Pricing and availability

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

Sweetwater
5.0 (74)
$209.99
Guitar Center
5.0 (25)
$209.99
Amazon
4.8 (471)
$209.99 New
$199.49 Used (Like New)
Reverb
5.0 (16)
$183.69 New
$87.64 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

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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 FKJ uses Radial Engineering ProD2 Stereo Direct Box

FKJ

Guitarist, Bassist

...
Verified via YouTube

Radial Engineering's ProD2 Stereo DI Box seen on table throughout the video.

See how Avey Tare uses Radial Engineering ProD2 Stereo Direct Box

Avey Tare

Singer, Guitarist

Animal Collective

...
Verified via Photo

This photo shows his pedal board from an Avey Tare's Slasher Flicks show.

See how A. G. Cook uses Radial Engineering ProD2 Stereo Direct Box

A. G. Cook

Keyboardist, Music Producer

...
Verified via YouTube

The picture shown at 5:42 in the Arte TRACKS interview video shows the ProD2 box to the right of A.G. Cook's head.

See how Daughter (official) uses Radial Engineering ProD2 Stereo Direct Box

Daughter (official)

Guitarist

Daughter

...
Verified via Photo

Igor's pedalboard at National Sawdust in Brooklyn NY on 4/4/2016

See how Andy Gill uses Radial Engineering ProD2 Stereo Direct Box

Andy Gill

Guitarist

Gang of Four

...
Verified via Photo

In this Premier Guitar Rig Rundown feature, we see that Gill's guitar rig includes two MacBook Pro laptops, which are connected to the FOH via two ProD2 units.

See how Cory Hanson uses Radial Engineering ProD2 Stereo Direct Box

Cory Hanson

Singer, Guitarist

Wand

...
Verified via Photo

In this pic you can spot this DI box laying next to his pedalboard

See how Ángel Parra uses Radial Engineering ProD2 Stereo Direct Box

Ángel Parra

Guitarist, Composer

Los Tres

...
Verified via Photo

Ángel Parra is confirmed to use the Radial Engineering ProD2 Stereo Direct Box, as evidenced by a photo showing him testing his pedalboard for a new phase of "La Revuelta" by Los Tres. The proof can be seen in the Instagram reel where the Audio Sprockets ToneDexter pedal is also visible.

See how Igor Haefeli uses Radial Engineering ProD2 Stereo Direct Box

Igor Haefeli

Guitarist, Bassist

Daughter

...
Verified via YouTube

At 22:06 minute mark, Radial ProD2 Stereo Direct Box can be seen.

See how Karl Hyde uses Radial Engineering ProD2 Stereo Direct Box

Karl Hyde

Singer, Guitarist

Freur

...
Verified via Photo

This image posted to Underworld's Instagram account shows Karl's Cornell combo amp with a PRO D2 box and a pair of TU-12 tuners perched on top.

See how Bryan Devendorf uses Radial Engineering ProD2 Stereo Direct Box

Bryan Devendorf

Drummer, Composer

The National

...
Verified via Modern Drummer Magazine

According to this article that discusses the kit that Bryan uses, Radial Engineering ProD2 direct box is one of the items he carries during touring.

See how Bo Rinehart uses Radial Engineering ProD2 Stereo Direct Box

Bo Rinehart

Guitarist

Needtobreathe

...
Verified via Flickr

In this photo, which shows Rinehart's pedalboard from 2011 (more photos from the concert can be found here), one of the items that can be seen is the Radial direct box.

See how Richie Castellano uses Radial Engineering ProD2 Stereo Direct Box

Richie Castellano

Guitarist, Bassist

Blue Öyster Cult

...
Verified via Photo

In this photo, the Radial PRO D2 can be seen on top of his Engl Steve Morse amplifier.

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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