睿志音响

	Wisdom in mind, enthusiasm at heart.

Master 7(The PCM1704 Ultimate Design)
Dedicated Discrete Fully Balanced DAC

Full new software DSP inside
Built in 8 Pieces PCM1704UK Support up to 192KHz
32bit / 384K Asynchronous Transfer USB-32 Module
OCC wires & TCXO applied

Price: (Exclude shipping cost)
USD2180 ( USB with TCXO version )

Master-7 USB version

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Specs

Technology Detail

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Feedbacks:
http://www.head-fi.org/products/audio-gd-master-7/reviews/8087
http://www.head-fi.org/t/625793/audio-gd-master-7-discrete-fully-balanced-dac-pcm1704
http://bbs.audio-gd.com/dispbbs.asp?boardid=2&Id=27207 （Chinese）

Click to read the USB-32 character                              USB-32 Introduce

What's new in the Master 7:
          Since the Reference 7.1 release , already have more than 20 months . We spend more than 10 months test , now release the Master 7 .
          Master 7 is the ultimate design of the PCM1704 chips .
          The full new design DSP processor solder on the main board direct for best signal transfer and faster process data and clock , it bring the detail transparency and dynamic to another field than all other audio-gd DACs , it is allow users adjudgement the flaws or how beautiful of the source and records if match with a revealing amp .
           It support up to 32bit / 192KHz through USB and I2S input, 24bit / 192KHz through SPDIF inputs ( NOS, 2X , 4X and 8X oversampling support . ).
           There is no compromise building , have not any parts can for upgrade , built in all audio grade parts , OCC wires, TCXO , ect .
           It is a full new design concept . The SPDIF inputs have applied specialty interface process the data, this is allow the best parameter design for different type SPDIF inputs.
           IN1 : BNC input, up to 24bit / 96KHz support .
           IN2: AES input, up to 24bit / 192KHz support .
           IN3, RCA coaxial input, up to 24bit / 192KHz support .
           IN4, optical input , up to 24bit / 96KHz support .
           IN5 , I2S input, ,up to 32bit / 192KHz support .
           IN6 , USB input, ,up to 32bit / 192KHz support . (In Non-USB version, IN6 is I2S input)

Fully balanced discrete analog stages without any OPA and couple caps in the signal channels.
Non- feedback ACSS analog output stage .
Total of 21 groups dedicated power circuits ( 19 groups of high-quality class A parallel connection PSU with dedicated DC supply double-stage PSU ) and more than 50,000uF caps are used to purify the power supply.
USB Audio Class 2 High-speed Input from Windows / MAC / Linux ( We can not guarantee it can working with every Linux device )
Supports High / full speed Asynchronous Transfer Mode up to 384K / 32Bit ability .
Resolutions support 16 / 24 / 32 Bit with sampling rate support 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz ( USB / I2S )
Supports up to 24 Bit/192KHz ( SPDIF )

Advice:
             1, Master 7 has extremely high fidelity and and ultra transparency allow users hear anythings in the records . Master 7 have better dynamic and detail than the NFB-7.1HE, the topics ES9018 DAC design from us .
              2, It is better not to stack gear on top of each other, if must stack Master 7 on other gear, place a paper or other insulating material on top of other gear, because Master 7 has conductive aluminium feet .
             3, Attention must be given to matching suitable power cable, coaxial cable and output signal cable.
             4, Master 7 have 3 feet under bottom side for the best balance state , if customers want 4 feet , please ask the custom order .
　

Feedback from users :

19th Sep , An user from New Zealand:

I am very impressed with the Master 7. Well done! It is definitely a big step up from the Reference 7.1 and NFB-7.1. That Via USB chip is great and deserves to be used in a master series Digital interface with built in I2S output. I can see that any flaw any where else in the system would be very obvious. I have heard some mixing errors I had never noticed.
The Master 7 is a significant upgrade on the Reference 7.1 which was already an amazing performing DAC. The improvements in resolution and imaging are well beyond the increase in price and the built in USB32 input out performs even my Audiophilleo 1 with external power. I can think of no DAC at up to twice the price of the Master 7 that competes with it for performance.”
　

5th Oct , Dmitry from Russia:

My Audio-gd way was from FUN through DAC19 through RE5.2 to M7 and each next device was much more better than previous.
But M7 now is the BEST what I hear from Audio-gd gears. The soundstage is more detailed andholographic but not oversharped, vocal voice is fantastic natural, the scene is deep.

30th Nov , Adrian from Brazil:

This is to let you know I've received the Master-7 and it's a great sounding dac! Very neutral and full sounding. Before this I had NFB-2 and Master-5. In comparison with Master-5 wich is a PCM1704UK dac also, the Master-7 have a similar signature, but the sound is more emotive, powerfull and I can listen at lower volumes and hear all the details. All I can say that Master-7 paired via ACSS with Master-10 integrated amp is the best sound I've heard. Thank you and please do keep making great equipment!
　

27th Dec , Kim from Korea:

         I listen speaker system
         My system is dynaudio 25th special + master10 amp + maste7 usb dac
         And i use siltech cable.

        This sound is very good and fantastic.
        Dynaudio's esotar 2 tweeter sound very sweet and master7 give more clarity and master10 amp give power.

        Especially, i surprised master7 usb .
        Very very different re7.1 and master7 .
        I think master7 have not 1or 2 upgrade.
        Master7 have much more upgrade.

        After i listen master7, i listen my friend's re7.1 .
        I feel that My friend re7.1 sound have less clarity and sound information .
        Master7's sound information is a lot .
        So sometimes i feel that this sound very much to me .

         Anyway i am happy when i listen music

　

17th Jan. , An user from Japan:

Some initial results of my experiments:

              I used the M7 and Calyx DAC (which uses 1 ES9018 in multi-channel dual-differential mode with NE5532 output opamps and is USB powered).

              Audiophilleo 1 to each DAC: M7 (input 3) sounds more "real". Calyx sounds a little less natural.
              DIV3 to each DAC: M7 (input 1 from DI coax out) sounds the same as the Calyx (from DI RCA out). The sound is very good.
              Direct USB input to each DAC: M7 sounds MUCH better than the Calyx USB input, which uses an XMOS chip. The Calyx sounds less detailed and boring and unnatural.

Best sound (all about equal):
              M7 USB32,
              DI V3 to either DAC,
              Audiophilleo to M7.

　

13th May. , McIntosh from USA:

My friend Don McIntosh wanted me to relay this message to you and I quote "Congratulations on the monoblocks and stereo amp, they are SENSATIONAL! The chain of Audio-gd gear in my system never sounded so great through my McIntosh XRT2K speakers! Keep up the good work. Your friend (signed) Don McIntosh."

Combo: Master 7 + Master 1 + Master 2
　