Pro-Ject Head Box S2 headphone amplifier

The Pro-Ject Head Box S2 is a very compact headphone amplifier that still packs a punch. With both 3.5mm and 6.35mm sockets and a high 725mW output power it can even drive two headphones at once if required.

It has RCA inputs and RCA loop outputs (so that you can link other items after without the headphone amplifiers volume control having any influence) and a 'wall wart' external power supply.

Specifications
Headphone Output 3.5mm Mini Jack + 6.3mm Jack
Headphone Amp Output Power 725mW (32Ohm)
Headphone Amp Signal-to-Noise Ratio -110 dB
Headphone Amp THD 0.002 %
Headphone Amp Frequency Response 20 - 80,000Hx (+\- 0.02dB)
Headphone Amp Gain 11 dB
Fixed Analogue Output(s) 1 x RCA Pair
External Power Supply Rating 5V-500mA DC
Dimensions (W x H x D) 103 x 37 x 120 mm
Weight 0.365 kg