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Pro-Ject (Project) Box Design Head Box S2 Digital Headphone Amplifier

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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.

Key Features:

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

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 insiginficantly 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.

Technical Specifications:

  • 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 / 44.1kHz / 48kHz / 88.2kHz / 96kHz / 176.2kHz / 192kHz / 352.8kHz / 384kHz / 768kHz
  • DSD Support: DSD64 / DSD128 / DSD256
  • 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)

We endeavour to despatch same day for orders placed up to 2pm on available stock items (items with stock message "Usually dispatched within 24 hours"). Please remember to check with us first for a physical stock check if next day delivery is important to you. Any items with stock message "Usually dispatched within 72 hours" are items that we do not hold in stock but order in from the importer or manufacturer as soon as a customer order is recieved. Occasionally these may be delayed beyond 72 hours due to importer/manufacturer stock levels but we will inform you as soon as we can if this is the case.

UK ORDERS:  We despatch the bulk of our UK mainland items on a 24 hour service – Free of Charge.  Non Mainland locations - Isle of Man, Isle of Wight, the Scilly Isles, the Scottish highlands and Islands, the Channel Islands and Northern Ireland may take a day or so longer and are not Free of Charge. Smaller items are delivered using Royal Mail recorded delivery or special delivery. Larger items are delivered using a courier service such as Interlink Express, DPD, UPS or DHL. 

INTERNATIONAL ORDERS: We offer competitive rates which can be confirmed by email. Please just ask – we will need a full delivery address and telephone number. Smaller items are delivered using Royal Mail Small Packets Airmail with International Tracked and/or Signed depending on value of item and availability of the service. Larger International shipments are sent by insured and tracked services using DPD, DHL or UPS. If there are any delays due to specific customs regulations, etc, you will be contacted by Turntableworld or by the courier with a request for any further information required. Customs duties do not apply for shipments into any EU country (for a full list please refer to the EU Country List). Customs duties can apply for countries outside of the EU. Customers in these countries are responsible for all taxes and duties incurred when the items enter their country.

COLLECT IN STORE OR HOME INSTALL:At the request of the manufacturer some items cannot be supplied by mail order but you can click and buy them and then elect to collect them from our store or arrange a home install (if applicable). Applicable items clearly state that they are Collect in store or home install. Once ordered you will receive a message prompting you to contact us by phone or email to arrange for us to deliver and install or to reserve and collect from our store at your convenience, you will also be advised of the delivery time / stock availability as not all Home install / collect in store items are held in stock. 

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