Pricing and availability

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Sweetwater
5.0 (74)
$209.99
Guitar Center
5.0 (25)
$209.99
Amazon
4.8 (471)
$209.99 New
$189.00 Used (Very Good)
Reverb
5.0 (16)
$183.94 New
$87.83 Used
Musician's Friend
5.0 (9)
$209.99
zZounds
4.5 (2)
$209.99
B&H
4.9 (17)
$209.99
Thomann
4.9 (273)
$222.00
Gear4Music
£203.00

Average Price: $196

Standard/Professional

$119

$300+

Price Tier

Budget

Standard

High-end

Price History

Based on price data from 7 merchants for "Radial Engineering ProD2 Stereo Direct Box". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

Experience Superior Audio Quality with the Radial Engineering ProD2 Stereo Direct Box

In a world where audio quality can make or break your performance, you need gear that you can rely on. Allow us to introduce the Radial Engineering ProD2 Stereo Direct Box. This premium tool is designed to provide superior signal transfer without compromise.

This direct box is engineered with two proprietary custom transformers that ensure a linear frequency response, ultra-low distortion, and zero phase distortion. This means you get pristine audio quality, whether you're performing live or recording in the studio.

The ProD2 is not just about delivering excellent sound. It's also designed to eliminate hum and buzz from ground loops through transformer isolation, making your setup quick and hassle-free. This feature ensures a pure signal path from your instrument to the mixer or recording device.

But the ProD2 isn't just about performance. It's also built to last. Despite its premium performance, it's constructed with a 14-gauge steel chassis and a durable baked-enamel finish to withstand the rigors of live use and repeated setup and teardown.

Key Features: - Proprietary custom transformers that provide linear frequency response and ultra-low distortion - Transformer isolation to eliminate hum and buzz from ground loops - Rugged construction with a 14-gauge steel chassis and durable baked-enamel finish - Simple yet versatile operation with intuitive controls and connections - Exceptional sound clarity and definition - Ideal for various instruments including acoustic guitars, bass guitars, electronic keyboards, drum machines, samplers, and more.

Owner's manual

Radial Engineering ProD2 Stereo Direct Box User Manual

Product specs

Type Passive DI
Channels 2
Pads -15dB
Ground Lift Yes
Inputs 2 x 1/4"
Outputs 2 x XLR, 2 x 1/4" thru
Height 1.88"
Width 3.25"
Depth 5"
Weight 1.95 lbs.

FAQs

What is the primary use of the Radial Engineering ProD2 Stereo Direct Box?

The Radial Engineering ProD2 is designed for connecting stereo instruments like keyboards to a mixing console, providing a clean, balanced signal with minimal noise.

Does the Radial ProD2 require external power to operate?

No, the Radial ProD2 is a passive direct box and does not require any external power source to function.

Can the Radial ProD2 handle high signal levels?

Yes, the Radial ProD2 is capable of handling high signal levels, making it suitable for use with active instruments such as keyboards and electronic devices.

Does the Radial ProD2 offer a ground lift switch?

Yes, the Radial ProD2 includes a ground lift switch to help eliminate hum and noise caused by ground loops.

What are the input and output options on the Radial ProD2?

The Radial ProD2 features 2 x 1/4" inputs and outputs, along with 2 x XLR outputs, allowing flexible connectivity for stereo instruments.

SpectreSoundStudios

SpectreSoundStudios

Do you need a Direct Box? - Test Results!

Video thumbnail for Do you need a Direct Box?  -  Test Results! by SpectreSoundStudios

Do you need a Direct Box? - Test Results!

SpectreSoundStudios

SpectreSoundStudios

Video thumbnail for Radial Engineering ProAV2 Passive Stereo Direct Box Overview | Full Compass by Full Compass

Radial Engineering ProAV2 Passive Stereo Direct Box Overview | Full Compass

Full Compass

Full Compass

Video thumbnail for ProD2 | Radial Engineering by Radial Engineering

ProD2 | Radial Engineering

Radial Engineering

Radial Engineering

Video thumbnail for 𝐆𝐫𝐨𝐮𝐧𝐝 𝐋𝐨𝐨𝐩 𝐍𝐨𝐢𝐬𝐞 | 𝐑𝐚𝐝𝐢𝐚𝐥 𝐏𝐫𝐨𝐃𝟐 𝐃𝐈 𝐁𝐨𝐱 𝐯𝐬 𝐢𝐅𝐢 𝐢𝐃𝐞𝐟𝐞𝐧𝐝𝐞𝐫 𝐔𝐒𝐁 by Leon Thomasian

𝐆𝐫𝐨𝐮𝐧𝐝 𝐋𝐨𝐨𝐩 𝐍𝐨𝐢𝐬𝐞 | 𝐑𝐚𝐝𝐢𝐚𝐥 𝐏𝐫𝐨𝐃𝟐 𝐃𝐈 𝐁𝐨𝐱 𝐯𝐬 𝐢𝐅𝐢 𝐢𝐃𝐞𝐟𝐞𝐧𝐝𝐞𝐫 𝐔𝐒𝐁

Leon Thomasian

Leon Thomasian

Video thumbnail for Di Box Quick Review | Radial Engineering ProD2 by Quick Amazon Reviews

Di Box Quick Review | Radial Engineering ProD2

Quick Amazon Reviews

Quick Amazon Reviews

Reviews

PROS

  • Resolves frequency noise and grounding issues effectively

  • Built like a tank; incredibly durable

  • Excellent sound clarity and warmth, especially for keyboards

  • Stereo capability enhances mix presence and reduces phase cancellation

  • Reliable passive design; no batteries needed

  • Maintains clean, hum-free signal even under load

  • Quality connectors and components prevent damage from phantom power

  • High-quality transformers offer superior audio performance

  • Popular among sound engineers for ease of use and reliability

  • Versatile for multiple instruments and applications

CONS

  • Can color the tone, making some patches darker

  • High price point compared to other DI boxes

  • Buttons may occasionally stick, requiring maintenance

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Radial Engineering ProD2 Stereo Direct Box.

Features and functionality

  • The Radial PZ-DI includes high and low shelf controls, making it suitable for both piezo pickups and standard low impedance sources.

    Source
  • Radial's active DIs such as the J48 provide a noticeable high-mid texture beneficial for fingerpicking styles, but less suited for aggressive strumming.

    Source

User experience

  • A user experienced failures in multiple Radial ProDI units within two years in a church setup, despite careful handling and minimal movement.

    Source
  • Owners report that the Radial ProD2's transformers can help dull metallic highs above 4-5kHz, offering a smoother sound for bass and acoustic guitars.

    Source
  • Radial ProAV2 is frequently recommended for its versatility as a go-to DI for many event types, including theater shows and client-run events.

    Source
  • Radial's Stagebug series offers compact, lightweight solutions for mobile setups, though some users find the build quality less robust than full-size models.

    Source

Build quality

  • Radial DIs are known for their durability against heavy impact but may sustain damage if dropped from a table, as noted by multiple users.

    Source
  • Owners have reported that transformer connections in the ProD2 often fail, affecting its reliability, especially if dropped from a height.

    Source
  • Some users report issues with the Radial BT-Pro's plastic housing, specifically around the Bluetooth sensor, which has cracked and required repair.

    Source
  • The ProD2 has been tested in harsh conditions, surviving submersion due to its military-grade epoxy, highlighting its durability for rugged use.

    Source

Comparisons

  • The Klark Teknik DN100, though discontinued, is noted for its robust silicone sleeve and higher input impedance compared to Radial's J48 and Pro48.

    Source
  • Fire Eye RedEye DIs are noted for their sound quality on piezo pickups but lack a ground lift, affecting their suitability as a primary unit.

    Source
  • The Radial Pro D2 is praised as a reliable stage workhorse, while the JDI is noted for its true signal representation, especially with Jensen transformers.

    Source

Other

  • Radial gear is favored not just for performance but also because it is manufactured in Canada, appealing to those who prioritize locally made products.

    Source

Software and compatibility

  • For digital or virtual events, Radial's USB DIs are highlighted as effective for transitioning audio from computers to consoles.

    Source

Use cases and applications

  • The Radial PZ-DI's switchable impedance is praised for making soundchecks easier by flipping the input load for various acoustic instruments.

    Source
  • For orchestral instruments with passive piezo pickups, a high-impedance DI like Radial’s piezo DI is recommended for optimal sound quality and flexibility.

    Source
  • The ProD2 is favored for live applications where signal fidelity is crucial, but active DIs like the J48 are preferred for weak passive pickups due to hotter signal output.

    Source

5.0 out of 5

Based on 1 Review and 7 Ratings

5 star
4 star
3 star
2 star
1 star
xaqary

The always under appreciated DI

Always have a DI on hand. Standard duties include running any electric keyboards thru to take off a bit of that bite in the upper frequencies, standard bass set ups, etc.

I have both the Jensen Stereo Model and the PRO D2. Radial makes quality gear you can count on and these are no exception.

Artist usage

Add artist
See how Joshua Mobaraki uses Radial Engineering ProD2 Stereo Direct Box

Joshua Mobaraki

Guitarist, Keyboardist

Wet Leg

...
Verified via YouTube

Can be seen at 4:47 in this video.

See how Alan Gogoll uses Radial Engineering ProD2 Stereo Direct Box

Alan Gogoll

Guitarist, Composer

...
Verified via Photo

Alan Gogoll shows in his own youtube video that he used this in the Hansa Studio session.

See how Jop van Summeren uses Radial Engineering ProD2 Stereo Direct Box

Jop van Summeren

Bassist

De Staat

...
Verified via Photo

In an Instagram post by Jop van Summeren, the Radial Engineering ProD2 Stereo Direct Box is visible during a performance with De Staat, highlighting its use in their "Larger Than Live" stream.

See how Phil Shouse uses Radial Engineering ProD2 Stereo Direct Box

Phil Shouse

Singer, Guitarist

Accept

...
Verified via Photo

Phil Shouse showcases his use of the Radial Engineering ProD2 Stereo Direct Box on Instagram, highlighting its role on what he humorously claims to be the smallest pedalboard in country music.

See how Billy Chuchat uses Radial Engineering ProD2 Stereo Direct Box

Billy Chuchat

Guitarist, Keyboardist

Tilly Birds

...
Verified via YouTube

In the YouTube video "59Gear EP.2 [Part.2/2] Billy Tilly Birds @BILLbilly01" by Boy59’s Shop, Billy Chuchat is shown using the Radial Engineering ProD2 Stereo Direct Box as the main DI on his personal pedalboard.

See how Michael Trent uses Radial Engineering ProD2 Stereo Direct Box

Michael Trent

Singer, Guitarist

The Films

...
Verified via Premier Guitar

"The board for 'Thing 2,' beside the guitar amps, includes an EHX Mel9 and Bass9 powered by a Truetone 1 SPOT Pro, plus a Radial ProD2."

See how Dave Dupuis uses Radial Engineering ProD2 Stereo Direct Box

Dave Dupuis

Guitarist

Film School

...
Verified via Photo

In an Instagram post by Dave Dupuis, he is seen using the Radial Engineering ProD2 Stereo Direct Box.

See how Zach Brock uses Radial Engineering ProD2 Stereo Direct Box

Zach Brock

Composer

Snarky Puppy

...
Verified via Photo

Visible in this May 13, 2016 Instagram post and this August 24, 2016 post.

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 Engineering ProD2 Stereo Direct Box, it is most commonly used with the following gear.

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