Pro-Ject Pre Box S2 Digital


  • Digital inputs: 1x USB (B)
  • 1x Co-axial (RCA)
  • 1x Optical (TOSLink)
  • D/A-converter: 2x ESS9038Q2M 32-bit
  • Playback formats USB: up to DSD512 (DSD1024), PCM up to 32b/768kHz
  • Optical: PCM up to 24b/192kHz
  • Coaxial: PCM up to 24b/192kHz
  • Filter settings: 7 different selectable on front
  • Frequency response: 20Hz – 20kHz
  • Analogue outputs: 6.3mm Headphone (front), 1x Variable Out (RCA)
  • Output voltage: 2,05 V
  • Minimal recommended headphone impedance: 8ohms
  • Headphone output power: 6,6mW/600ohms, 68mW/32ohms
  • THD: 0,0003% at 0dB, 2V RMS, 1kHz
  • Dynamic range: 124dBA
  • Outboard power supply: 5V/1A DC (included)
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Pro-Ject DAC

The Pro-Ject Pre Box S2 Digital features dual-mono configuration with the highest class D/A converters by Sabre. As a result, their ESS9038 DAC chips ensure audiophile-grade sound.  Consequently, Pro-Ject’s compact, affordable design is capable of high-resolution audio up to 32bit/768kHz PCM and DSD512. Most important, it is among the first of our devices to support hardware MQA unfolding via USB.  It also features our proprietary ‘optimal transients’ digital filter and our proprietary clock circuitry design.

That is to say, with the Pro-Ject Pre Box S2 Digital’s proprietary clock design, we have managed unrivaled jitter rates of 100 Femtoseconds. As a result, this easily outperforms many renowned and respected audiophile clock generators. Therefore, with organic polymer capacitors and thin-film mini-MELF resistors, we were able to create a tiny device that screams value in terms of sonic performance. Consequently, with a total of seven digital filters, sonics can be adjusted based on your preferences.

Pro-Ject Pre Box S2 Digital Features

  • Dual mono construction
  • High end ESS Sabre ESS9038 dual DACs
  • Proprietary clock circuity design
  • Organic polymer capacitors and thin film mini-MELF resistors
  • MQA hardware decoding
  • DSD64, DSD128, DSD256 & DSD512 (DoP, DSD512 native)
  • Up to 24bit/192kHz for optical & coax inputs
  • 8 selectable digital filter characteristics
  • 1 proprietary optimum transient digital filter
  • Headphone output on the front (6.3mm)
  • Synchronization of all internal oscillators
  • Jitter as low as 100 Femtoseconds
  • Gold plated four layer PCB
  • Full aluminum/metal sandwich casing in silver or black

The Pro-Ject Pre Box S2 Digital is handmade in Europe

Additional information