Pro-Ject Headbox S2 black front over white background
Pro-Ject Headbox S2 silver front over white background

Pro-Ject Head Box S2 | Headphone Amp

Regular price$189.00


Pro-Ject Logo

Head Box S2 Let's You Keep That Pro-Ject Excellence All to Yourself

  • 725mW at 32Ω powers a broad range of headphones via 6.3mm or 3.5mm outputs
  • RCA bypass lets you slip it in your stack between the Phono Stage and Power Amp, and easily switch between speakers and headphones.
  • Incredible sound performance for the price.
  • Handmade in Europe

Simplicity and Power 

When it comes to delivering high-class sound through the output of modern devices such as laptops & smartphones, Head Box S2 is here to help. Many products in its class don’t have enough power to reveal the maximum potential of modern headphones. Head Box S2’s 725mW output power will deliver crisp, clean & musical sonics with sufficient volume for even those who like to crank it. The source of your choosing can be fed to the gold-plated RCA jacks at the rear. On the front are two headphone jacks (1/4″ & 1/8″) that can be used simultaneously for shared listening experiences.

Sound-first components are used throughout so you can rest assured you’re getting the best performance for you dollar. The aluminum/steel enclosure helps to protect the circuitry from electromagnetic interference and vibration, further reducing unwanted noise. Its versatility, power, and sonic performance make Head Box S2 is an absolute audiophile bargain that’s within reach for any listener with a critical ear.



  • Weight: 0.365 kg
  • Dimensions: 12 × 10.3 × 3.7 cm


  • Output power: 725mW (into 32Ω)
  • Signal to noise ratio: -110dBV
  • THD +N: < 0.002%
  • Gain: 11dB
  • Crosstalk: 68dB
  • Frequency response: 20Hz – 80kHz (+- 0.2dB)
  • Analogue inputs: 1 pair RCA
  • Headphone output: (x1) 6.3mm | (x1) 3.5mm
  • Headphone impedance: 8 – 600Ω
  • Output impedance: < 1Ω
  • Analog loop out: 1 pair RCA
  • Power supply: 5V/0.5A DC
  • Standby power consumption: <0.5W

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