soon?

10/21/16 12:08 PM Asked.
shenzhenaudio.com
shenzhenaudio.com

Hi Steven.    Yes,in will come out end of November.    Best regards  Kerwin  Shenzhenaudio

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HAE
HAE

Hi, What is IIS? What type of connection can be used to feed data in IIS "format?" to get DSD 512?

10/29/16 5:05 AM Asked.
shenzhenaudio.com
shenzhenaudio.com

Hi HAE,IIS is a kind of input.IIS support DSD512.Thank you.

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thomas
thomas

hi  can you give us more info about the amp : power out singel and balanced  gain etc...  thx  thomas

11/21/16 11:29 AM Asked.
shenzhenaudio.com
shenzhenaudio.com

Hi Thomas,    Line Output (off-stage): RCA Output Level: 2.0Vrms @ 0dBFS, XLR Output Level: 4.0 Vrms @ 0dBFS  Headphone AMP maximum output power:2400mW @ 32Ω  Native fully balanced architecture,from DA to the amplifier circuit,without any conversion,the full four-way output volume;  High/low selectable gain in preamp mode.Supports 60 analog lossless volume adjustment.Remote control with the post-amplifier,active speaker;can also turn off the pre-function,DA line straight out.RCA single-ended and XLR balanced output at the same time;  A20H use Native full-balanced design,from decoding to volume control,including the amp section are fully balanced design.    Thank you

Was this question helpful to you?  Yes   No
Daniel Wang
Daniel Wang

Hello, I'm in the US. What is the warranty and return policy on the A20H?

11/24/16 9:05 AM Asked.
shenzhenaudio.com
shenzhenaudio.com

Hi Daniel,Good day.It have 1 year warranty.And you can ship back to us,we will pay the shipping fee.Thank you.

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asaifa
asaifa

Hi, is it possible to change the volume coming out of the pre (throught the XLRs at the back) at the digital level, or is it always analogue volume control?

11/26/16 3:42 AM Asked.
shenzhenaudio.com
shenzhenaudio.com

Hi Asaifa,yes,you can to open before the level pattern, always simulated volume.Thank you.

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