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Head Box DS

Performance audiophile headphone amplifier



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


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 (WHD)
4.1 x 2.9 x 5.7 in.,103 x 72 x 144 mm

2lbs., 990g without power supply

Black or Silver