Radial Engineering

Radial Engineering R800 1404 JDX Direct-Drive Guitar Amp DI Box

4.5 (38 reviews)

Amp Tone in a DI BoxThe Radial JDX Direct-Drive is an active direct box designed to capture the essence of a guitar amplifier without needing the amp itself. It accurately reproduces the tone and feel of a miked guitar cabinet directly to the console. Type: DI with Guitar Amp Simulation Features...

$259.99*
In Stock on Amazon.com
View on Amazon

*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.

Affiliate Disclosure: Studio Supplies may earn a commission from qualifying purchases made through links on this page, at no additional cost to you. This helps support our editorial team.

Notice a mistake? Let Us Know

Overview

Amp Tone in a DI Box

The Radial JDX Direct-Drive is an active direct box designed to capture the essence of a guitar amplifier without needing the amp itself. It accurately reproduces the tone and feel of a miked guitar cabinet directly to the console.

  • Type: DI with Guitar Amp Simulation
  • Features: Polarity-reverse, Presence Switch, Ground-lift, Tuner out
  • Item Weight: 0.01 ounces
  • Product Dimensions: 6.35 x 4.1 x 2.9 inches
  • Connector Type: 6.35mm Jack, XLR
  • Signal Format: Analog
  • Power Source: Corded Electric
  • Voltage: 240 Volts

Key Features

DI with Guitar Amp Simulation

Polarity-reverse

Presence Switch

Ground-lift

Tuner out

Specifications

Product Type
DI Box
Function
Guitar Amp Simulation
Switch 1
Polarity-reverse
Switch 2
Presence Switch
Switch 3
Ground-lift
Output
Tuner out

Pros & Cons

👍 Pros

  • The Radial Engineering JDX Direct-Drive functions as a DI box with integrated guitar amp simulation, providing a direct signal to a mixer.
  • A polarity-reverse switch helps to correct phase issues when combining the direct signal with a miked amplifier.
  • The presence switch allows for tonal adjustments, enhancing the high-end clarity of the simulated amp sound.
  • A ground-lift switch effectively eliminates hum and buzz caused by ground loops, ensuring a clean audio signal.
  • It includes a tuner out, offering a convenient, dedicated output for connecting a tuner without interrupting the main signal path.

👎 Cons

  • As a DI box with amp simulation, it does not replace the physical presence or feel of a real guitar amplifier on stage.
  • Specific details about the type or range of "Guitar Amp Simulation" are not provided, limiting understanding of its tonal flexibility.
  • The functionality is specific to guitar signals, making it less versatile for bass or other instruments compared to general-purpose DI boxes.
  • The "polarity-reverse" and "ground-lift" switches are corrective features rather than creative sound-shaping tools.
  • Details on power requirements or whether it needs phantom power are not listed, which could be a consideration for setup.

Frequently Asked Questions

The Radial Engineering JDX Direct-Drive acts as a DI box that includes guitar amp simulation, allowing a direct signal to be sent to a mixer.
Yes, it features a polarity-reverse switch which can be used to correct phase problems when combining signals.
A presence switch is included, enabling users to fine-tune the high-end response and add clarity to the guitar tone.
It includes a ground-lift switch designed to eliminate hum and buzz that can be caused by ground loops in an audio system.
Yes, the JDX Direct-Drive features a dedicated tuner out, providing a convenient way to connect a tuner without affecting the main audio path.
The JDX Direct-Drive is specifically designed for guitar amp simulation, making it optimized for guitar signals.