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Estimated price (community-sourced)
Around — community and catalog average, updates slowly
The Pro-Ject Head Box S is a high-quality headphone amplifier designed for audiophiles, capable of driving headphones with both low and high impedance. It features a full metal housing for protection against interference and includes a 6.3mm (1/4") stereo headphone output. The amplifier delivers 330mW at 30 ohms and 60mW at 300 ohms, with a very low distortion of 0.003% and a wide frequency response from 30Hz to 20kHz (-0.05dB), extending up to 120kHz (-1dB). It has a gain of 11dB and a signal-to-noise ratio of 112dB (A weighted) at full output. The unit includes one pair of RCA line-level inputs and outputs, allowing flexible integration into audio systems. The Head Box S is powered by an external 18V/500mA DC power supply (Power Box S), which ensures stable and clean power delivery. The power consumption is 100mA DC during operation and less than 1W in standby mode. The unit is controlled via a standby push button with a blue LED indicator. This combination offers excellent sound quality and versatility for headphone listening setups.
Analog signal output specifications
Input and output connections
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions
Components that show up alongside the Head Box S with Power Box S in real systems. A verdict means the pair has been checked for compatibility and headroom — open it to see how the two get along.
The closest alternatives on specs, description and the systems they turn up in, with the specs they share set side by side.
The PH1's low-frequency extension is 20 Hz against the Head Box S with Power Box S's 30 Hz, its signal-to-noise 84 dB against 112 dB, and its thd 0.008% against 0.003%. Both share high-frequency extension (20 kHz).
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