Audio-GD HE-7 (Singularity)

RM 17,599.00
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GST ID: 001461805056

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Item Specification
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  • Brand : Audio-GD
    Model / SKU : HE-7
    Conditions : New

    Product Description

    Audio-GD HE-7 (Singularity)

    Hai Wei
    ** Facebook http://m.me/StarsPickerAudio
    ** WhatsApp https://goo.gl/GsPFak

    HE-7 (Limit Edition, will discontinued since  31th.July.2015)
    Regenerative power supply
    Dedicated Discrete Fully Balanced DAC
    Especial design DSP software for the PCM1704
    Built in 8 Pieces  PCM1704UK, Supports up to 192KHz

    Note: The HE series products only produce by the two best technicians of audio-gd, every unit had through 500 hours burn in and AP SYS-2722 test , limit by the productivity, we are accept the custom order, please ask the lead time while place the order.



     Summarize  Use Manual  Specs  Shipping Cost

            The HE series products had the longest term of design and test  in audio-gd history .  Even though audio-gd had release the regenerative power supply products since 2006, and Mr. Kingwa had publish the article in the magazine explain the technology detail . 
            The HE series products had finished the design in the New Year of 2014 , we were plan to release them in the date of audio-gd 10  anniversary , but for got the best sound quality and performance, we have even 3 times change the full design for made the compare, and compare different power frequency and voltage, create the longest design term record.
           The HE series products have better detail and dynamic reproduce ,blacker backstage ,better focus and larger sound stage , but the sound is better analog .
            The right saddle must is set on the right horse ,if you had not enough good system units, and had not enough cable match experiences, don't waste the money on HE series products.
            Please note the HE series products are upgrade from Master series, even though the price had a big rate increased but the sound quality had not same rate improved.

    Audio-gd products had design and test based on the AP SYS-2722 (The top-drawer professional equipment in world) 

    Built in regenerative power supply 
    Uses four R-core transformers (In total 295W ) and more than 95,000uf audio grade NOVER capacitors are used to ensure ample and smooth power delivery. 
    15 groups discrete class A PSUs power supply for the regenerative drivers and the digital / analog audio signal parts.
    Fully balanced class A Non- feedback ACSS analog design built by discrete analog stages without any OPA or coupling caps in the signal path.
    Especial design DSP software for the PCM1704 for avoid jitter and digital noise 
    Built in 8 Pieces PCM1704UK design working with parallel connect and balance state.
    The SPDIF inputs have applied special interfaces for processing data, allowing the highest sound quality for the different SPDIF inputs.
               IN1: BNC input, up to 24bit / 96KHz support  . (Best for the high grade disc transports connect)
               IN2: AES input,  up to 24bit / 192KHz support . (Best for long distance signal transmit)
               IN3, RCA coaxial input,  up to 24bit / 192KHz support . (Common coaxial input )
               IN4, optical input , up to 24bit / 96KHz support .
               IN5 , RJ45-I2S input ,up to 32bit / 192KHz support  . 
               IN6 , HDMI-I2S input ,up to 32bit / 192KHz support  . 
    3 outputs:   XLR / RCA / ACSS 
    Static storage mode control software for avoid disturb sound quality , the MCU output once control data and save in the perform parts ,then stop output data until users next operation.  

     Please note:
             We are design the HE-7 only put the point on high sound quality reproduce , we have not design the mute design in it as our low end products, because we have consider any mute design cause the sound quality degrade .   If the SPDIF sources ( only with some few  disc player models)  have design the SPDIF  output signal switch on while playback and switch off while  stop, the switch noise will reproduce by the HE-7, the issue is had a click sound while the source switch . 
             Fortunately most sources had not switch the SPDIF output signal and always had output signal while power on .  
             The HE-7 had the no compromise design, it may can't  compatible with all TV, game box, low range disc player, ect.  

    Detail of the Current Conveyor Technology

    What's the regenerative power supply :

                 While audio is life , the Power supply is water , Pure water create the wonderful life ,clean power supply reproduce the beautiful sound .
                 The regenerative power supply like a proprietary electric generator built in the unit. 
                 It can block most disturb from the power line , supply the ultra clean power supply for the audio amps , reproduce the most neutral and analog sound like audio signal for the system and the users.
                 In the regenerative power supply design, the AC power through the regenerative input transformer , conversion to DC power ,through the class A PSUs power supply for the regenerative wave generator and driver stages . 
                 A balance regenerative regular wave generator produce the ultra low distortion 50Hz wave ,through the balance  gain amps and the strong  output stages , drive the regenerative transformers produce the clean AC power supply feed to the separate class A PSUs power supply for the L and R channel preamps .
                The class A parallel connection PSU has very high input impedance to avoid disturb through the PSU from affecting the signal parts and low output impedance with very fast speed and high linear,  it is a very clean power supply.
                 Audio-gd on the regenerative power supply design points  :
                        1, Through analyzed the AP SYS-2722 ,do a lot practises ,test and listen , full analog design of the regular wave generator have much lower distortion than the digital generator.
                        2, Digital drive stages have higher efficiency , but full analog drive stages have much better analog sound like .
                        3, 400Hz regenerative wave have higher efficiency , 50Hz regenerative wave had much far away the human ears sensitivity area than the 400Hz, boost the sound have much better analog sound like.

                  The HE-7 is a real fully balanced discrete design. Applies the 8 Pieces Expensive high-end grade PCM1704UK which can support up to 24Bit/192KHz  through SPDIF input and 32 Bit / 192KHz through  I2S input . Similar to other PCM1704UK designs , we applied Non-feedback ACSS analog stages. The 8 pcs PCM1704UK feed to the ACSS analog stages without any OPAs and couple caps so it can avoid sound coloration .
                  The ACSS is a non-feedback technology made with fully discrete amplifiers. Most people know the global feedback design can offer better specs in test measurements, and classic non-feedback can't do well in test measurements but can offer better sound for the human's ears. Here is a conflict of the classic circuits. But the ACSS opens a new field, it can offer a least coloration sound which is more neutral with very low distortion and high linearity. So it can retain the dynamics, detail and neutral sound but not sound bright or harsh.

    Output buffer:        
        The output buffers are Non-feedback. For low impedance, we applied the dual FET buffer output stage which is quite less colored than most conventional circuits.

    DSP-1 processor:
                HE-7 has built in DSP processor, which is a Two-channel Digital Interpolation Filter and data in-phase processor for digital audio. This Device offers advanced features for high-performance digital signal processing (DSP) applications up to 250-MHz. Data and Master-clock in-phase processing are without jitters. So HE-7 can offer a clear and focused soundstage, apart from accurate and neutral reproduction of the recorded disc/music. The Stopband Attenuation up to -130DB, enough clean the digital noise , avoid the digital noise degrade on the back stage and make the sound like digital.

    Filter Characteristics: 
                 Stopband Attenuation: -130DB.
                 Passband: 0
                 Passband Ripple: within ±0.00001dB.
                             Stopband Attenuation Characteristics(-130dB)                                     Passband Characteristics(-130dB)

    Power supply:
                HE-7 applies the excellent 8 pcs PCM1704UK and excellent analog output stages, but these are not the only keys of the best sound. The power supply is most important. Even applying the best DA chip and the best amp, if matched to a normal power supply, the total sound may still be average or sound musical, but can't be neutral and detailed. That is why it is easy to find hi-end grade gears maybe without the best chips or amp stages, but with plenteous dedicated DC supply circuits. 
                The HE-7 
    had total 21 PSU groups are applied. Uses 19 groups of high-quality class A parallel connection PSU with dedicated DC supply double-stage PSU, which can offer very clear DC power for the DAC, producing a very black background and neutral sound characteristic. The double-stage PSU is very important for digital parts. Some designs may have very low jitter in theory, but if the power is supplied by a dirty or low-speed power supply, it will increase the jitter and pollute the data, and degrade the sound quality obviously.
                 The class A parallel connection PSU has very high input impedance to avoid pulse through the PSU from affecting the DAC and low output impedance with very fast speed and high linearity, so it is a very clean power supply. In my experience, its sound is better than battery power supply, better human sound and neutral.

             HE-7 has complete separation of digital process, analog left, right amplifier channels, regenerative drivers and transformer, even the 230V / 120V power input lines had shield in the copper conduit. 
             HE-7 uses heavyweight all-aluminum  chassis to prevent the eddy current of transformers from interfering on circuit board. 

             Uses all audiophile grade components, including DALE resistors, WIMA caps, custom order NOVER (UK brand) caps, all audiophile grade input & output sockets (Neutrik ) and gold IEC socket.  HE-7 all parts of four channels had exact match before install.

    Static storage mode control software:
             In most control softwares design, the MCU will continuously output data to the perform parts , the MCU had the very high speed, so the output data become high frequency impulses disturb the audio signal circuits make the sound worst . This product had applied static storage mode control software , the MCU output once control data and save in the perform parts while just power on and users operate ,then stop output data until users next operation. This design make the sound quality improve on the clear and transparency .

    Some advices for the unit have the life longer than 100,000 hours :
    1, The HE-7 had built in full analog regenerative power supply, full class A power supplies and signal amps, these designs will produce 25 centigrade higher than the room temperature , we are advice shut down the unit for more than 2 hours after continuously working 10 hours  . The unit only need around 15 minutes for warm up.
    2, Keep its top
     cover , side faces  had least 3 CM space and far  to other heat gears for better heat follow away .
    3, Let it working in the room temperature lower than 30 centigrade . For better sound reproduce, we had applied the R core transformer but the power Consumption is large, so if the power supply over 235V or 125V may cause the transformers had hum.

    Click to review : RJ45 and HDMI pin definitions
    Specifications might subject to change without prior notice for product improvement.
    S/N Ratio

    Output impedance
    10 ohm

    Output Level
    2.5V (RCA)
    5V (XLR)
    2+2MA (ACSS)
    Frequency Response
    20Hz - 20KHz (< - 0.1DB)
    Input Sensitivity

    0.5 Vp-p ( 75 Ohms, Coaxial )
    19 dBm (Optical) 

    Support Sampling  
    BNC mode: 44.1kHz, 48kHz, 88.2kHz, 96kHz 
    and AES mode: 44.1kHz, 48kHz, 88.2kHz, 96kHz ,192kHz 
    Optical mode: 44.1kHz, 48kHz, 88.2kHz, 96kHz  
    I2S mode: 44.1kHz, 48kHz, 88.2kHz, 96kHz ,176.4kHz,192kHz 
    Power Requirement
     Version 1: 100-120V  AC 50/60 Hz
    Version 2:  220-240V  AC 50/60 Hz
    Power Consumption
    Transformers Power
    295W (4 unit transformers)
    Package Weight
    Approximately 19KG

    W430 X L450 X H125 (MM, Fully aluminium ) 
    AC power cord            X1


    Last Updated @ 7/15/2017 3:27:59 PM

      Buy with confidencewe have 908 Good Ratings from buyers !

    BuyerItem IDDateRatings
    ze**** 197277498 5/24/2018 8:09:00 PM Received item as advertised. Delivery was fast. You have to find out suitable program to use on your pc for playlist creation and export.
    su**** 192272629 5/17/2018 4:20:00 PM Fast delivery. Thumbs up!
    dr**** 202015630 5/8/2018 8:37:00 PM -
    bl**** 195704728 5/4/2018 9:47:00 PM -
    bl**** 195656612 5/4/2018 9:45:00 PM -
    lo**** 201449836 4/27/2018 9:33:00 PM Very good and friendly seller with much variety of item! Must visit their shop for superb environment and food.
    dr**** 201776746 4/21/2018 6:10:00 PM -
    ma**** 202370144 4/20/2018 2:19:00 PM Excellent seller.Wide variety of products  Responsive to question.Very fast delivery.Hope you sell aplenty

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    Warranty Period

    1. All products purchased from Stars Picker Enterprise are warranted under different terms and for different warranty periods as offered by the specific manufacturer or distributor.
    2. The warranty period begins to run as of the date when customers receive the product.

      Coverage of the Warranty

      1. The buyer is entitled to claim for warranty for damage to the product in transit, defect in workmanship of the product, delivery of a wrong item of product, or any other damage caused by reasons other than fault of the consumer, and all cost and expenses incurred for the shipment of the product will be borne by us.
      2. The warranty does not cover damage caused by human factors, accident, misuse of the product, unauthorized alternation to or change of parts or components of the product, act of God or problems of power supply.
      3. No warranty is offered for products which have gone beyond the period of warranty. We can arrange to send back the products for repair but any cost incur will be bear by customers.
      4. No warranty is offered if the warranty label on the product is altered or damaged.

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