Pure DSD, Reference Digital to Analog converter with tube output stage


The DSD-Master Reference is our top-line Digital to Analog converter, specifically made for the most enthusiastic audiophiles who prefer true analog sound, comparable to state of the art vinyl.
It is an all-hand-made boutique, designed and built with the best possible audio quality in mind, cost-no-object.
Inspired by reference vinyl sound quality, the DSD-MR pleases with a very natural sonic character that is truly unique.
From the quadruple DSD processing rate, to the differential Class-A tube output stage, the DSD-MR proves technology and refinement of the highest level.
The DSD-MR is based on a modular design, allowing a cost-effective future upgradability of any internal stage.

Digital Processing

  • Proprietary asynchronous USB input module accepting PCM from 44.1kHz/16bit up to 384kHz/32 bit, as well as DSD64 and DSD128.
  • Proprietary PCM to DSD converter module with DSD128 and DSD256 capabilities, user selectable from the remote control.
  • Proprietary 64 bit User Selectable Digital Filters for PCM processing – Slow, Normal and Zero/Non-oversampling.
  • Proprietary Pure DSD Digital to Analog conversion module. No off-the-shelf devices.
  • Ultra-low-jitter Femto Master Clocks.
  • Proprietary 10 pin RJ-45 input for connecting our DTR-MR transport.

Analog Output Stage

  • Custom Lundahl output transformers with Oxygen Free Copper windings.
  • Pure Class-A, Differential tube stage featuring the vintage E182CC tubes.
  • Entirely passive current to voltage conversion and DSD analog filtering.
  • Zero Negative Feedback.
  • Non-magnetic resistors.
  • No capacitors on the signal path.
  • No Op Amps.
  • No mechanical contacts on the signal path.
  • Solid core Oxygen Free Copper internal wiring.

Power Supply

  • Oversized Custom P-Core balanced main power transformer.
  • Optically controlled, mechanical-contacts-free devices for main power switching control.
  • Delayed High-Voltage supply, after tubes warm-up, for increased tubes life.
  • High quality Lundahl choke for tube power supply.
  • High grade, specially selected rectifiers and passive components.

Convenience and mechanical

  • Large FLD display.
  • Custom selectable color filters for the display. Rose, Blue and Green. Please specify when ordering.
  • Microprocessor control with last settings memory.
  • Aluminum Infrared Remote Control capable of controlling DTR-MR, DSD-MR and HAS-MR.
  • All-Aluminum enclosure with machined 20 millimeters thick front panel.


2-years warranty/6-months for the tubes with an available 3-year warranty extension, with an online product registration, excluding the tubes

Please visit http://aplhifi.com/register/

Digital Inputs

  • Two S/PDIF Coaxial digital inputs with WBT NextGen true 75 Ohms Gold plated RCA connectors.
  • AES/EBU professional standard balanced digital input with Gold plated Neutrik connector.
  • Note! S/PDIF and AES/EBU accepting up to 192kHz/24bit PCM.
  • TOSLINK Optical digital input.
  • USB input accepting PCM from 44.1kHz to 384kHz as well as DSD64 and DSD128 in DoP format.
  • Note! All PCM rates from S/PDIF, AES/EBU, Optical and USB inputs are converted to DSD128 or DSD256, user selectable.
  • DTR input uses proprietary encrypted DSD, as well as PCM via balanced LVDS transmission, similar to I2S.

Analog Outputs

  • Single Ended RCA outputs with top-line Furutech Rhodium plated RCA connectors.
  • Balanced XLR outputs with top-line Furutech Rhodium plated connectors.
  • Note! RCA and XLR outputs cannot be used simultaneously. Please select RCA or XLR from switch on the back.
  • Output level – 2.3V RMS at 0dBFS.
  • Output impedance – approximately 20 Ohms.

Power input and fuses

  • IEC power inlet made by Furutech NCF series.
  • 115V or 230V / 50-60Hz, factory pre-set.
  • Other power input voltages available on request.
  • 0.1A fuse for standby power supply.
  • 2A special Gold fuse by AMR for main power supply.

Dimensions and weight

  • W450 x H120 x D380 millimeters.
  • Height with feet included – 140 millimeters.
  • Weight – 24.5kg unpacked.
  • Included Accessories
  • Special power cable of our design.
  • Infrared Remote Control capable of controlling DTR-MR, DSD-MR and HAS-MR.
  • User Manual.

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