I have had this unit for about 1 year. It has always worked flawlessly, and is in great condition. This is the best version of Musical Paradise tube DACs in my opinion as you get the dual AKM chips, and a tube rectifier. Also, there is no streaming components like in the latest version, so in theory less noise. I have all the original tubes, power cord, capacitors, usb cable, BT antenna, firmware update tools, and original double box. Upgraded components are included. Upgrades include: 2 X Jantzen Capacitor 4.70µF 800VDC Superior Z-Cap Series Metalized Polypropylene - cost = $65 total 1 X Mundorf Capacitor 6.80uF 450Vdc MCap® EVO Oil Series Metalized Aluminum Polypropylene Axial - cost ~ $35 total RCA 6SN7 NOS Tubes ~ $75 RCA 5U4G ~ $40 ------------------------ TOTAL $ 215 The only reason I am selling is that I now have a different DAC solution and a different tube setup. It has been a hard decision to sell, as it is rare to find, sounds amazing and is so versatile. It has been fun to change components to get a different sound out of it.----------------------------- MP-D2 tube DAC was first released in 2014. It is a special killer DAC which can sound better than other 2x-5x price range DAC in the market according to some users’ comparisons and reports. We keep researching and improving it during the past 4 years to make it great. On Nov 10, 2019, we are glad to announce the latest and the best MK3 deluxe version. Improvements on top of MK31. Since most audiophiles use coaxial and AES inputs, optical input is cancelled, and wireless bluetooth APTX HD interface is added. 2. Ultra low noise LDO regulators for DAC circuit are increased from 2 to 6 units. They are also separated between left and right channels to increase current handling capability and decrease mutual interference. This change is also allowed power hungry ES9038Pro to run with 50-100Mhz external clock to support DSD256 & DSD512. 3. Increase plate current of signal tubes to make it sound a bit denser. 4. Reroute all PCB traces to further lower digital interference coupling to analog signal. The background is darker. 5. Lower output gain to achieve RCA 2.5V/XLR 5V when using E88CC (6922) tubes to avoid overloading some weak input capability amplifiers. Now, both gain switches should be set to H when using 6H6/12AU7/12BH7 tubes, and set to L when using E88CC/6922/6DJ8 tubes when using fixed RCA ouputs. 6. Coaxial and AES inputs can support 192Khz now. 7. Rectifier diodes are upgraded to latest Vishay low loss and high-speed series to improve overall sound quality. 8. Add in a high quality BENNIC XPP capacitor to the high voltage filtering circuit to further improve timbre. Sound characteristics 1. Huge and deep 3D sound stage. 2. Airy and liquid high. 3. Musical, sweet and silky smooth mid range. 4. No fatigue feeling for long time listening. 5. High definition with plenty of micro sonic details. 6. High dynamic, strong and deep bass, no compression. 7. Neutral and vivid. Technical highlights 1. Top of line Linear and TI ultra low noise LDO. Ripple noise is less than 5uV. 2. AKM low jitter coaxial/AES receiver chip and low phase noise SiTime TCXO clocks. 3. Top of line Vishay low loss and high-speed rectifier diodes. 4. Total power filtering capacitance is over 80000uf, more than what are used in regular amplifiers. 5. High voltage supply of tubes is regulated to prolong tubes life and less ripple noise. 6. USB module employs latest XMOS U208 processor, its speed is double of its predecessor U8. 7. Bluetooth input employs flagship CSR8675 APTX HD chipset. 8. USB module owns I2S isolation to isolate noise coming from computer and other usb source devices. 9. USB module uses SiTime low phase noise clocks. Users can choose leading edge Crystek CCHD-575 femto clocks option as well. Crystek CCHD-575 can provide a bit more sonic micro details than SiTime. 10. USB module provides external clock input port. AK4490 and AK4497 modules can accept 3.3V 22.5792Mhz or 24.576Mhz clock?ES9038PRO can accpet 3.3V 22.5792Mhz to 100Mhz clock. Crystek femto, Rubidium ATOM and OCXO clocks are recommended. 11. No OPAMP design, tubes ouput only. Employs tube rectifier. It can switch between 6.3V filament (6Z5P?6X5) and 5V filament (5AR4, GZ34, 5U4G, 274B, 5R4) rectifier tubes. It can also switch between 6.3V filament (6H6?6922?E88CC) and 12.6V filament (12AU7, 12BH7, E80CC) signal tubes. 12. Independent headphone amp employs MAXIM professional headphone chipset. Insertion of a headphone disconnects preamp output automatically. 13. Dual powerful 150W and 100W toroidal transformers are employed to separately supply analog and digital sections. 14. The worlds first user-swappable DAC chip module and output coupling capacitor design. The DAC chip modules are users upgradable. In the future, a new DAC chip will be released. We will introduce the corresponding DAC module for user upgrade. Users can even change different output coupling capacitors to customize the sound characteristics they like although the stock Obbligato Gold coupling caps sound great already. 15. A MCU firmware downloader is included, so the user can upgrade the firmware for improvments and adding support for more future DAC modules. Users can enjoy new DAC chips without changing the whole machine. 16. Zero negative feedback analog output circuit design. 17. Fixed RCA and full balanced XLR outputs come with high and low gain switches for output gain adjustment. 18. Independent RCA preamp output port can provide up to 15V amplification. 19. Use genuine audiophile-grade components, such as US Vishay resistors, Obbligato Gold coupling capacitors, Rubycon, Panasonic, ELNA electrolytic capacitors. 20. High quality gold-plated RCA terminals, XLR terminals. Standard IEC power plug comes with EMI noise filter. 21. Aluminum alloy case and suspension feet. Technical Specs Frequency response: DC to 50khz DR/SN: 127 dB Fixed output level: 5V balanced XLR, 2.5V single-ended RCA Preamp variable output level: up to 15V Input interface: USB input supports up to PCM384Khz, DSD256 (AK4490), DSD512 (AK4497), DSD128 (ES9038Pro), DSD512 (ES9038Pro with external 60-100Mhz 3.3V clock). Coaxial and AES inputs support up to PCM 24Bit 192Khz. Bluetooth up to APTX-HD. 6.3V filament signal tubes: 6H6(stock), E88CC, 6922, 6DJ8. 12.6V filament signal tubes: 12AU7, 12BH7, E80CC 6.3V filament rectifier tube: 6Z5P (stock), 6X5. 5V filament rectifier tubes: 5R4, 5AR4, 5U4G, 5Y3, 5BC3 with adapter, 274B, GZ34, GZ33. Dimension: W 34.5cm x D 38cm x H 15cm Gross weight: 12.5 kg Input voltage: 110-120V or 220-240V, pre-configured to the destination country. Can be changed later by the user.

Bought this direct from Garry when new and has very low hours on it. Believe it has a Chinese rectifier and Russian output tubes (see pics). I did upgrade to the AKM4497 DAC chips and the USB board was the latest at the time as well. Optical input replaced with bluetooth, so select Opti on the front panel when going wireless. Selling as-is... everything works and sounds great as expected - however, I am unable to provide tech support for this. Know that if you have any problems (USB was plug and play with my Mac), Garry at Musical Paradise is your man. Excellent communication and customer service from his company. One of the absolute best! Ships in its original box and packaging. What you see pictured is what you will be receiving. No power cord included but if you really need one, write me after purchasing and Ill find one to toss in. Ships either via UPS or USPS (whichever is more economical), will be insured and require an adult signature at the time of delivery.

The device is in great operating condition with minimal signs of use for its age Discontinued but still upgradable Info from the site: USB line interference form dirty computer side always affect DAC performance. MP-D2 introduces innovative isolation technology to completely isolate between the dirty PC side and the clean DAC side, so it gives you the most pure USB PC-HIFI performance you have never experienced before. Power Supply 150W toroidal transformer for analog section. Additional 80W toroidal transformer for digital sections. They provide more than 6 times power pool redundancy to support to most critical surge current requirement. They are magnet shielded in the compartment underneath the motherboard. The most advanced lowest noise LDO regulators are employed. In addition, more than 50000uf of total filtering caps are onboard. All of these deliver the highest standard of power performance once found only in leading edge lab equipment. Technology MP-D2 is powered by latest XMOS U8 asynchronous USB chip and 2x AKM flagship VERITA AK4490 32bit DAC chips. XMOS Incorporated with three super high precision TCXO clocks deliver lowest jitter performance. Dual AK4490 in mono block configuration and custom voltage setting deliver 126db dynamic range performance. MP-D2 supports PCM up to 384Khz and DSD64, DSD128, and DSD256. Analog Output Stage - Tubes and Caps MP-D2 output stage only employs vacuum tubes. No solid state component, zero feedback and fully balanced circuitry. Tube rectification circuit delivers more analog sounding. The unique design of the MP-D2 supports multiple series of signal and rectifier tubes. It is also the first one in the world offering user changeable output stage coupling capacitors. No soldering is required! You owns the freedom to select the tubes and caps. You have never felt anything like it. Exterior The full chassis is built with aluminum alloy. Even the legs, knobs, tube protection rings and buttons are made with solid aluminum alloy. The simplicity of front panel design allows you get used to it in minutes. How it sound in General? Extremely dynamic, vivid and detailed sounding. Excellent bass weight and extension. Smooth, liquid and airy mid-range and high. Deep and wide sound-stage. Features and Specs Asynchronous transfer mode for dual USB input. DSD and PCM input over USB. USB and clock isolation. Short delay sharp roll off 50Khz digital filter. AES, Optical, Coaxial digital inputs. Zero-feedback, fully-balanced full tube circuitry. Selectable low gain and high gain output. Power-line RFI filter. Pre-amp output feature (10V Max) Tube Rectification Signal tubes - 6.3V series: 6N11 (stock), 6H6, 6H30, E88CC, E188CC6922, 6DJ8. 12.6V series: 12AU7, 12BH7, E80CC. Rectifier tubes - 6.3V series: 6Z5P (stock), 6X5. 5V series: 5R4, 5AR4, 5U4G, 5Y3, GZ34 Frequency Response DC to 50khz DR / SN 126 dB Output Level 6 volts balanced XLR, 3 volts single-ended RCA Input 2x USB PCM 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz, (384kHz only in Mac and Linux). DSD64, DSD128, (DSD256 AK4490 & AK4497) 1x Coax, 1x AES, 1x Optical PCM 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz Dimensions W 34.5cm x D 38cm x H 15cm Gross Weight 12.5 kg