LKS Audio MH-DA004 Silvery Upgraded USB Version DAC Dual Core ES9038Pro Audio Decoder High Performance Digital-Analog Converter

LKS Audio MH-DA004 Silvery Upgraded USB Version DAC Dual Core ES9038Pro Audio Decoder High Performance Digital-Analog Converter

Difference:
- The standard version uses for Amanero USB module. The module uses a regular active crystal oscillator and is not equipped with independent power supply. When in use, it is connected to the decoder and computer through a USB cable, and the USB module supplies power from the computer's USB port.
- The upgraded USB version has improved two of the most critical locations that affect sound - the power supply and clock. Adopting for Crystek CCHD-957 ultra-low time jitter active clocks and has designed a separate ultra-low noise linear power module for USB operation. This power module is directly powered by the AC transformer of the decoder, which can greatly optimize the power quality of USB, The upgraded version of the sound has the same characteristics as a high-end CDT, with a wide sound field, vivid and moist sound, full and transparent, excellent extension at both ends, excellent sound density, exquisite and delicate sound, balanced and natural. The ones that have not been upgraded are relatively flat, with slightly rough and protruding high-frequency frequencies and insufficient texture. The low-frequency ones are masculine but lack a sense of hierarchy.
- For customers who often use USB to connect their computers, it is recommended that you choose the upgraded USB version.

Description:
- ES9038pro is currently the DAC chip with the highest performance indicators that can be seen. Two ES9038pro chips are used to work in mono MONO mode, allowing the two DAC chips to independently process the audio content of the left and right channels without interfering with each other, greatly improving the performance and auditory effect of the DAC. The official indicator for MONO mode is a dynamic range of 140dBA, which is 3dB higher than the 137dBA when using a single two channel operation. The official indicators are only for reference, but the fact that is relatively easy to see is that in the mono MONO mode, the signal output current of the DAC is twice that of the two channel mode. Moreover, because the left and right channels can be separated for power supply, the darkness of the sound background, the density, separation, dynamics, and structure of the sound can be significantly improved.

- The DAC chip is just the foundation of a machine, and the most crucial thing is the design and tuning of the peripheral circuit. In order to achieve the best sound playback effect using ES9038pro, it adopts two high-quality transformers to achieve 6 sets of AC power supply, a total of 13 sets of low noise voltage stabilizing circuits (many key parts use two-stage voltage stabilizing method). The second level voltage regulator uses the industry's highest performance power chip to provide a fast response, ultra-low noise power supply with sufficient current margin.

- In order to deal with the extremely high current output (signal current exceeding 100mA) in the unique MONO mode of ES9038pro, an IV conversion circuit has been specially designed. This part of the circuit is designed as a pure discrete component, and the substrates used are audio transistors, twin field-effect transistors, audio medium power transistors, etc., which currently have extremely low noise indicators. The correction capacitor also uses silver mica capacitors without compromise, with the aim of obtaining the most accurate and natural sound reproduction. This circuit mode is more excellent than traditional integrated operational amplifier outputs (such as OPA627, AD797, LME49990, OPA1612, etc.).

Key Features:
- In terms of USB, it adopts for Amanero USB solution, which is currently the leading USB playback solution in the industry. It is recognized that this solution has better sound than the popular solution for xmos, and has made improvements on the original Italian version. The USB module of the motherboard uses six sets of ultra-low noise LDOs for partial power supply (while the original version had two LDOs). In addition, on the upgraded version of USB, it uses for Crystek ultra-low noise clocks for upgrading, and provides a decoder power transformer self powered ultra-low noise stabilized power module to power the USB module. The sound enhancement effect is significant, making it very suitable for enthusiasts who use computers as players. And therefore, it can save the cost of purchasing an external digital player.

- The key position of the main clock, using for Crystal CCHD-575 femtosecond clock to provide extremely low jitter rate for ES9038pro (82fS at 100MHz) Clock supply. Experienced audiophiles know that when digital audio is restored, the clock is the soul of the system, and the importance of the clock can be seen from this. And in order to ensure the purity of the clock signal, it uses an independent set of AC power sources at no cost. After two levels of ultra-low noise regulators, it is supplied separately to this clock, greatly improving the quietness of the sound background and the stability of sound imaging.

- It is designed with independent power supplies for the two ES9038pro DAC chips that work separately on the left and right channels, reducing the power crosstalk of the left and right channels as much as possible, resulting in excellent sound separation and extremely accurate sound imaging stability.

- The discrete output circuit uses twin JFET field-effect transistor input and terminal 3A medium power transistor output, which can easily meet the high current output processing of ES9038pro. After more than 100 circuit parameter adjustments over three years, the sound performance is extremely natural, with excellent ductility in high and low frequencies.

- With a high standard analog output circuit, in order to achieve the best results with this circuit, it is specially designed with a Class A power supply circuit of the same high-end level, a constant current source for SHUNT circuit mode design, for Onsemi high-power adjustment transistor, and the use of electrolysis for Mundorf, matched with appropriate output capacitors and decoupling capacitors, the sound is natural, transparent, very balanced, and highly musical.

- In high-end systems, every tiny detail that affects sound cannot be ignored. It uses for Furutech FI03 gold-plated power sockets, for Cardas rhodium plated RCA audio output sockets, for Neutirk balanced output sockets, and so on. It is precisely the emphasis on these key components that can create a good sound system.

- All ports of MH-DA004 DAC support DSD input (coaxial, fiber optic, BNC, AES/EBU are DoP inputs, USB, I2S, etc. support DoP, DSD native source code input)

- For Amanero USB module used in this machine supports PCM and DSD decoding in USB access mode. PCM supports various bit rates ranging from 44.1K to 384K, and DSD supports DSD64, DSD128, DSD256, and DSD512 (for Windows).

- For Windows supports 32/64 bit XP/Vista/win7/win8/win10 and requires the installation of proprietary drivers (supports for KS/Casapi/WDM/ASIO).

- For Mac OS 10.6+and Linux UAC2 do not require drivers.

- Download for Amanero USB DSD driver and usage settings (please copy the following address to your browser to open): http://www.mu-sound.com/service.html

Specification:
- Dual chip ES9038pro decoding method.
- Two high-quality circular transformers, with a total of 13 sets of linear power supply.
- Equipped with a specially designed USB module for Italian Amanero, authorized by the original factory license. The USB module is equipped with a ground isolation chip, which can isolate interference signals from the computer to the audio system.
- Supports USB, I2S/DSD single ended signal (RJ45), I2S/DSD balanced signal (HDMI), coaxial, BNC, AES/EBU balanced, and fiber optic seven source inputs, all ports support DSD input.
- The analog audio output port includes a pair of standard RCA single ended outputs and XLR balanced outputs.
- The display screen adopts VFD display screen, which has exceptional display effect.
- Use physical buttons for operation.
- Supports digital volume adjustment from 0dB to 127dB, with 0.5dB a level. It also has the function of one click remote control to skip volume adjustment.
- Support multiple digital filter mode settings (see user manual for details). You can choose freely, and the attenuation characteristics of digital filters vary under different filtering modes.
- Support decoding of internal digital phase-locked loop bandwidth settings (see user manual for details).
- Support Deemphasis to emphasize on or off.
- The display screen has 4 levels of adjustable brightness. Adjust through the remote control.
- Remote power on and standby functions.
- Most settings have a memory function, which will automatically save the settings upon shutdown and restore them upon restart.
- Dynamic range: > 135dB
- Distortion: < 0.0002%
- Stereo separation: > 120dB
- The output amplitude of RCA unbalanced port is 2Vrms, and the output amplitude of XLR balanced port is 5Vrms.
- Machine size: 430 x 320 x 90mm
- Machine net weight: 7.0kg

Package Included:
- 1 x Host
- 1 x Remote Control
- 1 x User Manual (http://www.mu-sound.com/ch/about.asp?id=3)
- 1 x Power Cable
- 1 x USB Cable
- 1 x USB Driver and Using Setting Download (http://www.mu-sound.com/service.html)