DAC One - front view

DAC One

DAC One

Digital section

  • DAC One - AKM AK4495 DAC chip (1 channel)Two AKM AK4495 digital-to-analogue converters operating in mono mode, each in the “dual balanced” configuration (4 signals per channel).
  • DACs are clocked from an external, differential Master Clock (MCLK) with extremely low phase noise (total jitter <1ps R.M.S).
  • The MCLK synthesized but not reproduced from the SPDIF/USB signal as in competitive devices.
  • The input signal is not digitally filtered from input to the output. DAC  uses unaltered every bit of information provided to the input (“bit perfect”).
  • Ultra low jitter clock generator SI570DAC One is compatible with SPDIF and USB (USB Audio Class 2.0) data formats PCM from 16bit/44.1kHz to 24bit/384kHz and DSD from x64 to x128 (SPDIF signal is limited to PCM 32bit/192kHz and DSD 64x encoded as DoP).
  • Six switchable inputs: USB 2.0, 2 x SPDIF, 2 x TOSLINK and AES/EBU.
  • Separate DAC board assembly for easy exchange/upgrade.
  • The power supply is based on 4 discrete and 12 integrated circuit regulators.
  • Dedicated transformer with separated windings; one for the DSP digital part and the other for DAC.
  • Amtrans AMRGVolume control in the range from 0dB to -127dB,
  • Optionally DAC One can be equipped with hybrid volume attenuator using Amtrans AMRG and Vishay Dale resistors. With this module you can connect DAC One directly to the Power Amplifier.
  • Infrared remote control.

Casing

  • DAC One - front viewVibration damping casing made of rigid steel sheet with double thickness sides.
  • Aluminum front panel with a thickness of 10 mm (available in different finishes and colors).
  • Floating, internal chassis soundproofed.
  • Neutrik connectors with silver-coated contacts.

Analog section (tube version)

  • NOS Jan Phillips 5963 tubes (ECC82 compatible)The analog stage contains 6 differential amplifiers. Two pairs for balanced output and third pair for unbalanced signal, which is product of balanced signal.
  • NOS Philips 5963 tubes (ECC82  type), selected after many hours of listening sessions.
  • Working point of tubes fixed with lithium cells (guaranteed durability 10 years).
  • Six passive anode power supplies and one discrete DC filament power supply were used.
  • Highest quality components (Amtrans, Jantzen, Cornell Dubilier, Elna, Nichicon, WIMA, Vishay), silver coated copper signal wires in PTFE casing.
  • The final sound shaped by many hours of listening.

Analog section (solid state version)

  • DAC One - analog stage componentsThe analog stage contains 6 differential amplifiers. Two pairs for balanced output and third pair for unbalanced signal, which is product of balanced signal.
  • A fully balanced and symmetrical circuit, including symmetrical, shallow, negative feedback.
  • The final stage working in Class A with the use of Toshiba audio transistors.
  • No capacitors in the signal path, both on input and output.
  • A fully complementary discrete amplifier with symmetrical power supply and paired transistors.
  • Dual mono power supply system comprising two independent transformers and 4 discrete analog power supplies.
  • Highest quality components (Amtrans, Jantzen, Cornell Dubilier, Elna, Nichicon, WIMA, Vishay), silver coated copper signal wires in PTFE casing.
  • The final sound shaped by many hours of listening.

Analog section (dual)

  • Tube PSU and module with Phillips Jan 5963Joins advantages of solid state and tube version (except of balanced XLR outputs).
  • The analog stage contains 1 tube and 1 solid state module per channel.
  • Two RCA outputs per channel are available, one switchable between solid state and tube and one fixed to solid state.

Awards

„High Fidelity” Magazine

Best Product Award 2018
Digital to Analog Converter
RT-Project DAC One

Orders and price list

DAC One can be ordered via this webpage.

Drivers and support

Drivers for DAC One can be downloaded from this webpage.