Pricing and availability

We compare 600+ stores and found this item at 10 stores. Prices updated .

Sweetwater
4.5 (10)
$399.99
Guitar Center
5.0 (1)
$399.99
Amazon
4.6 (37)
$399.99
Reverb
5.0 (4)
$228.09 New
$349.99 Used
Musician's Friend
5.0 (1)
$399.99
zZounds
4.5 (1)
$399.99
B&H
5.0 (1)
$399.99
Thomann
5.0 (17)
$409.00 $399.00 $10.00 · All time low
Gear4Music
£419.00

Average Price: $378

High-end/Boutique

$119

$300+

Price Tier

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Standard

High-end

Price History

Based on price data from 7 merchants for "Radial JDI Stereo Passive DI". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

The Radial JDI Stereo Passive DI Box is a harmonious blend of durability and top-notch audio fidelity, perfect for both live performances and studio sessions. This direct box is a go-to tool for musicians who prioritize pure signal clarity and robust construction. Its Jensen transformers are the heart of the unit, providing a warm, smooth sound reminiscent of vintage audio gear. With a frequency response from 10Hz to 40kHz and virtually no phase deviation, the JDI Stereo ensures that your instrument's true voice is conveyed without distortion or unwanted artifacts.

Designed for the rigors of touring, the JDI Stereo features an ingenious steel I-beam and book-end construction that safeguards its internal components while minimizing stress on the PCB. This not only protects the sensitive circuitry from stage-related wear and tear but also keeps external electromagnetic interference at bay, thanks to its built-in Faraday shield. Whether you're a keyboardist, guitarist, or bassist, you'll appreciate the seamless integration this direct box offers for stereo setups or dual mono applications.

For those battling hum and buzz, the JDI Stereo's transformer-isolated inputs and outputs, along with a convenient ground lift switch, offer an effective solution. Moreover, its -15dB pad and additional features like 1/4" input and thru connectors, plus XLR outputs, make it versatile enough for any audio scenario.

Key Features:

  • Equipped with Jensen transformers for superior sound quality
  • Ruler-flat frequency response from 10Hz to 40kHz
  • -15dB input pad for handling high-output signals
  • Transformer-isolated inputs and outputs to reduce noise
  • Robust 14-gauge steel construction for durability
  • Ground lift switch to eliminate hum and buzz
  • 1/4" input, thru-put connectors, and XLR outputs

Owner's manual

Radial JDI Stereo Passive DI User Manual

Product specs

Type Passive
Channels 2
Pads -15dB
Ground Lift Yes
Inputs 2 x 1/4"
Outputs 2 x XLR, 2 x 1/4" (Thru)
Height 1.8"
Width 3.3"
Depth 5"
Weight 1.55 lbs.

FAQs

Does the Radial JDI Stereo Passive DI require external power?

No, the Radial JDI Stereo is a passive direct box and does not require external power such as phantom power or batteries. It operates simply by connecting your instruments.

What types of inputs and outputs does the Radial JDI Stereo provide?

The Radial JDI Stereo offers 2 x 1/4" inputs and 2 x XLR, 2 x 1/4" (Thru) outputs, allowing for flexible connectivity options for various instruments and audio setups.

Is the Radial JDI Stereo suitable for high-output instruments?

Yes, the Radial JDI Stereo is ideal for high-output instruments due to its passive design, which can handle extreme signal levels without distortion.

What is the purpose of the -15dB pad on the Radial JDI Stereo?

The -15dB pad on the Radial JDI Stereo reduces the input signal level, making it suitable for use with high-output sources, preventing overload and ensuring clean signal transmission.

How does the Radial JDI Stereo handle ground loop issues?

The Radial JDI Stereo is equipped with a ground lift switch, which helps eliminate hum and buzz caused by ground loops, ensuring a clean and clear audio signal.

Keyboard Instrument Chops and Gear

Keyboard Instrument Chops and Gear

Radial JDI Stereo DI at NAMM 2015

Video thumbnail for Radial JDI Stereo DI at NAMM 2015 by Keyboard Instrument Chops and Gear

Radial JDI Stereo DI at NAMM 2015

Keyboard Instrument Chops and Gear

Keyboard Instrument Chops and Gear

Reviews

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Radial JDI Stereo Passive DI.

Build quality

  • The Radial JDI is praised for its rugged chassis and reliable connectors, capable of surviving harsh impacts like being thrown onto concrete without damage.

    Source

Features and functionality

  • The JDI can handle input levels up to +21 dBu without significant distortion, making it suitable for active bass guitars and keyboards.

    Source
  • A buffered pedal, like the Boss TU12 or JOYO American Sound, can enhance passive guitar signals before the JDI, optimizing tone capture.

    Source

Comparisons

  • In a comparison between the JDI and the tube-driven REDDI DI, the JDI was noted to hold up surprisingly well, offering a close performance despite its lower price.

    Source
  • The J48 is perceived as a sidegrade to the JDI, with no significant audio improvement for passive instruments, suggesting the JDI remains adequate for most needs.

    Source
  • The Pro48 offers a noticeable sound improvement over the JDI for bass, though bass DI enthusiasts often prefer models like the Focusrite ISA or Avalon 737 for superior tone.

    Source
  • The JDI is noted for its superior signal representation in live scenarios compared to the Pro D2, especially on FOH aux channels.

    Source
  • Some users find the Stagebug series lacking in quality compared to the full-size Radial DIs, despite their compact convenience.

    Source

Use cases and applications

  • The JDI is favored for its ability to deliver a "fatter" bass signal compared to older Countryman DIs from the 90s.

    Source
  • Passive DIs like the JDI are deemed sufficient for guitars with strong magnets, such as modern humbuckers, due to their wide amperage range.

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  • The JDI is especially recommended for use with high power rigs over 100k watts for its noticeable audio quality.

    Source
  • For acoustic instruments, consider Radial's high-impedance DIs like the PZ-DI for improved sound quality with instruments like violins and mandolins.

    Source

User experience

  • Owners often find missing paint chunks on their JDIs, though this appears to be a common cosmetic wear rather than a performance issue.

    Source
  • For acoustic guitars, the JDI delivers a noticeably more pleasant high-end sound compared to the Radial ProDI, according to several engineers in a blind test.

    Source
  • The most audible difference between active and passive DIs is output level, with active DIs typically delivering a hotter signal, adjustable via a pad switch.

    Source
  • One user reports that the Pro D2 survived being submerged in rainwater, highlighting its durability and resilience in harsh conditions.

    Source

Critic Reviews

Review: Radial JDI Stereo - Audio Media International

audiomediainternational.com

The Radial JDI Stereo Passive DI brings the renowned quality of Jensen transformers into a practical stereo format, making it a compelling choice for live sound and studio setups. Its flat frequency response and impressive phase linearity are standout features that enhance audio clarity. However, the lack of certain functionalities found in the mono version, like the phase reverse switch and merge function, may leave some users wanting more versatility. The shared PCB design can also introduce slight crosstalk, which could be a concern for critical applications. Overall, while it excels in accuracy and warmth, it might not fully satisfy those seeking the comprehensive feature set of its predecessor.

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Artist usage

Add artist
See how Jonny Greenwood uses Radial JDI Stereo Passive DI

Jonny Greenwood

Guitarist

Radiohead

...
Verified via Photo

A photograph of Jonny Greenwood's backup pedalboard, taken during the June 2024 tour, clearly shows the use of a Radial JDI Stereo Passive DI.

See how Tal Wilkenfeld uses Radial JDI Stereo Passive DI

Tal Wilkenfeld

Singer, Bassist

Jeff Beck(band)

...
Verified via Radial Engineering

She uses both versions - the passive box and the stereo version .

See how Jacob Bugden uses Radial JDI Stereo Passive DI

Jacob Bugden

Guitarist, Music Producer

...
Verified via Photo

In this Instagram story from the 29th of March 2026, we can see Bugden’s home studio which includes a pedalboard with a Radial JDI Stereo Passive DI

Genre Usage

Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.

Used With

Based on how musicians on Equipboard use Radial JDI Stereo Passive DI, it is most commonly used with the following gear.

Radial JDI
Radial JDI Direct Boxes
1

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