AUDIO-GD HE-9 Balanced Headphone Preamplifier / Amplifier

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Audio-GD once again presents us with the quintessence of audio technology with its HE series products (here the HE-9 LE), an evolution of the MASTER series. They have benefited from the longest design and testing period in the history of the famous brand. Although Audio-GD had already been studying the products since 2006, the brand's top technicians are now offering them to us in their most accomplished form, with outstanding performance.

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Reference : 20574
New product

2 099,00 €tax incl.

1 749,17 € tax excl.
Including 0,05 € for green tax

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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.

 
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Audio-GD HE-9 LE Balanced Headphone Preamplifier / Amplifier ACSS RCA XLR

Audio-GD HE-9 LE : Front view


Audio-GD
 
once again presents us with the quintessence of audio technology with its HE series products (here the HE-9 LE), an evolution of the MASTER series. They have benefited from the longest design and testing period in the history of the famous brand. Although Audio-GD had already been studying the products since 2006, the brand's top technicians are now offering them to us in their most accomplished form, with outstanding performance. The LE version incorporates output buffers to improve the sound quality of the preamp, dual volume control to match the different output levels of your sources perfectly, and paired modules for the left and right channels for perfect sound coherence. Furthermore, this version replaces the Regenerative Power Supply technology with a more traditional linear power supply.

Audio-GD HE-9 LE : Exquisite interior and connectors

This HE-9 has no fewer than five analogue inputs to meet every need: 2x RCA, 2x XLR and 1x ACSS, alongside three analogue outputs: XLR, RCA and ACSS. Not forgetting, of course, the headphone outputs on the front panel: XLR 3-pin, XLR 4-pin and Jack 6.35mm, all three stereo.

Each Audio-GD product is thoroughly tested using one of the world's most powerful systems: Audio Precision's Audio Analyzers 2700 Series.

Audio-GD HE-9 LE : Rear panel view

Audio-GD HE-9 LE : Class A / Balanced / ACSS / XLR / RCA

This HE-9 headphone preamplifier/amplifier is designed around a purely symmetrical Class A ACSS discrete circuit, with no OPA whatsoever and a separate power supply. This avoids any electromagnetic interference on the processed signals.

It has no less than three R-Core transformers for a total power of 145W and a power consumption of just 54W. It also has 100.000µF of very high-end Nover capacitors and eight transistors of 150W each for the output stage.

Audio-GD HE-9 LE : Interior
Audio-GD ACSS

Audio-GD HE-9 LE : ACSS

Audio-GD has its own signature technology called ACSS for Audio-GD Current System Signal. Thanks to the company's expertise and know-how, this technology offers a less coloured, more detailed sound with unrivalled neutrality. When the ACSS output is used, the XLR and RCA outputs switch to mute mode.

Technical characteristics

Specifications
Product typeHeadphone amplifier / preamplifier
Signal-to-noise ratio (SNR)> 130dB
Total harmonic distortion (THD)< 0.0025%
Total harmonic distortion more noise (THD+N)< 0.0025%
Frequency response (XLR)20Hz - 100kHz (< 4dB)
Max output levelXLR : 19V
RCA : 9.5V
ACSS : 6mA
Input impedanceXLR : 94kΩ
ACSS : < 5Ω
Output impedancePreamp XLR : 10Ω
Balanced headphone output : 2Ω
Balanced headphone output power15W @ 25Ω
10W @ 40Ω
4W @ 100Ω
1350mW @ 300Ω
Single-ended headphone output power4W @ 25Ω
2500mW @ 40Ω
1000mW @ 100Ω
350mW @ 300Ω
Crosstalk< -130dB
Transformer power145W (3 transformers)
GainHigh gain : +20dB
Low gain : +10dB
Volume control100 steps
Exponential curve
General
Consumption54W (Class A)
Weight18kg
Housing materialAluminum
ColorBlack
Dimensions430 x 485 x 123mm
Condidionnement1x Audio-GD HE-9 LE
1x Remote control
1x Power cord
 
Data sheet
InputACSS
InputXLR
InputRCA
OutputXLR
OutputACSS
OutputRCA
OutputJack 6.35mm
ColorBlack
ClassClass A / AB
Remote ControlYes
 
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AUDIO-GD HE-9 LE Balanced Headphone Preamplifier / Amplifier ACSS RCA XLR
Audio-GD once again presents us with the quintessence of audio technology with its HE series products (here the HE-9 LE), an evolution of the...

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