ProCo Sound Isolation Transformer | 1

Sound system technicians, touring engineers, and broadcast crews working with unbalanced signal paths face persistent ground loop and interference problems that electronically balanced circuits simply cannot resolve. The ProCo Sound Isolation Transformer series addresses this at the source, using high-quality 1:1 line-level transformers whose common-mode voltage range tolerates improper connections and fault conditions that would compromise transformerless designs — making them a reliable choice for both portable rigs and permanent installations exposed to SCR lighting dimmers, radio transmitters, and 60 Hz AC hum fields.

For live sound technicians, the unit floats unbalanced mixer outputs driving long cable runs to power amplifier inputs, eliminating hum without introducing signal degradation. Musicians and playback operators can use it as a line-level direct box for connecting synthesizers, samplers, or sound modules to a console without the impedance step-down of a traditional DI. Broadcast and ENG teams will find it equally useful for deriving clean remote feeds from press conference or meeting room PA systems. The ProCo Sound LOT-P transformer at its core delivers a floating, low-impedance output with wide, flat frequency response, ultralow distortion, and no ringing or overshoot.

The Uni-box enclosure — built from extruded aluminum side channels and 16-gauge steel plates — shields the internal transformer from 60 Hz magnetic hum fields while protecting connectors and switches from physical damage in demanding field use. Top-quality connectors ensure reliable service through repeated remote broadcast and recording deployments.