Which of the following is a characteristic of the S6000?

The S6000 is well-known for its versatility and capability to create complex effects, which is a significant characteristic. This means that users can manipulate and customize various parameters and settings within the unit to produce a wide range of audio effects suitable for different applications. This flexibility allows sound engineers and music producers to innovate and tailor their sound precisely to their needs, whether in a studio or live setting.

The other options do not accurately reflect the capabilities of the S6000. It is not limited to operating only as an analog unit, as it features digital processing capabilities. Additionally, it is designed for both studio and live environments, making it unsuitable to claim it is only for studio use. Lastly, the interface of the S6000 is highly configurable, allowing users to adapt the setup to their specific requirements.