Pro-Ject Audio Systems Head Box S3 B variant 1

Pro-Ject Audio Systems Head Box S3 B variant 2

Pro-Ject Audio Systems Head Box S3 B

Name: Pro-Ject Audio Systems Head Box S3 B
Brand: Pro-Ject Audio Systems
SKU: head-box-s3-b

View at Pro-Ject Audio Systems

Balanced Headphone Output

XLR Input

Balanced Output

Gain Switching

Fully balanced headphone amplifier

Unique fully balanced amp topology
Up to 820mW output power
Fully balanced signal chain
Balanced headphone outputs
Premium full aluminium casework
Made in Europe

Built to Perform Built to Last.

The 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.

Available in silver or black, the Head Box S3 B is made in Europe, reflecting a commitment to precise manufacturing, long-term reliability, and high engineering standards.

Fully Balanced Power

Technically, the Head Box S3 B features a fully balanced signal chain for both RCA and XLR inputs, ensuring maximum channel separation and minimal noise.

Its power stage is realized with two TPA6120A2 amplifier chips, delivering up to 820 mW of fully balanced output power.

Balanced headphone connections are available via 4.4 mm Pentaconn and XLR outputs, while single-ended headphones are supported through 3.5 mm and 6.3 mm outputs. A bypass RCA loop output allows easy connection to an additional amplifier or further system expansion.