Congratulations on purchasing the SCHERTLER® YELLOW UNO preamp. It is our pleasure to welcome you to a growing family of musicians and technicians, including many of the world’s leading soloists and sound engineers, who have chosen to work with SCHERTLER® products. YELLOW UNO has been specially designed to offer a compact high-quality solution that meets the live performance needs either if paired to the SCHERTLER STAT mics or any other source, both ensured to your belt for freedom to move on stage or placed in your pedalboard. Each individual section has been developed and engineered to ensure maximum potential from any kind of sound source. The preamp features pure Class-A electronics with no integrated circuits and No Negative Feedback for optimum results. Its modern sophisticated design and lightweight yet robust aluminum housing makes it highly suitable for constant use in a range of environments. YELLOW UNO’s intuitive controls offer both flexibility and straightforward adjustment of sound parameters, giving you the freedom to bring out the best of your instrument’s sound characteristics. In our continuing quest to improve the transmission and reproduction of acoustic instrument sound, we hope that YELLOW UNO will also enhance your personal performing or recording experience.

Stephan Schertler President, electronic designer

1. OUTPUT: The signal can be sent to an active loudspeaker or/and to another device. This TRS balanced 1/4" jack connection can be switched between UNBALANCED and BALANCED. In balanced mode the battery consumption is higher. 2. INPUT: This enables the connection of instruments. This TS balanced 1/4" jack allows the connection of kind of instruments. The Bootstrap technology guarantees always the best sound quality no matter the source of the signal.  3. 10V: This supplies the INPUT 1/4” jack connector with 10 VDC for powering electret microphones. 4. MUTE: This cuts the audio signal on OUTPUT. 5. WARM: This adjustable low-pass filter dampens higher frequencies to produce a warmer sound when using bridge-mounted pickups such as SCHERTLER STAT Series transducers for violin, cello and double bass. 6. VOLUME: This variable input preamp adjusts the sensitivity level to ensure the best possible processing of the signal through the channel. It is important that this input level be set and optimized in the best way to achieve the cleanest sound possible.