AUDIO-GD MASTER 9P Dual Mono Amplier Balanced 2x70W 8 Ohm

AUDIO-GD MASTER-9P Dual Mono Amplier Balanced 2x70W 8 Ohm
15%
The Audio-GD Master 9P is an excellent fully balanced headphone amplifier and combo amplifier, featuring the newly developed ACSS design, which provides a sound that is as accurate and transparent with XLR as with ACSS. It also benefits from an optimized power supply to provide an extremely clean and stable electrical signal to all audio circuits.

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1 486,79 € tax excl.
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This product is discontinued
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Facturation France
SAV France

2 Years warranty

Accessories for this product

Find here a selection of useful and/or essential accessories for this product. These are specially selected by the Audiophonics team according to the characteristics of the product.

 
More info

This is the "Neutral edition" : MASTER 9PN.

Audio-GD Master 9P

Amplificateur Double Mono Symétrique 2x70W 8Ω

Audio-GD Master-9P Amplificateur Double Mono Symétrique 2x70W 8Ω

The Audio-GD Master 9P is an excellent fully balanced headphone amplifier and combo amplifier, featuring the newly developed ACSS design, which provides a sound that is as accurate and transparent with XLR as with ACSS. It also benefits from an optimized power supply to provide an extremely clean and stable electrical signal to all audio circuits.

The amplifier stage of the Master 9P has a unique current gain stage (ACSS) for the shortest possible signal path and a particularly neutral and faithful sound reproduction. This ACSS amplifier has a very low distortion level and is soldered directly to the main PCB. The gain and preamplifier stages here operate in Class A. The output transistors operate with a high rest current. The special design of this stage avoids switching distortion.

The ACSS used in the Master 9P architecture is a feedback-free technology using discrete amplifiers. The combination of ACSS and a feedback-free circuitry allows for beautiful dynamics, detail and sonic neutrality, while ensuring low distortion and high linearity. The ACSS stage uses four groups of high quality Class A PSUs. This parallel connection provides a high input impedance to prevent power supply pulses from affecting the gain stages.

Linear Fidelity output stage

The Master 9P uses Linear Fidelity technology on its output stages. These have no feedback but maintain a very low level of distortion and offer excellent linear performance.

A powerful amplifier

The use of high power components combined with a robust power supply ensures a high current output, allowing the Master-9P to accompany demanding loudspeakers. The Master 9P uses four channels of feedback-free output stages consisting of eight ON Semiconductor transistors, each with a power handling capacity of 230W/15A. The whole set reaches a capacity of 100000µF and two transformers are used with a power of 600W.

Impedance matching

In order to limit the impact of different output impedances depending on the DAC used, the Master 9P uses four groups of Class A FET cascode buffers. All input signals pass through these FET buffers to achieve a low output impedance.

Volume control

The Master 9P's volume control system acts at the input stage of the analog amplifier via a potentiometer allowing signal attenuation through relays and resistors. Here the volume control uses a variable passive I/V conversion at the output of the ACSS amplifier and does not degrade the signal quality.

Shielding

The Master 9P features complete separation of the left and right channels of the amplifier, power supply and transformer. It also uses a heavy aluminum alloy chassis to prevent transformer eddy currents from interfering with the PCB.

Technical characteristics

Specifications
Product typeAmplifier
Amplifier typeClass A
Inputs2x XLR
2x RCA
1x ACSS
OutputsSpeaker terminals
1x Stereo XLR headphone output
1x XLR 4 pins headphone output
1x Jack 6.35mm headphone output
SNR> 110dB
GainHigh gain : 34dB
Low gain : 20dB
Amplifier output power2x100W @ 4Ω
2x70W @ 8Ω
Headphone output power2x35W @ 15Ω
2x20W @ 25Ω
2x14W @ 40Ω
2x6W @ 100Ω
2x2W @ 300Ω
2x1W @ 600Ω
Input sensitivityXLR : 0.55Vrms
ACSS : 2mArms
Input impedanceRCA : 47kΩ
XLR : 94kΩ
ACSS : < 10Ω
THD+N< 0.05% @ 20W, 8Ω, 1kHz
< 0.002% @ 20W, 8Ω, 20kHz, 2Vrms, XLR input
< 0.055% @ 60W, 8Ω, 1kHz
< 0.005% @ 60W, 8Ω, 20kHz, 2Vrms, XLR input
General
Supply voltage220-240VAC 50/60Hz
Consumption50WW
Dimensions430 x 430 x 93mm
WeightApprox. 16kg
ColorBlack
Package1x Audio-GD Master-9PN
1x Power cable
 
Data sheet
InputACSS
InputXLR
InputRCA
OutputXLR
OutputSpeaker terminal
OutputJack 6.35mm
ColorBlack
Channel2 (Stereo)
ClassClass A / AB
Amplifier chipTransistors
Power (W)70.0
Remote ControlN/A
 
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AUDIO-GD MASTER 9P Dual Mono Amplier Balanced 2x70W 8 Ohm
The Audio-GD Master 9P is an excellent fully balanced headphone amplifier and combo amplifier, featuring the newly developed ACSS design, which...

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