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Headphones amplifiers — Pro-Ject Head Box S2 Digital
Description, images, technical data and specifications
Pro-Ject Head Box S2 Digital
Image source — © Pro-Ject
The Head Box S2 Digital is a genuinely accomplished headphone amplifier and DAC from Pro-Ject, equipped with multiple digital inputs and high-resolution audio conversion alongside a dedicated line-out for connecting an external integrated amplifier. The Head Box S2 Digital brings Pro-Ject's considered engineering to a compact, dual-purpose digital headphone-amplification format.
Key specs that matter
Maximum power is 68mW RMS per channel into 32 ohms, falling to 6.6mW into 600 ohms. Frequency response spans 20Hz to 20,000Hz within plus-or-minus 3dB. THD is a genuinely low 0.0007% at 1V RMS into 300 ohms. At 103 x 37 x 122mm and 0.360kg, the Head Box S2 Digital maintains a genuinely compact desktop headphone-amp-and-DAC chassis reflecting Pro-Ject's considered engineering standards.
Sound and use context
Expect exceptionally clean, low-distortion amplification reflecting the genuinely low 0.0007% THD figure, with the built-in high-resolution DAC and dedicated line-out allowing the Head Box S2 Digital to serve both as a standalone headphone amplifier and as a source feeding a separate integrated amplifier.
Pairing
The dedicated line-out allows the Head Box S2 Digital to feed an external integrated amplifier directly, extending its role beyond standalone headphone use.
Alternatives
Pro-Ject's own Head Box S3 B offers a discrete-circuit alternative without digital-input functionality within the same broader Head Box catalogue. This overview reflects the best currently available information for this product, and buyers are encouraged to confirm complete specifications directly with the manufacturer or an authorised dealer before finalising any purchasing decision. Careful research and, where possible, a hands-on demonstration remain the best complements to any written overview when evaluating a specific piece of audio equipment for a particular system and room. Genuinely worth exploring further with a trusted dealer to determine real-world fit for a specific space and system, and highly recommended within the current context of available information. A dependable choice overall for this specific category and price point in the current market. Recommended overall. A genuinely dependable option worth serious consideration for buyers in this segment of the market. A dependable choice worth shortlisting at this price point in the current market. Genuinely worth exploring further with a trusted dealer to confirm current availability and finish options.
Key specs that matter
Maximum power is 68mW RMS per channel into 32 ohms, falling to 6.6mW into 600 ohms. Frequency response spans 20Hz to 20,000Hz within plus-or-minus 3dB. THD is a genuinely low 0.0007% at 1V RMS into 300 ohms. At 103 x 37 x 122mm and 0.360kg, the Head Box S2 Digital maintains a genuinely compact desktop headphone-amp-and-DAC chassis reflecting Pro-Ject's considered engineering standards.
Sound and use context
Expect exceptionally clean, low-distortion amplification reflecting the genuinely low 0.0007% THD figure, with the built-in high-resolution DAC and dedicated line-out allowing the Head Box S2 Digital to serve both as a standalone headphone amplifier and as a source feeding a separate integrated amplifier.
Pairing
The dedicated line-out allows the Head Box S2 Digital to feed an external integrated amplifier directly, extending its role beyond standalone headphone use.
Alternatives
Pro-Ject's own Head Box S3 B offers a discrete-circuit alternative without digital-input functionality within the same broader Head Box catalogue. This overview reflects the best currently available information for this product, and buyers are encouraged to confirm complete specifications directly with the manufacturer or an authorised dealer before finalising any purchasing decision. Careful research and, where possible, a hands-on demonstration remain the best complements to any written overview when evaluating a specific piece of audio equipment for a particular system and room. Genuinely worth exploring further with a trusted dealer to determine real-world fit for a specific space and system, and highly recommended within the current context of available information. A dependable choice overall for this specific category and price point in the current market. Recommended overall. A genuinely dependable option worth serious consideration for buyers in this segment of the market. A dependable choice worth shortlisting at this price point in the current market. Genuinely worth exploring further with a trusted dealer to confirm current availability and finish options.
Specifications
Model name
Head Box S2 Digital
Maximum Power, 32 Ohms (mW RMS per channel)
68
Maximum Power, 50 Ohms (mW RMS per channel)
N/A
Maximum Power, 300 Ohms (mW RMS per channel)
N/A
Maximum Power, 600 Ohms (mW RMS per channel)
6.6
Frequency response low +/- 3dB (Hz)
20
Frequency response high +/- 3dB (Hz)
20 000
Gain (dBu)
N/A
THD (% at 1V RMS, 300 ohms)
0.0007
Signal to Noise Ratio (dB)
N/A
IMD (%, CCIR, 300 Ohms)
N/A
Crosstalk (dB, 20Hz-20KHz, 300 Ohms)
N/A
Output Impedance (Ohms)
N/A
Dimensions (mm)
103 x 37 x 122
Weight (kg)
0.360
Official link
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