UNiKA PRO Stage Series provides direct boxes for tough everyday use in the studio and on stage. The series encompasses mono DI SDI-1, its two-channel sibling SDI-2 and the equally two-channel isolator ISO-2, which provides effective galvanic separation of balanced signals in larger installations. All devices are based on high-quality transformers and designed with entirely passive electronics, allowing for easy operation without the necessity for a power supply. With no active components in the signal chain, the Stage Series achieves perfect signal fidelity at minimal noise levels. Robust full-metal housings guarantee reliability in rough stage settings. With useful extra features, the Stage Series models from UNiKA are practical tools for modern audio engineers.