Audio-GD – R2R11- 2019 – Discrete Single Ended R2R Ladder DAC – PCM / DxD / DSD – Pre- & Headphone Amplifier

BUNDLE DEAL
This product + & Hifiman Sundara
30 EURO DISCOUNT

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Note: Includes latest firmware release from Audio-GD released (Silent PCM sample rate switching)
Note: By default, the fixed position is deactivated for safety when used as a preamplifier. It can be reactivated by moving the jumper inside the device.

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HIGHLIGHTS

• Discrete DAC single ended headphone- and pre-amplifier
• True NOS , R-2R discrete ladder DAC
• Built in pre- and headphone amp
• Built in 2 groups DA-8 R-2R modules with high speed CPLD correction
• Unique noise process technology will remove any digital artifact
• Native DSD and DxD Support
• Amanero Combo 384 USB interface
• Soldered with silver tin
• High quality ALPS volume potmeter

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SPECIFICATIONS

SPECIFICATIONS
INPUTS	USB Amanero Coaxial RCA SPDIF Optical Toslink
OUTPUTS	RCA Single Ended 6,35mm Jack headphone
S / N	118dB
Output level	Headphone: 10V RMS / Variable: 5V Max / Fixed: 2.5V RMS (High Gain) / 1V RMS (Low Gain)
Headphone output power	3500mW (25 Ohm) / 1800mW (50 Ohm) / 900mW (100 Ohm) / 300mW (300 Ohm) / 150mW (600 Ohm)
Headphone output impedance	12Ω
DAC output impedance	12Ω
Coaxial input sensitivity	0.5Vp-p (75Ω)
Optical input sensitivity	19dBm
Frequency response	20Hz – 20kHz (-0.2dB) / 3Hz – 350kHz (Analog)
Sampling rate	USB up to 384kHz / Coaxial up to 192kHz / Optical up to 96kHz

Compatibility	Windows, Mac & Linux
Consumption	12W
Weight	2.5 kg
Dimensions	180 x 220 x 55mm
Accessories	1x AC power cable / 1x 1.4m USB cable

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R2R 11 LADDER DAC CHARACTERISTICS

• R2R-11 and R2R-15 are a breakthrough of discrete R-2R designed ladder dac’s. Audio-GD are first in the market offering high performance discrete R2R in this price-range
• Two pieces DA-8 modules equipped with ultra-high speed CPLD processors to correct the discrete resistor ladder. Unique parallel processing to achieve superb performance
• Analogue section design based on Audio-GD’s ACSS current driven technology; fully discrete transistors amplifiers
• Double stages ultra-low noise high speed power supplies offers a musical and black background and favorable transparency
• Built in Amanero combo 384 USB interface. Amanero offers satisfying USB compatibility and marvelous sound quality
• True NOS design. NOS is less sensitive to jitter and offering neutral sound. To avoid the digital artifacts exlusive noise rejection processing technology is applied
• Native DSD support. Avert switch noise when changing DSD / PCM.
• Built with purity components: KOA transistors / Vishay high low tolerance resistors , silver tin soldering and ALPS 27 volume potentiometer
• Exotic sound quality! Smooth, coherent and analogue.
• Option to set Neutral or Warm sound (Jumper setting) according to personal taste.

RESISTOR TOLERANCE

Some manufactures claim to achieve good performance becuase they use lowest tolerance ladder resistors. The following calculation example will cover this. At 16 bit the tolerance of 1/66536, 0.1% (1/1000) it is by far not enough to achieve decent performance. Even using resistors with 0.01% (1/10000) tolerance, lowest tolerance available today,cannot deliver the desired performance This is just 16 bit, imagine a 24 calculation! To process 24 bit resolution it would require resistors with a tolerance of 001%. This is purely theoretical; if this tolerance would exist the discreteness of the switch logic chips will already have too much internal impedance and will shake-up such design.The tolerance of the resistor will never solve Imperfections of a ladder.

The solution lies in the correction the ladder and not only depend on the tolerance of resistors. It’s a combination of both: Ultra-low tolerance resistors controlled by a correction technology using very high speed with parallel FPGA processing.

USB SUPPORT

Download USB Amanero drivers for Windows 10
Download USB Amanero drivers for Windows 7 & 8

No drivers required for Linux and/or Mac OS
OSX 10.6+ and Linux with UAC2 compliant kernel
Microsoft Windows: KS/Wasapi/WDM/ASIO