IsoSmart 1 Channel Transformer DI Box – Balanced Audio Isolator - Ground Loop Eliminator

The IsoSmart 1 Channel Transformer Isolator DI Box is a compact, high-performance solution for eliminating ground loops, reducing noise, and ensuring clean signal transfer in professional audio, broadcast, and AV systems.

Each unit is fully hand wired in the UK, using carefully selected components and built with attention to detail that automated assembly simply doesn’t offer. Designed for reliability in real-world applications where consistency and signal integrity matter.

Why This Unit?

Fully hand wired in the UK – every unit individually assembled and tested

Consistent build quality with attention to grounding and signal path integrity

No automated mass-production shortcuts

Built using professional-grade components throughout

Wiring Notes

Balanced XLR input and output

Transformer isolated signal path (no direct electrical connection between input and output)

Ground lift switch disconnects signal ground (Pin 1) between input and output

Chassis is bonded to the male XLR for effective shielding and noise rejection

Internal wiring is hand assembled using Van Damme cables 

Fully passive design – no power required

Key Features

Fully hand wired in the UK

Transformer isolated balanced signal path

Ground lift switch for resolving hum and ground loops

Chassis bonded to output XLR for optimal shielding

Passive operation – no power required

Compact and rugged die-cast enclosure

Professional Neutrik connectivity throughout

Wide frequency response with minimal signal degradation

Standards & Compliance

Built using professional-grade components

Designed for pro audio, broadcast, and AV environments

Fully hand wired in the UK – Built to Order

Bottom Line

This isn’t a generic off-the-shelf box.

It’s properly assembled, hand wired in the UK, with correct grounding, quality components, and a signal path designed to solve problems cleanly.

It just works — which is exactly the point.