BOLANLE DB-1 Passive DI Box With Pad Ground Lift Phase Reverse for Guitar Bass Live Performance Studio

A single-channel, transformer-isolated direct box designed to convert high-impedance (Hi-Z) unbalanced signals into low-impedance (Lo-Z) balanced XLR outputs. Because it uses a passive design, it runs entirely without batteries or external phantom power. It serves as a problem-solver for musicians and stage audio engineers to eliminate ground-loop hum and handle hot instruments like keyboards, electric guitars, and active basses. 
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\nKey Features & Technical Specifications
\nSignal Conversion: Converts unbalanced 1/4\" instrument inputs into a balanced mono XLR output.
\nBuilt-in Isolation Transformer: Provides pure signal isolation to prevent distortion and safely pass long-distance cable runs to a front-of-house mixing console. 
\nHum Suppression: Equipped with a switchable ground lift to break ground loops and kill 60Hz AC hum or buzz coming from stage amplifiers. 
\nAttenuation Pad: A multi-level pad switch (0dB, -20dB, and -40dB) prevents clipping distortion when interfacing with high-output audio gear. 
\nPhase Utility: Features a 180° phase reverse switch to quickly repair phase cancellation issues on stage or in the studio. 
\nThru Connection: Includes a 1/4\" parallel Thru port, allowing you to route your dry signal directly out to an on-stage monitor or guitar amplifier while simultaneously sending the balanced signal to the PA system. 
\nTwo-Way Versatility: Uniquely supports bidirectional utility, acting as both an Instrument-to-XLR direct box or an XLR-to-Instrument re-amping tool.