Radial Engineering

Radial Engineering R8001010 JDI Mk3 DI Box

phantom power

Achieve Pristine Audio Isolation for Studio and StageThe Radial Engineering JDI Mk3 Passive Direct Box is engineered with a Jensen transformer for exceptional audio fidelity. This high-quality DI box provides complete isolation, reducing noise and delivering a linear response ideal for acoustic g...

$259.99*
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*Price sourced from Amazon.com. Last updated:Aug 27, 2026.Price and availability are subject to change — details.

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Overview

Achieve Pristine Audio Isolation for Studio and Stage

The Radial Engineering JDI Mk3 Passive Direct Box is engineered with a Jensen transformer for exceptional audio fidelity. This high-quality DI box provides complete isolation, reducing noise and delivering a linear response ideal for acoustic guitars, bass, and keyboards in both recording and live environments.

  • Design: 100% passive design, no phantom power required
  • Transformer: Jensen transformer equipped
  • Inputs: Dual function inputs with 2 channel merge
  • Switch: Polarity reverse switch
  • Item Weight: 2.79 pounds
  • Product Dimensions: 6 x 7 x 10 inches
  • Color Name: Green

Key Features

100% passive design - no phantom power

Jensen transformer equipped

Dual function inputs w/2 channel merge

Polarity reverse switch

Specifications

Design Type
100% passive
Transformer
Jensen transformer equipped
Inputs
Dual function inputs w/2 channel merge
Switches
Polarity reverse switch

Frequently Asked Questions

No, the Radial Engineering JDI Mk3 is a 100% passive DI box, meaning it does not require phantom power or batteries for operation.
The Jensen transformer equipped design provides superior signal integrity and excellent ground isolation, which helps eliminate hum and noise, ensuring a clean audio signal.
Yes, the JDI Mk3 features dual function inputs with a 2-channel merge capability, allowing you to sum two signals together if needed.
The polarity reverse switch is crucial for correcting phase discrepancies that can occur between different microphones or sound sources, helping to ensure a cohesive and balanced sound.
As a passive DI, while it maintains signal integrity, it does not provide gain boosting. For very low-output instruments, an active DI might be considered if more gain is required before the mixing console.