In order to thank our old customers for their support and love, this time we provide a redemption service, please see the description at the bottom of this page.

   The design of Musheng''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s new flagship decoder MH-DA005 condenses Musheng''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s experience in the decoder field for more than 10 years, and the total development process lasted one and a half years.

    DA0The original intention of 05 was to make a DAC with higher sound, appearance, and craftsmanship than DA004, not an optimized update of DA004. The different design goals have established the hierarchical gap between DA005 and DA004.

   In order to achieve this goal, the main board has been proofed 6 times, the power board has been replaced with different schemes for more than 20 proofs, and dozens of parts have been tested. 

1. Newly designed power supply system

   The power supply in the audio system,Extremely important. We designed an advanced power regeneration system for DA005, which is like two storage ponds. When one group releases water, the other group stores water, alternating cycles. Under the well-designed control logic, the storage and discharge are completely isolated and do not affect each other, so that the influence of the mains noise on the DAC main circuit can be avoided to a large extent. On the other hand, because the circuits powered by traditional iron core power transformers have poor load regulation, the sound dynamics are compressed and the density is insufficient. The new power system does not have this problem, which is quiet, abundant, and The high-quality energy supply DAC circuit can reproduce the most realistic sound.

   In the DAC power supply circuit, we use a large number of industry-leading high-performance low-noise regulators from Linear Technology, Texas Instruments TI, etc., to ensure that each functional circuit has an independent secondary voltage regulator supply for each part of the circuit. Pure and quiet, sufficient energy. A total of 18 independent regulators are used.

   The power supply of the analog circuit is also very important. We have specially customized an O-type transformer. The primary and secondary windings are made of expensive single crystal copper silver-plated material. Due to the skin effect of alternating current, the current is basically from the silver layer on the surface. Flowing through, compared with copper wire and oxygen-free copper wire transformers, the sound has an essential difference, which is quieter, purer, finer, and fuller, and the transient response is better.（Same condition comparison）. In addition, it is sealed with a high-strength stainless steel shield, which can resist mechanical vibration and realize electric field shielding. The newly designed analog power circuit uses high-current, low-resistance power MOS as the regulator in the circuit structure, and twin discrete components form a voltage feedback control circuit to achieve extremely low output internal resistance and extremely low power supply noise. It can provide fast and abundant output response in the full frequency band where the analog output circuit works.

   The rectifier diode uses a silicon carbide Schottky diode with no recovery time. The main filter capacitor uses Mundorf non-inductive electrolytic capacitors, and the output capacitor uses Audionote fast clear stepless capacitors with Mundorf Supreme capacitors for high-frequency compensation.   

   The reverse recovery time of silicon carbide Schottky diode approaches zero,The switching speed between on and off state is very fast, and there is no reverse recovery when ordinary bipolar diode enters the switchCurrent.Traditional silicon-based or germanium-based bipolar diodes are used in switching rectifier circuits, because of the reverse recovery current, the gap between cut-off and conductionIt will produce very large pulse spikes, which directly interferes with the performance of the back-end circuit. As a result, the sound is rough and has burrs, while the silicon carbide diode is much more stable and smooth, and the texture and details of the sound are more prominent. In terms of cost, silicon carbide diodes are more than 10 times higher than ordinary Schottky diodes.

2. Analog output circuit

   The analog output circuit of DA005 uses a newly designed fully discrete circuit. The advantage of discrete components is that you can choose a single transistor with excellent characteristics, and the sound is more comprehensive than an integrated operational amplifier. DA005 uses a large number of twin JFETs and twin transistors, and the accuracy of the circuit is higher. Balanced output and single-ended output have the same LPF low-pass filter circuit. DA005 all adopts small volume, low temperature drift（Not more than 5ppm）, High precision（0.01%）The non-inductive resistance makes the sound more vivid and facsimile.

   For single-ended output terminals, we use customized high-conductivity tellurium copper gold-plated RCA plugs, Teflon cores, and Duran gold-silver alloy wires for lead out.

   High conductivity tellurium copper alloy, introduce its main excellent properties: 1) It has high electrical conductivity, the conductivity of tellurium copper alloy is 94%-98%, gold 65~75%, rhodium 35%, high copper content brass 28%; 2) Has a high thermal conductivity. 22% more than pure silver, 28% more than red copper; 3) Good arc resistance.

   In the analog circuit, there are two particularly important capacitors. We compared a variety of expensive copper foil, silver foil, gold and silver foil, oil immersion and other capacitors, and finally selected German GAD gold and silver foil capacitors, compared with GAD gold and silver. Foil capacitors and Mundorf flagship gold and silver foil oil-immersed capacitors, GAD gold and silver foil capacitors have more solid internal materials（From manufacturer introduction）, Fuller full frequency, higher density, richer details and stronger texture. The price of GAD gold and silver foil capacitors is also more expensive.

Third, the clock system

   DA005 whole machine（Includes USB circuit）, Using four high-performance clocks, the quality exceeds the Crystek CCHD957 and CCHD575 series widely used in high-end machines.

Take 24.576MHz in the CCHD957 series as an example, the key near-end 10Hz sideband noise is -97.9dB√Hz, DA005''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s custom clock is -108.6dB√Hz, there is nearly 10dB noise reduction. The direct benefit is that the sound is more natural and accurate.（Contrast with external conditions） 

Four, accessories design

   The internal wiring of DA005 uses a large number of high-purity Jensen pure silver wires. Compared with 7N single crystal copper wire, pure silver wire has a higher sound density, and is better in detail, texture, sound field, transparency, and smoothness.

   The single-ended output terminal of DA005 is connected with copper tellurium alloy and Duran gold-silver alloy wire.

Five, built-in high-performance USB interface

   Specially designed high-performance USB interface, Italian Amanero solution, four-layer board design. Use multiple low-noise power supplies, three very excellent low-sideband noise clocks（Better than Crystek CCHD957）. High-speed isolator, can do 3KV isolation to the computer ground. Make the sound more pure.

   In the USB access mode, it supports PCM and DSD decoding. PCM supports various code rates from 44.1K to 384K. DSD supports DSD64, DSD128, DSD256, DSD512.

   Please refer to the file in the USB drive attached to the whole machine for the setting method of USB driver and computer player.

Six, the main parameters

1. Decoding chip ES9038pro X 2 pieces
2. Input channels: USB, coaxial 1, coaxial 2, optical fiber, AES/EBU, I2S-E, I2S-H
3. Single-ended RCA output level 2Vrms
4. Balanced XLR output level 4Vrms
5. Digital volume attenuation function, attenuates at 0.5dB intervals, which can be skipped
6. Digital filter mode optional
7. Digital phase locked loop DPLL can be set
8. DSD channel swap function that can be set
9. De-emphasis function that can be turned on or off
10. Dop that can be turned on and off（DSD over PCM）Receiving function
11. USB supports PCM44~384K, DSD64~DSD512
12. I2S-E, I2S-H support PCM44~PCM384K, DSD64~DSD512, Dop64x
13. Coaxial, optical fiber, AES/EBU support PCM44~PCM192K, Dop64
14. Full-featured remote control with remote control standby function
15. The VFD display has multi-level brightness adjustable, and the screen can be automatically turned off
16. Dynamic Range>136dB
17. distortion<0.0002%
18. Stereo separation>120dB
19. Frequency response 0~20KHz±0.2dB
20. Rated power 16W
21. Size 430*350*78mm（Width * depth * height）, The height includes the machine feet
22. Machine net weight 9.0kg
23. Power supply voltage 100~120V or 200~240V optional

Seven, feature summary:

1. Musheng advanced regenerative power system, supplemented by sophisticated power monitoring circuit
2. Up to 18 high-performance low-noise regulators
3. Four extremely low sideband noise clocks
4. O-type full single crystal copper silver-plated bull
5. New analog power circuit structure
6. Silicon carbide diode without recovery time
7. Mundorf main filter capacitor, Audionote fast clear stepless capacitor, Mundorf Supreme capacitor, GAD gold and silver foil capacitor, MIT capacitor
8. 8-group stand-alone single circuit provides fully balanced and single-ended output, fully discrete design, twin pairs of tubes, low temperature drift 5ppm non-inductive resistance
9. Tellurium copper gold-plated Teflon core RCA output terminal with Duran gold-silver alloy lead
10. Jensen sterling silver wiring inside the machine
11. Furukawa FI-03G power plug
12. The main board adopts six-layer immersion gold board design
13. High-grade aluminum chassis
14. Large size VFD display

8. Sound characteristics

     The decoder is part of the sound source in the sound system, and it can be said that it is extremely critical to grasp the lifeblood of the sound in the entire system. A reasonable perception is that the sound source needs to be neutral and accurate, and z is close to the essence of the recording to the greatest extent, so that it can provide strong support for the faithful playback of the back-end system. Therefore, the design and adjustment of DA005 also adhere to the characteristics of neutral and neutral. Thanks to the new circuit architecture design and the uncompromising selection of materials, 005’s sound texture, density, sound field, level, transparency, fineness, smoothness, detail, and micro-dynamics are all significantly improved compared to 004. Strictly speaking, it has surpassed several levels of improvement, showing a high level of acoustics and musicality, and has a comprehensive and true expression of various types of music. Especially for the improvement of the mid-range, it can be said that the ES9038 has a textured but not full and emotional sound characteristics. 

Nine, packing list   

1. remote control
2. American standard power cord
3. USB cable
4. T2 hexagon socket screwdriver（Used to remove the remote control to replace the battery）
5. U Disk（Contains the electronic file manual, this machine no longer provides the paper version of the manual）
6. Warranty Card

X. Logistics and transportation

      SF Express nationwide free shipping, where SF Express does not, please contact the owner to send other logistics or express delivery. 

ElevenAudition and warranty

   Because of its high value, the new machine no longer provides trial listening services. This machine is provided with a special listening machine. If necessary, please contact us to apply for a listening machine.（The audition requires the buyer to bear the round-trip postage）

   Why is the new phone not recommended for those who listen to it? Because all the parts in the new machine are new, it has only undergone dozens of hours of factory aging test, and it has not fully reached the best condition. If you choose the new machine for audition, you can''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''t fully understand the quality of the machine in the short term.

   The whole machine has a one-year warranty and lifetime cost maintenance.

12. Instructions for DA004 to redeem DA005
   

   In order to repay the love of new and old users to Musheng, we provide a trade-in service for the new model of DA005. The redemption instructions are as follows:
1. The old model that can be exchanged is MH-DA004.
2. Users are required to provide DA004 purchase information, such as screenshots of online purchase records.
3. Discount calculation method:
   Purchased within three months: actual purchase price -500
   Over three months:（The actual purchase price of the used machine）X（1-（Months since purchase）X2%） （That is to calculate according to the loss of 2% per month）The reserve price is 60% of the original price.（More than 20 months are all priced at 60%）
   Example: a. DA004 was purchased in December 2019, and the actual purchase price is 9999. I hope to redeem in August 2020. After 8 months, the redemption price is calculated=9999X(1-8X2%)=9999X84%= 8399.
   Example: b. DA004 was purchased in May 2017, and the actual purchase price is 9999. If you want to redeem in August 2020, if it has been more than 23 months, it will be converted at 60% of the reserve price. The calculated redemption price = 9999X60%=5999 .
   A machine that is traded in for a new one must ensure that the performance is intact, and if there is a poor performance, it needs to be priced separately.
   The refurbished machine also needs to be priced separately.
4. The buyer needs to bear the cost of returning the old machine.
5. Replacement operation process:
   a. The buyer proposes the intention of replacing the machine and provides us with the purchase information of DA004
   b. Calculate the actual deductible price
   c. The buyer purchases the new model DA005 at the current actual transaction price and sends it back to DA004
   d. We received DA004 for inspection and feedback
   e. After the buyer confirms the receipt of the goods, the payment will be refunded