Pro-Ject Audio Head Box S3 B - Headphone AmplifierThe Head Box S3 B is a high performance headphone amplifier built around a unique, fully balanced topology that redefines what is possible in its price class. Designed for audiophiles who demand surgical clarity, precision, and flexibility, it supports both balanced and single ended headphones and integrates seamlessly into modern desktop and hi fi systems. Designed with the overarching goal to find the perfect balance between output power and