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Audio-GD Master-2H | Master 2H Real Balanced ACSS Mono Power Amp

    Audio-GD Master-2H | Master 2H Real Balanced ACSS Mono Power Amp

    RM 18,489.00

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    Since 08 Mar 2013
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    Delivery From Petaling Jaya / Selangor
    Estimated Arrival :
    7-10 working days.
    First unit : RM 70.00 
    Shipping Fee
    RM 70 by courier to Peninsular Malaysia
    RM 700 by courier to Sabah, Labuan
    RM 700 by courier to Sarawak
    Ship To : Within Malaysia
    Full Refund if you don't receive your order*
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    More than 24H
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    Popular Products
    Product ID 205598509
    Brand Audio-GD
    Model / SKU Master-2H
    Conditions New


    Audio-GD Master-2H | Master 2H Real Balanced ACSS Mono Power Amp

    Audio-GD Master-2H | Master 2H Real Balanced ACSS Mono Power Amp


    Audio-GD Master-2H | Master 2H Real Balanced ACSS Mono Power Amp

    KINDLY PM FOR LATEST STOCK AVAILABILITY BEFORE MAKING PAYMENT
     
    Hai Wei
     
    ** Facebook http://m.me/StarsPickerAudio
     
    ** WhatsApp https://goo.gl/GsPFak

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


    What's new in the Master 2H:
    The Master 2H applied the newest output drive stage design, which is same as the HE-2 . The Master 2H had assemble 80 pcs ON Semiconductor transistors, larger power transformers and the caps, boost the drive ability achieve the monster level . The newest output drive stage design had the ultra low distortion , low to -120DB even with the normal listen volume , keep the sound quality had more transparency, clean, less coloration and dynamic .


    Fully balanced design, the gain stages and pre-driver stages work in class A and are built with discrete analog stages without any OPA or coupling caps in the signal channels.
    The output transistors stages work in high idle current state . The Diamond Cross output stage design avoids "switch distortion" as good as class A amps.
    Non- feedback ACSS analog amps.
    2 group analog inputs: XLR / ACSS
    Applies 80 pcs ON Semiconductor transistors. Supports 250W X2 (8 Ohms) output.
    The capacitance of the whole machine reaches as high as 260,000 uF, Two 800W (Total 6000W) core transformers and two R core transformers , Separate power supplies for the right and left channels.
    A total of 4 groups of high-quality class A parallel connection PSU's supply the gain stages.
    Applies all audiophile grade components, including DALE resistors, WIMA caps, custom order NOVER (UK brand) caps, all audiophile grade input & output sockets and gold IEC socket. Applies the round-corner style chassis which has lower syntony, or vibration. Between the transformers and signal amps resides a thick metal board to avoid disturbance.


     


    Core:
    Master-2H is a true balanced design applying the newest ACSS design which can improved the XLR connection to sound as good as the ACSS connection. It seems complex , but in fact they are the most simple design the world has ever had , their a lot components to process the power supply.
    The Master-2H power amp only has a single " voltage" gain stage to process signals, but works in ACSS mode so in fact it is a current gain stage instead of voltage gain stage, whereas normal OPA chips already include two or three voltage gain stages. The simplest and shortest signal journey brings out the most neutral and least colored sound.
    Master-2H applies ultra-low distortion single stage ACSS amplifier and soldered directly on the motherboard . The gain stages and pre-driver stages working on class A .
    The output transistors stages working on high idle current state . The diamond cross output stage design can avoid "switch distortion" as good as the class A amp .

    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 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.
    All signal gain is in current, achieved by the unique, superb open-loop multiple output current mirror. Incomparably precise and ultra-low distortion in the gain signal is the result. The signal path is balanced throughout and all transistors work in class A mode.
    The ACSS parts use 4 groups of high-quality class A parallel connection PSU for dedicated DC supply. The class A parallel connection PSU has very high input impedance to avoid pulse from the PSU from affecting the gain stages, and low output impedance with very fast speed and high linear, so it is a very clean power supply.

    Drives:
    Massive use of high power parts and robust power supply guarantee vigorous current output that drives most existing loudspeakers.
    Master-2H applies four channels of diamond non-feedback output stages composed of 80 pcs ON Semiconductor transistors. The capacitance of the whole machine reaches as high as 260,000uF. Four transformers are used with total power of 1700W.

    Input:
    Master-2H can input not only XLR balanced signal, but also the top grade ACSS current signal. No matter what kind of signal it is input, it is able to transfer it to current signal and amplify it.

    Shield:
    Master-2H uses heavyweight all aluminum alloy chassis to prevent the eddy current of transformers from interfering with the circuit board. The interior is separated into 3 sections with aluminum boards for the best separation off the ACSS parts, the output stages and transformers. The AC power wire is shielded by a copper channel from back to front.
    Master-2H take care the vibration for the best sound playback. Each channels gain parts under a 5MM thick aluminum board, these aluminum board not only poise the heat between cool and hot amps, our workers care to install all transistors cling the aluminum board for avoid the vibration cause the sounding worst. From our testing, with the aluminum board bring clear detail reproduce and less harsh than take off the aluminum board .


    Components:
    Uses all audiophile grade components, including DALE resistors, WIMA & SOLEN caps, custom order NOVER (UK brand) caps, all audiophile grade input (Neutrik) & output sockets (CMC) and gold IEC socket. The output transistors are 80 pcs ON Semiconductor transistors. Master-2H has all parts of four channels exact-matched before installation.



    Improvement may result in changes in specifications and
    design without notice.

    S/N Ratio

    >120DB

    THD <0.0008% (XLR input,3W @ 8ohm output state)

    Gain

    +28 DB

    Output

    >250W @ 8ohm
    >500W @ 4ohm

    Output Level (Max,RMS)

    58V Max


    Input sensitivety
     

    4V RMS @ XLR
    2mA RMS @ ACSS


    Input impedance
     

    94K ohm @ XLR
    <10 ohm @ ACSS

    Frequency Breadth

    20Hz - 20KHz ( <-0.1DB,XLR input,1W @ 8ohm output state )
    10Hz -100KHz (<-3DB,XLR input,1W @ 8ohm output state)





     

    Channels cross
     
    Mono

    Channels imbalance
     
    < 0.01DB

    Power Requirement

    220-240V AC 50 Hz

    Power Consumption

    250W static @230V

    Transformer Power

    1700W (4 transformers)

    Package Weight

    Approximately 70KG


    Dimensions
     
    W(340) H(260) D(450). (Each channels) (MM, Fully aluminium )

    Accessories

    Power cord *2 for test but not for working.






    Buy with confidence
    We have 920 Good Ratings from buyers View More Rating >
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    Item ID
    Date
    Ratings
    dj****
    9/14/2018 5:12:00 PM
    -
    re****
    9/13/2018 11:27:00 PM
    If anyone wanted to buy a very high quality microphone, this person is your best place to get it! Very awesome services and also very cooperative!
    ha****
    9/10/2018 12:29:00 AM
    -
    ma****
    7/31/2018 11:11:00 PM
    Great earpads. Fit perfectly with Superlux HD668B. Fast delivery. Definitely will be trading again.
    na****
    7/23/2018 12:51:00 PM
    Faster delivery
    da****
    7/12/2018 10:08:00 PM
    A bit late on the rating but would like to give thumbs up for seller. Very friendly and even called me about my parcel status. Will return to buy other headphones again. TQ!
    ck****
    7/6/2018 5:46:00 AM
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    ck****
    7/6/2018 5:46:00 AM
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    We guarantee that all the items we carry are authentic and brand new. If in any doubt, please send the purchased item to that respective brand's boutique in your country to verify.

    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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