Audio-gd Master-11

DAC MASTER-11 #

Discrete DAC + Headphone amplifier / Preamplifier Combine from the Master 7 + 9 Built in DSP data processor Supports up to 192KHz at 8X times sampling 32bit / 384K Asynchronous Transfer Amanero combo384 Built in 4 Pieces Hi-grade PCM1704UK Chips 9000mW at 40 ohm (Class A, per channels ) 16000mW at 25 ohm (Max, per channels) OCC wires and TCXO built in

Main features:#

Since the Reference 10 was released more than 36 months ago, we have spent more than 12 months in testing and development for the Master 11 release just for the date of Audio-gd 11th Anniversary.
The Master 11 is the ultimate design of the PCM1704 chip with built in class A headphone amp / preamp .It is upgrade from Reference 10, combine from Master 7 and Master 9.
The newly designed DSP processor is soldered on the main board directly for best signal transfer and faster data processing and clocking, it brings the detail, transparency and dynamics to another level over all other audio-gd DACs. It allows users to hear the flaws and perfections of the source recording (matched with a revealing power amp, speakers and headphones ).
It supports up to 32bit / 192KHz through USB and I2S input, 24bit / 192KHz through SPDIF inputs (NOS, 2X , 4X and 8X oversampling support).
There are no design compromises, no parts are upgradeable, built with all high-grade audio parts, OCC wires, TCXO ,ect.
It is a fully new design concept . The SPDIF inputs have applied special interfaces for processing data, allowing the highest sound quality for the different SPDIF inputs.

• IN1: Optical input, up to 24bit / 96KHz support .
• IN2: coaxial input, up to 24bit / 192KHz support .
• IN3, Coaxial input, up to 24bit / 192KHz support .
• IN4, BNC input , up to 24bit / 96KHz support .
• IN5 , I2S input, up to 32bit / 192KHz support .
• IN6 , USB input, ,up to 32bit / 192KHz support .

DAC / Headphone amp / preamp all in one
- Fully balanced pure class A design built by discrete analog stages without any OPA or coupling caps in the signal channels.
- Non- feedback ACSS analog output stage.
- Total applied 8 pcs exact matching 150W transistors ( In total 1200W ) as the output stages for implement large class A output power.
- Uses three R-core transformers (In total 195W ) separate power supplies for the digital control components, right and left channels.
- More than 50,000uf audio grade NOVER capacitors are used to ensure ample and smooth power supply.
- A total of 9 groups class A PSU's are used to purify the power supply. To achieve a high S/N ratio, the control circuit is powered with separate regulators.
- Uses high-grade parts and exactly matched transistors.
- Four-channel 100 steps digitally controlled relay-based volume control avoids channel imbalance and improves sound quality.

• 6 digital inputs: Optical / RCA coaxial / RCA coaxial / BNC coaxial / I2S / USB
• 3 analog preamp inputs: XLR / RCA / RCA
• Preamp / DAC output : XLR / RCA (Variable in Preamp mode, fixed in DAC mode)
• Headphone amp output: 4pins XLR X1 / 3pins XLR X2 / 6.3MM X1
• Memorizes all settings and resumes the last setting when powered on

Devices Characteristics:#

Two-channel Digital Interpolation Filter and data in-phase processor for digital audio.
208-pin PQFP package, Manufactured on 300-mm wafers using, 90-nm low-k dielectric process.
Devices offer advanced features for high-performance digital signal processing (DSP) applications with up to 250-MHz.
Data and Master-clock in-phase processing just without jitters.

Filter Configuration:#

Core power supply voltage: 1.2V.
I/O power supply voltage: 3.3V.
Programmable Functions: hardware control mode.
Two-channel 1-times / 2-times / 4-times / 8-times oversampling , supports Bypass mode (NOS mode.).
Three-stage linear-phase ( group delay distortion : Zero) FIR filter configuration.

Filter Characteristics: #

Stopband Attenuation: -50DB / -90DB / -130DB.
Passband: 0-0.4535Fs.
Passband Ripple: within ±0.00001dB.

Input/Output:#

Input Data Formats: I2S
Input Word Length: 16, 20, 24 or 32 Bits
Output Word Length: 16, 20, or 24 Bits
Output Data Formats: MSB-First, Binary Two's Complement
Sampling Frequency: 32kHz to 192kHz
Supports 24 Bits, 192 kHz Sample Rate

Master-Clock:#

Clock Autodivide Circuit Supports four Master-Clock Frequencies : 256Fs, 384Fs, 512Fs, 768Fs
Built-in two groups high performance PLL , supports low jitter Master-Clock output.

Specification#

S/N Ratio	>120DB
Gain	+16DB
Channel cross	> 130DB
Channels imbalance	< 0.05DB
Frequency Breadth	20Hz - 20KHz (< -0.1DB) 1Hz - 140KHz ( -3DB)
Output Level	Headphone output XLR : 19V RMS (balance, max) Preamp Variable output :10V RMS (balance, max) DAC Variable output : 5V RMS (balance, max) ACSS: 1.2MA+1.2MA
Headphone amp output power ability	1600mW / 25 ohm 8000mW / 50 ohm 4000mW / 100 ohm 1300mW / 300 ohm 650mW / 600 ohm (Only for >15 ohm headphone.)
Output impedance	1 ohm / Headphone output 1 ohm / DAC output
Input Sensitivity	0.5 Vp-p(75 Ohms, Coaxial) 19 dBm (Optical) USB1.1, USB2.0 (Full Speed)
Support Operate Systems (USB)	Windows, OSX, Linux, ISO
Support Sampling	USB / I2S mode : 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz BNC mode : 44.1kHz, 48kHz, 88.2kHz, 96kHz Coaxial mode : 44.1kHz, 48kHz, 88.2kHz, 96kHz, 192kHz Otical mode : 44.1kHz, 48kHz, 88.2kHz, 96kHz
Power Requirement	Version 1 : 100-120V AC 50/60Hz Version 2 : 220-240V AC 50/60Hz
Power Consumption	45W
Package Weight	15kg
Dimensions	W430 X L430 X H93 (MM, Fully aluminiu)
Accessories	AC power cord x1 USB cable x1