Source Audio Bass ZIO Preamp + DI Pedal

Analog Bass Preamp and DI for Studio and Stage

The Source Audio Bass ZIO Preamp + DI is an all-analog bass tone shaping pedal designed to serve as the foundation of a professional bass rig. It functions as both a high-quality preamp placed in front of an amplifier and a direct box with a balanced XLR output for live sound and recording. Built for bass players who need consistency, punch, and control, the ZIO delivers rich analog character with extremely low noise and wide dynamic range.

All-Analog Signal Path with Studio-Grade Components

At the heart of the ZIO is a carefully designed analog circuit using premium Burr-Brown operational amplifiers. This design provides excellent headroom, fast transient response, and musical gain staging that preserves the natural character of your instrument. Whether you are running passive or active basses, the pedal maintains clarity and authority without unwanted distortion or compression.

Powerful Low-End Control for Modern Bass Tones

The BASS control is voiced to add substantial low-frequency impact around 100 Hz while subtly reducing muddy low-mid buildup. This approach allows bass lines to stay thick and present without overwhelming a mix. The result is a focused low end that works equally well for fingerstyle, slap bass, and synth-inspired bass tones.

Focus Control for Tight and Punchy Response

The FOCUS knob adjusts the cutoff point of an integrated high-pass filter, allowing players to manage excessive sub-bass energy. By tightening the lowest frequencies, the ZIO increases available headroom and improves note definition, especially in live environments or when using extended-range basses. This control is particularly useful for adapting to different rooms, cabinets, and PA systems.

Treble Shaping and Output Flexibility

The TREBLE control provides smooth high-frequency boost or cut, making it easy to add articulation and clarity without harshness or to soften aggressive attack transients. The OUTPUT control offers a wide gain range, providing up to +16 dB of boost above unity or the ability to attenuate the signal when needed. This makes the ZIO suitable for use as a clean boost, tone shaper, or primary preamp.

Balanced DI Output for Professional Integration

With its balanced XLR output, the ZIO functions as a reliable direct interface for front-of-house mixers, audio interfaces, and recording consoles. This makes it an excellent solution for bassists who want consistent tone from stage to studio while reducing reliance on backline gear. The pedal’s compact format and straightforward controls make it easy to integrate into any pedalboard.