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Yulong DAC

post #1 of 152
Thread Starter 
Any users for the DAC? Yulong DAC with AD1955.....





http://www.erji.net/read.php?tid=476457

This DAC are specially designed by YULONG audio engineers. The concept is towards an user-friendly integrated DAC Amplifier, which only require a personal computer. This DAC Amplifier is capable of driving your headphone/preamp or speaker to achieve audiophile quality sound. Despite of its competitive pricing, it doesn’t compromise in any aspect of sound reproduction thus you can spare for other tweaks/gadgets in audio device/sources/preamp/interconnect cable. In terms of price per performance ratio, currently this DAC amplifier has the best bang for bucks.

•This DAC Amplifier will benefit greatly from high quality interconnect cable, power cord and other tweaks.

•Each unit comes with a exclusive portable remote controller.

•The heart of this DAC Amplifier lies in the main processing DAC chip which is AD1955. AD1955 is widely known for its excellent sound performance and benchmark for other high-end DAC on the market. The circuit topology used is a combination of DA1955 DAC and HEF188 headphone amp which controlled by CPU. There are no reduction in components nor quality of components used in original DA1955 and HEF188 circuit. In order to obtain the optimum performance, PCB routing is redesigned in more compact manner. Based from the customer feedbacks of DA1955 and HEF188 and our professional experiences in product design, we managed to fine tune the circuit topology to achieve optimum performance.

•With built-in MCU and the flagship Digital Volume Controller (CS3310) from Cirrus Logic, multiple standard Input/Output ports are available to provide flexibility for the user. For input, SPDIF, Coaxial, USB, analog input (RCA) are provided while headphone output, DAC output, and circuit output are for output part. This product is a multi function product which provides multiple modes for user convenience as well.

Available modes:
1. DAC + headphone amplifier: Switch on the power, press MODE button from the front panel to choose various input signal(SPDIF,Coaxial,USB), adjust the volume, plug in headphone to PHONE and start to enjoy the music.

2. DAC: Switch on the power, press MODE button to select preferable input signal mode, signal out from the DACOUT.

3. Headphone amplifier: Switch on the power, use MODE button to select PCM LINE status, adjust volume, connect headphone to PHONE.

4. DAC + Preamp : Switch on the power, press MODE button to select input signal, signal out from the LINEOUT.

•DAH01 Stereo DAC sound characteristic: great dynamic, wide and deep soundstage, excellent instrumental separation, sweet and natural sounding. This DAC’s headphone amp has a high output power which capable of driving all range of headphones ranging from low impedance to high impedance. The DAC’s preamp output has low output impedance, which ease for pairing it with any speaker amplifier on the market.

•Attention: Please adjust the volume, wave to 50% out of maximum value to prevent distortion in the sound and degradation in overall performance


•DAH01 technical specification
•Standard input connector: SPDIF, Coaxial, USB, analog input (RCA)
•Input Frequency: 44.1,48,96,192KHZ/16/24BIT auto-recognized
•SNR: >115db
•Dynamic Range: 110db
•THD+N: 1KHZ%0.0008
•Frequency response: 20-20KHz-0.1db
•DAC power:<20W
•Headphone’s out power: 300R/200mw
•Dimensions: 180*250*55mm
•Weight: 2kg
post #2 of 152
Interesting!
Why is it limited to 20 KHz?
Is that a common feature for DACs?
post #3 of 152
What are they doing with the analog inputs? A-D for DAC filtering or is it analog passthrough?
post #4 of 152
I think they're inputs so you can use it as a standalone headphone amp
post #5 of 152
Quote:
Originally Posted by udo View Post
Interesting!
Why is it limited to 20 KHz?
Is that a common feature for DACs?
Whats being said there is that the frequency response is +0.1 dB from 20Hz - 20 KHz. It's simply the range that was tested.

Does anyone have a price or place to buy this thing?
post #6 of 152
Thread Starter 
It's about USD 250 !!
post #7 of 152
post #8 of 152
It seems it is available worldwide from ebay (search for "yulong dah1" and several matchings will appear).

Does anybody knows how this this compares against other chinese dacs+headamps such as Zero or Zhaolu?

If used only as a headamp, how it compares against dedicated SS amps such as little dot MKV?
post #9 of 152
Finally available with worlwide shipping:

YULONG DAH1 DAC/ Headphone Amplifier - (eBay item 180199247748 end time Jan-03-08 18:55:15 PST)

Of course with a higher international then China price

I am still extremely tempted!
post #10 of 152
very tempting....... must resist...
post #11 of 152
It's headphone amp section HEF188, said to be a clone of Lehmann Black Cube Linear.
post #12 of 152
I am getting one of these, looking at the HEF188 i also hold the same suspicion abt it being a clone of the lehmann black cube, but i have never heard the lehmann before.
post #13 of 152
Quote:
Originally Posted by Cankin View Post
It's headphone amp section HEF188, said to be a clone of Lehmann Black Cube Linear.
Quote:
Originally Posted by zer061zer0 View Post
I am getting one of these, looking at the HEF188 i also hold the same suspicion abt it being a clone of the lehmann black cube, but i have never heard the lehmann before.
it is. just one look under the hood of both gives it away, the HEF188 is identical minus the pre-amp section and gain switches at the bottom.
post #14 of 152
Quote:
Originally Posted by d-cee View Post
it is. just one look under the hood of both gives it away, the HEF188 is identical minus the pre-amp section and gain switches at the bottom.
That's the problem with a lot of the DACs coming out of China these days. One look at the PCB and you get the instant feeling that you have seen it before under a different brand name. It's like many other products coming from China, where factories copy each other, rather than innovate. Where has sound quality gone heh?

At least one good thing is that if it is in the Zhaolu etc type league, then the cheaper TC-7510 is still the class leader in terms of audio performance capability, and the one all these Chinese clones got to match up to price and performance wise.
post #15 of 152
.
Well, Paid for one on eBay this evening (late holiday present to myself), will let you all know my take on it when it arrives in the new year!

Andrew D.
Canadian Audio Video



PS: (If) this unit does in fact sport a Lehmann Audio Black Cube Linear Headphone Amplifier - that would be one hell of a deal! That particular unit sold for nearly $800.00! Check out this old (2005) link to a review of it:

SoundStage! Equipment Review - Lehmann Audio Black Cube Linear Headphone Amplifier (2/2005)

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