Pro-Ject Pre Box S2 Digital Preamplifier

$499.00 OR

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Model: 9120065186400 UPC: 844682008851 Item: 2683

Product Information

A Performance Revolution in a Small Package! 

The Pre Box S2 Digital marks a new era for Pro-Ject's S-series components; for the very first time they are using a dual mono configuration with the highest class D/A converters of ESS Sabre, whose flagship DAC chip ensures highest class audio in a small and affordable pack-age. This DAC is capable of high resolution audio up to 32bit 768kHz PCM and DSD512.

The Pre Box S2 Digital is also the very first of Pro-Ject's devices to support hardware MQA unfolding via USB. It’s also the premiere of the manufacturer's proprietary Optimum transient digital filter and the proprietary clock circuitry design. With organic polymer capacitors and thin film miniMELF resistors, Pro-Ject was able to create a tiny device that will blow away even much bigger components for a much higher price. With a total of seven digital filters the sound can be shaped precisely to the listeners liking. The Pre Box S2 Digital is fully remoteable, it can also control the playback software of a computer. You can use Play, Pause, Forward, and Rewind straight with your Pre Box S2 Digital! 


  • Dual mono construction
  • High end ESS Sabre ESS9038 dual DAC
  • Proprietary clock circuitry design
  • Organic polymer capacitors and thin film miniMELF resistors
  • MQA hardware decoding (USB only)
  • DSD64, DSD128, DSD256 & DSD512 (DSD over PCM)
  • Up to 24bit/192kHz for optical & coax inputs
  • 7 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



  • 3 digital inputs
    • 1x coax (S/PDIF)
    • 1x optical (TOSlink)
    • USB B
  • D/A-converter
    • 2x ESS9038Q2M 32-bit PCM 768kHz/DSD512
  • Headphone amplifier chip: ESS9602
  • Sampling rates: 32/44.1/48/88.2/96/176.2/182/352.8/384/768kHz
  • DSD support: DSD64, DSD128, DSD256, and DSD512
  • MQA support
  • Filter settings: 7 different selectable on front
  • Frequency response: 20Hz - 20kHz
  • Analogue out: 6.3mm headphone out (front), 1x variable out (RCA)
  • Output voltage: 2.05 Veff
  • Headphone output power: 68mW (32 ohms)
  • THD: 0.0003%
  • Dynamic range: 124dBA
  • Power consumption: 5V micro USB
  • Dimensions (W x H x D): 4.05" x 1.41" x 4.05"
  • Weight: 1.32 lbs.

What's in the Box

What's in the Box:

  • Pre Box S2 Digital Preamplifier
  • AC adapter
  • 3 AC plug adapters (US/EU/UK)
  • Wireless remote control
  • CR2032 Coin cell battery (for remote)
  • CD with USB driver
  • Instructions for Use


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Does it come with a remote control?
A shopper on Jan 1, 2022
  Thanks for your question. The Pre Box S2 includes a remote control and CD with USB driver.
Can I connect a Android tablet to this?
Kenneth M on Feb 16, 2020
  Thanks for your question. The Pre Box S2 has 3 digital inputs: 1 x coax (S/PDIF), 1 X optical (TOSlink), and USB B.