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Arrow left Pro-Ject Audio

Pro-Ject Head Box S2 Digital Black Headphone Amplifier

Pro-Ject Audio

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Brand-new, unused, unopened and undamaged item in original retail packaging (where applicable).


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The Head Box S2 Digital takes the advanced digital design of the DAC Box S2+ but adds headphone support to the outputs for added convenience.

With support for PCM files up-to 32-bit / 768kHz and quad-DSD decoding (DSD256) via the rear-mounted USB port, there's very little this compact device can't handle with ease. The clever internal design means unwanted noise entering the system via USB is double-filtered to suppress it to insignificantly low levels. Fully Hi-Res Audio certified and Roon Tested, the Head Box S2 Digital is a DAC that's more than comfortable in far more expensive audio systems. 

For alternative digital sources, the Head Box S2 Digital also has an optical input and coaxial S/PDIF input (both limited to 24-bit/192kHz conversion), so nothing should be out of reach - whether you're looking to connect CD players, network streamers or a computer. 

Regardless of the input used, Pro-Ject's proprietary Optimum Transient Digital Filter and complimentary clock circuitry design allows the Head Box S2 Digital to manage jitter down as low as 100 Femtoseconds, ensuring the tightest and most capable audio performance possible. The sound can then be tailored to suit any listener's preference thanks to the other four digital filters included with the ESS Sabre ESS9038Pro DAC chip.

The internal layout of the Head Box S2 Digital borrows further from the Pre Box S2 Digital design to ensure the best possible performance. Through the clever use of polymer capacitors and thin-film miniMELF resistors it is possible to fit all this technology into such a small chassis. Elsewhere, industry-first innovations in the dual-regulator architecture makes sure the sound performance does justice to the true high-end formats you can play through the DAC. 

The Head Box S2 Digital's front-seated 6.35mm headphone output delivers a clean and precise sound with a musical touch. The rear-mounted RCA outputs are a fixed Line Level output for easy connection to an existing amplifier - turning the Head Box S2 Digital into both a full system DAC and a high-quality headphone amplifier 

Power is provided by the included power supply, but you can upgrade your convenience further by switching to any 5V power bank. Housed within the improved S2 chassis, the overall build, feature list and performance of the Head Box S2 Digital is enviable for the price.

  • Tick High-end ESS Sabre ESS9038 DAC
  • Tick Proprietary clock circuitry design
  • Tick Organic polymer capacitors and thin-film miniMELF resistors
  • Tick 32-bit / 768kHz PCM support
  • Tick Up-to DSD256 (DSD over PCM) support
  • Tick Up-to 24-bit / 192kHz support for optical & coax inputs
  • Tick Five selectable digital filter characteristics
  • Tick One filter is proprietary optimum transient digital filter
  • Tick Synchronisation of all internal oscillators
  • Tick Jitter as low as 100 Femtoseconds
  • Tick Front-mounted high-quality headphone output
  • Tick Fixed level RCA outputs for connection to an amplifier
  • Tick Gold plated four layer PCB
  • Tick Premium S2 chassis

While we do our best to keep this information up to date, please be aware that all specifications are subject to change by the manufacturer at any time.

DAC 1x ESS9038Q2M 32-bit PCM 768kHz / DSD256
Digital Inputs 1x Coax (S/PDIF)
2x Optical (TOSlink®)
1x USB B
Headphone Amp Chip ESS9063
Sampling Rates 32kHz
DSD Support DSD64
Filter Settings 5x Selectable
Frequency Response 20Hz - 20kHz
THD 0.0007%
Analogue Outputs 1x Headphone (6.35mm Jack)
1x Pre Out (RCA)
Dynamic Range 120dBA
Output Voltage 2.05 Veff
Power Consumption 5V. Micro USB
Dimensions 103 x 37 x 120mm
Weight 366g (Without PSU)

While we do our best to keep this information up to date, please be aware that all specifications are subject to change by the manufacturer at any time.

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This item is special order and will required additional time to dispatch.

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When in stock:

This item is available dispatch Monday to Friday, subject to cut-off times and excluding public holidays. Next working day and weekend deliveries available.

Delivery is available to most addresses within the United Kingdom. Some services may not be available to all postcodes. More information is available at the basket and on our delivery page.

We do not dispatch orders to addresses outside of the United Kingdom.

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