Pro-Ject Head Box DS

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Head Box DS is a high-end headphone amplifier with a USB input and built-in D/A converter. Having this feature set provides the ability for direct connection of digital sources to the Head Box DS for headphone listening. Additionally, an analog output allows the unit to function as a D/A converter for the same input sources when connected directly to a preamplifier. The USB input is a 24-bit/96kHz asynchronous design delivering superb sound quality from a computer audio source. Additional digital inputs include a coaxial RCA and Toslink optical that can be used to connect to, for example, a digital output of a CD Player. The dual mono amplifier topology employed uses very high quality component parts including ultra low-noise ICs and high-reliable relay switches. All controls are located on the front panel for ease of use and the Head Box DS features a large and legible LCD readout. An outboard power supply is included and in 2013 an optional rechargeable DC supply will be made available.


  • Power Output: 350mW/30ohms, 60mW/300ohms
  • Headphone Connection: > 30 ohms
  • Signal to Noise: 112dB (A weighted) at full output
  • Frequency Response: 20Hz - 20kHz/-0.5dB
  • THD: 0.0014%
  • Gain: 9dB
  • Headphone Jack: 3-pole 1-4" (6,3mm Æ) Co-axial JackLine-Level Input1 pair RCA Jacks
  • Line-Level Output: 1 pair RCA Jacks
  • A/D Converter: Cirrus Logic CS4344. 24Bit/192kHz. Delta Sigma D/A
  • Supported Audio Format: PCM (LPCM). No support for multi channel formats like Dolby® AC-3 or DTS
  • Sampling Rates USB Input: 44.1kHz and 48kHz
  • Optical Input: 44.1kHz, 48kHz, 88.2kHz and 96kHz
  • Coaxial Input: 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz and 192kHz
  • USB Input: 5 Pin Mini B Connector, USB cable supplied
  • USB Signal: Digital Serial Data Protocol USB 2.0
  • Operating Systems: Windows XP®, Windows VISTA®, Windows 7® and Mac OS®Power Supply18V/1,000mA DC
  • Power Consumption: 500mA DC, <1W in standby
  • Dimensions (W x H x D): 4.1 x 2.9 x 5.7 in.,103 x 72 x 144 mm
  • Weight: 2lbs., 990g without power supply
  • Finish: Black or Silver

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