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Audio-gd Master-1

[AUDIO-GD-MASTER-1]
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 1,189.99 EUR 
Audio-gd Master-1

Master-1#

Real Balanced ACSS Pure Class A Preamp
  • Fully balanced class A design built by discrete analog stages without any OPA or coupling caps in the signal channels.
  • Non- feedback ACSS analog output stage.
  • Uses three R-core transformers (135W total) with separate power supplies for the digital components and right and left channels.
  • More than 50,000uf audio grade NOVER capacitors are used to ensure ample and smooth power delivery.
  • A total of 8 groups of high-quality class A parallel PSU's, four double-stages for dedicated DC supply. To achieve a high S/N, the control circuit is powered with separate regulators.
  • Uses high grade parts and exactly matched transistors.
  • Four-channel 99 steps digitally controlled relay-based volume control avoids channel imbalance and improves sound quality.
  • 5 analog inputs: RCA X2, XLR X2, ACSS X1
  • Preamp output: XLR / RCA / ACSS
  • Memorizes all settings and resumes the last settings when powered on.


Main features
  • Fully balanced design, the gain stages and pre-driver stages working on class A , built by 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 well as class A amps.
  • Non- feedback ACSS analog amps .
  • Applies 24 pieces of ON Semiconductor "the King of transistors" MJL4281/4302 . Supports 250W X2 (8 Ohms) output.
  • The capacitance of the whole machine reaches as high as 140,000 uF, with two 750W circle core and two R cores transformers (Total 1500W) and separate power supplies for the right channel and left channels.
  • A total of 4 groups of high-quality class A parallel connection PSU's power the gain stages. To achieve a high S/N, the control circuit is powered with separate regulators.
  • Four channel 99 steps digitally controlled relay-based volume control avoids channel imbalance and improves sound quality.
  • 5 analog inputs: RCA X2, XLR X2, ACSS X1
  • 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.
  • 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.


Audio-Gd Master-1

Summarize#

This is the best preamplifier that I ever heard! Very neutral and musical. Never aggressive and very detailed. All the small inflections and nuances in the musical message are rendered. I was mostly impressed with the current power it has to control the low frequencies. They are rendered with clarity and detail... in all their nuances. No muddy sounds, only high precision. The air and space between all the instruments is also quite outstanding. I am very pleased and satisfied with my firsts auditions and I will proudly show and recommend your products to my friends. Thank you very much again for your professionalism. Will Audio-gd produce one day a high end DVD Audio, SACD or CD player? I would buy one without any hesitation.
Audio-Gd Master-1


Audio-Gd Master-1


Specification#

S/N Ratio
  • >120DB
Gain
  • +5 DB (70 steps volume control) (XLR)
  • +8DB (99 steps volume control) (XLR)
Volume characteristic
  • Linear @ 70 steps
  • Exponent @ 99 steps
Output Level (Max)
  • 9.5V @ RCA
  • 19V @ XLR
  • 4.8MA @ ACSS
Output impedance
  • 10 ohm @ XLR
  • >10M ohm @ ACSS
Input sensitivety
  • 0.775 V RMS @ RCA
  • 1.55V RMS @ XLR
  • 2mA RMS @ ACSS
Input impedance
  • 94K ohm @ XLR
  • <10 ohm @ ACSS
Frequency Breadth
  • 20Hz - 20KHz ( <0.15DB )
Channels cross
  • > 130DB
Channels imbalance
  • < 0.05DB
Power Requirement
  • 1 Version 100-120V AC 50/60 Hz
  • 2 Version 220-240V AC 50/60 Hz
Power Consumption
  • 43W class A @240V or 120V
Transformer Power
  • 135W (3 transformers)
Package Weight
  • Approximately 16KG
Dimensions
  • W430 X L430 X H93 (MM, Fully aluminium )
Accessories
  • Power cord X1
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This product was added to our catalog on Tuesday 22 September, 2015.
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