USB DAC Headphone Preamplifier Tube DAC Decoder Musical Paradise MP-D2 MK3 Deluxe (Dual AK4497 Version)

USB DAC Headphone Preamplifier Tube DAC Musical Paradise MP-D2 MK3 Deluxe (Dual AK4497 Version)

Improvement of MK3 Deluxe Version (Compared with MK3):
- Remove unused optical input and add Bluetooth HD input for APTX HD.
- Core linear voltage regulator chip is increased from the original two to six, and the left and right channel DAC chips are independently regulated. This also allows ES9038PRO to be connected to high frequency clocks above 40Mhz (such as 60Mhz atomic clock, 100Mhz OCXO constant temperature clock), and so that ES9038PRO can support DSD512, connecting to external clock.
- Increase the working current of signal tube, optimize working state, and improve the sense of sound density and moisturization.
- Re-layout and optimize PCB traces to reduce mutual interference between digital and analog signals, and the background is darker.
- Reduce the output level when using E88CC, 6922 tube to 2.5V, to avoid compatibility problems with poor input performance caused by the tubes. Now when using 6H6 tube RCA output, two gain switches on the back are turned to H side. When using E88CC, 6922, 6DJ8 tube RCA output, turn them to L side.
Users who needs XLR output, when using E88CC, 6922, 6DJ8 tubes, turn the gain switch to H side.
- Coaxial and AES inputs are upgraded from the original support of 96Khz to 192Khz.
- All rectifier diodes are upgraded to the latest low-loss, high-speed series, which further improves the sound quality.
- Filament power supply is changed to balanced landing, and a small-capacity filter capacitor is added to reduce the noise of individual bad tubes.
- Tube high-voltage filter capacitor is added with high-quality capacitor filter to further improve the sound quality.

Sound Characteristics:
- Wide sound field, wide depth, and strong three-dimensional sense.
- The air is full and the sound is elegant.
- The music is full of flavours, exquisite and touching, making people tireless.
- Zero burr, silky smooth.
- High resolution and delicate sound.
- High dynamics, sufficient low frequency. Never be soft and never compressed.
- Real and natural, thick and comfortable.

Technical Highlights:
- Using high-quality ultra-low ripple linear voltage regulator LDO chip, the comprehensive ripple is lower than 5uV, which maximizes the dynamic range and detail analysis ability.
- Adopt Japanese low time base error digital receiver chip and American low phase noise clock to reduce time base error. Both coaxial and AES inputs use digital isolation transformers to isolate front-end noise.
- All rectifier diodes use US high-speed and low loss series rectifiers.
- The total filtering capacitor capacity is more than 80,000uf, which is more powerful than general power amplifier filtering. The power quality has been greatly improved.
- The layout and routing of PCB circuit board have been improved by 7 times.
- Tube high voltage power supply with high voltage regulator circuit, which prolongs the service life of the tube and make the power supply more pure.
- USB module uses U208, which is twice as fast as the previous generation U8. Bluetooth input uses a CSR8675 chip for APTX HD.
- USB module I2S output with digital isolation circuit to isolate digital interference introduced by computers.
- USB module uses US low phase noise clock. If you need CCHD-575 series, or CCHD-957 series femtosecond clock, please contact us.
- USB module provides an external clock input. AK4490 and AK4497 can use 3.3V output 22.5792Mhz or 24.576Mhz atomic clock or OCXO constant temperature clock. ES9038PRO can use 3.3V output 22.5792Mhz to 100Mhz atomic clock or OCXO constant temperature clock.
- Vacuum Tube Rectification: Switching supports 6.3V series (6Z5P, 6X5) and 5V series rectifier (5AR4, GZ34, 5U4G, 274B, 5R4). There is no op amp in the analog output part, and full tube output supports 6.3V filament series (6H6, 6H30pi, 6922, E88CC) and 12.6V filament series (12AU7, 12BH7, E80CC) signal amplification tubes.
- American professional amp chip is used for independent headphone amplifier. Plug in headphones to automatically disconnect preamp output function.
- High power 150W and 100W double transformers provide independent power supply. 100W is responsible for the digital part and 150W is responsible for the analog output, ensure the purest and extremely high power supply.
- The first user-changeable DAC chip and output coupling capacitor design. The DAC chip module can be continuously upgraded and replaced. We will subsequently launch corresponding DAC module for users to plug in and upgrade. Users can change the output coupling capacitors of different brands and levels to customize different tone performance.
- USB input supports PCM384Khz, DSD256 (for AK4490), DSD512 (for AK4497), DSD128 (for ES9038PRO internal clock), DSD512 (for ES9038PRO external clock).
- Zero negative feedback analog circuit design.
- RCA and true full balanced XLR fixed level output with high and low level adjustment.
- Independent RCA preamp output interface.
- Use original HiFi resistance-capacitance components, American resistors, coupling capacitors, premium capacitors.
- High-quality Taiwan gold-plated terminals, Swiss XLR terminals and power filter sockets.
- Aluminum alloy chassis and shock absorber feet.

Technical Parameters:
- Frequency Response: DC to 50khz
- DR/SN: 127 dB
- Output Level: 5V balanced XLR, 2.5V single-ended RCA
- Input Interfaces: Coaxial, AES, USB. USB input supports up to PCM384Khz, DSD256 (for AK4490), DSD512 (for AK4497), DSD128 (for ES9038PRO internal clock), DSD512 (for ES9038PRO external clock). Other inputs support up to PCM 24Bit 192Khz. Bluetooth supports for APTX-HD, APTX, AAC and SBC.
- Compatible Signal Tubes:
  6.3V Series: 6H6 (Default), 6n11, 6H30pi, E88CC, 6922, 6DJ8;
 12.6V Series: 12AU7, 12BH7, E80CC.
- Compatible Rectifiers:
  6.3V Series: 6Z5P (Default), 6X5;
  5V Series: 5R4, 5AR4, 5U4G, 5Y3, 5BC3, 274B, GZ34.
- N.W.: 12.5kg

Package Included:
- 1 x Set of DAC Headphone Preamplifier

Download Driver and Materials For Foobar2000:
http://pan.baidu.com/s/1kU7jqfX