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Pro-Ject DAC Box DS2 Ultra - Digital / Analogue Converter


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The advanced Pro-Ject DAC Box DS2 Ultra is an universal and very flexible D/A converter of the highest class. It offers full DSD256 support and upsampling of all input signals to 768kHz from USB, coaxial and optical inputs. This realizes high-resolution sound playback with a rich sound field and bass representation with less distortion.

Due to its class-leading audio performance the DAC Box DS2 ultra is an ultimate high end bargain.


  • Top grade AK4490 D/A chip (32-bit PCM 768kHz / DSD256)
  • 6 Inputs: 1x USB, 3x optical (TOSlink®), 2x coax (S/PDIF)
  • Up to 32bit/768kHz asynchronous USB (XMOS technology)
  • DSD64, DSD128 & DSD256 (DSD over PCM)
  • Audio Class 2 (USB 2.0 High Speed) driver for Windows included
  • Up to 24bit/192kHz for optical & coax inputs
  • 5 selectable digital filter characteristics
  • 3 selectable sound modes
  • High-end ultra low phase oscillator with superior noise rejection
  • RCA line level solid-state analogue output stage
  • Ultra linear & ultra low noise circuitry
  • Separate power supplies for every stage with advanced filter technology
  • Upgradeable with optional linear power supply

Technical Specifications

  • D/A-converter: AK4490 32-bit PCM 768kHz / DSD256
  • Sampling rate converter: AK4137EQ upsampling to 768kHz
  • Sampling rates: USB: up to 32bit/768kHz, DSD256 (DoP), Coaxial: up to 24bit/192kHz, Optical: up to 24bit/192kHz
  • DSD-support: DSD64, DSD128 and DSD256
  • Filter settings: 5 different selectable on front
  • Digital inputs: USB B, 3 x Optical (TOSlink®), 2 x Coaxial (S/PDIF)
  • Frequency response: 20Hz - 50kHz (+0/-1dB)
  • Analogue output: RCA/Cinch (Line)
  • Output voltage: 2.2 V (switchable +6 dB gain gives 4.4 V )
  • Digital output: Optical (TOSlink®)
  • THD: 0.00085%
  • Crosstalk: -117 dB (10kHz@0dB)
  • Signal to Noise Ratio: 113 dB (20Hz - 20kHz)
  • Power consumption: <1 Watt standby, 600mA max
  • Power supply: 18V/1000mA DC (included)
  • Dimensions W x H x D: 206 x 71 x 220 mm (Alu), 240 x 72 x 220 mm (Wood), incl. sockets
  • Weight: 1410 g (Alu), 1880 g (Wood), without power supply

Further Information

Pro-Ject DAC Box DS2 Ultra - Digital / Analogue Converter - User Manual

Pro-Ject DAC Box DS2 Ultra - Digital / Analogue Converter - Product Information

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