- Home Page /
- Musical Instruments /
- Studio Recording Equipment /
- Recording Signal Processors /
- Direct Boxes /
- Radial JDI Duplex mk4 Stereo Direct Box
0 ratings
The Radial JDI Duplex is a full-feature, stereo passive direct box designed to enhance connectivity, reduce noise, and simplify the hectic life of the touring professional. It features exceptional signal handling with virtually zero phase shift or harmonic distortion, while remaining linear across the entire audio spectrum.
Item #:
4298777
Radial JDI Duplex mk4 Stereo Direct Box
Item #:
4298777
€ 544
Price Details
Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )
*All items will import from US
0 ratings
Write a review
In stock
Imported from USA store
QTY:
Order now and get it around Tuesday, August 04
Secured transaction
Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.
Our Top Logistics Partners
The Radial JDI Duplex is a full-feature, stereo passive direct box designed to enhance connectivity, reduce noise, and simplify the hectic life of the touring professional. It features exceptional signal handling with virtually zero phase shift or harmonic distortion, while remaining linear across the entire audio spectrum.
Fast
Shipping
Free
Return*
Secure Packaging
100% Original Products
PCI DSS Compliance
ISO 27001 Certified
Note: Step 1 Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.
What Stands Out
High-Quality Conversion
Utilizes premium components for precise analog-to-digital conversion, ensuring crystal-clear sound quality, ideal for both studio and live settings.
Dual Channel Setup
Equipped with two independent channels for versatile signal handling, making it perfect for various applications, including instruments and vocals, without sacrificing quality.
Robust Build Design
Designed with a rugged, road-ready chassis, ensuring durability during transport, making it suitable for professional musicians and audio engineers on the move.
Product Details
- Stereo passive direct box with -10dB RCA and +4dB XLR inputs
- Jensen transformer-equipped for 100% isolation from ground loops
- Ultra linear response from 10Hz to 40kHz with virtually zero phase & harmonic distortion
- Exceptional signal handling to eliminate hum and buzz
- Plug-and-play, easy to use, and delivers utmost sonic quality
- Equipped with ¼' connectors, RCA connectors, 3.5mm TRS, and XLR inputs for versatile connectivity
| Item Weight | 2.71 pounds (1.23 kg) |
| Product Dimensions (L x W x H) | 8.3 x 6 x 3.2 inches (21.1 x 15.2 x 8.1 cm) |
| Item model number | R8001020 |
| Is Discontinued By Manufacturer | No |
| Date First Available | October 2, 2001 |
| Body Material | Synthetic |
| Connector Type | 1/4"TRS (2), XLR (2) |
| Material Type | Stainless Steel |
| Color Screen | No |
| Voltage | 240 Volts |
Who Should Buy?
-
Live Musicians
Ideal for live performers seeking high-quality audio transmission and reliable connection between instruments and sound systems.
-
Recording Engineers
Perfect for studio professionals needing accurate sound capture and impedance matching for various audio sources.
-
Sound Technicians
Great for audio engineers who require versatile and durable direct boxes for mixing and sound reinforcement applications.
-
Budget Users
Less suitable for those with tight budgets, as it is priced higher compared to basic direct box alternatives.
Product Description
Radial JDI Duplex mk4 Stereo Direct Box
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What is the Radial JDI Duplex mk4 Stereo Direct Box designed for?
Answer: The Radial JDI Duplex mk4 is designed to convert high-impedance instrument signals to a low-impedance signal, making it ideal for studio and live sound applications. It excels in preserving the audio quality of electric guitars, basses, and keyboard instruments. By providing balanced outputs, the direct box minimizes noise and interference when connecting to a PA system or recording interface, ensuring clarity and fidelity in sound reproduction. -
Question:
How does the Radial JDI Duplex mk4 differ from other direct boxes?
Answer: The Radial JDI Duplex mk4 stands out with its unique transformer-based design, which offers superior sound quality compared to passive direct boxes. It features two channels, allowing simultaneous connection of multiple instruments. This model also incorporates a ground lift switch to eliminate hum and noise. Additionally, its rugged build and intuitive layout are perfect for both stage and studio environments, catering to professionals who prioritize durability and sound integrity. -
Question:
Can I use the Radial JDI Duplex mk4 with my guitar and keyboard simultaneously?
Answer: Absolutely! The Radial JDI Duplex mk4 is equipped with two channels, enabling you to connect both your guitar and keyboard at the same time. This feature is particularly useful for musicians who switch between instruments during performances or recording sessions. Each channel operates independently, ensuring that both signals retain their original tonal characteristics, making it an excellent choice for live bands and studio setups. -
Question:
What are the benefits of using a DI box like the Radial JDI Duplex mk4?
Answer: Using a DI box, such as the Radial JDI Duplex mk4, offers multiple benefits, including improved sound quality and reduced signal degradation over long cable runs. It effectively matches the impedance of your instrument to that of the mixing console or audio interface, providing a clean and strong signal. Additionally, it helps protect your equipment from electrical interference and can make balancing your mix easier, resulting in a more professional sound for any performance or recording. -
Question:
Does the Radial JDI Duplex mk4 require an external power source?
Answer: No, the Radial JDI Duplex mk4 does not require an external power source. It operates passively, which means it relies on the signal from your instrument. This feature adds convenience, as you won’t have to worry about batteries or wall adapters during performances. This is particularly advantageous for artists who value simplicity and reliability in their equipment when performing on stage. -
Question:
Is the Radial JDI Duplex mk4 suitable for use with active and passive instruments?
Answer: Yes, the Radial JDI Duplex mk4 is designed to work with both active and passive instruments effectively. Its transformer-based design allows it to handle a broad range of signals, making it versatile for musicians using electric guitars, basses, and even certain keyboards. Musicians can rely on the duplex capability to capture each instrument’s unique tonal characteristics, ensuring that their performances sound their best without compromise. -
Question:
Can I use the Radial JDI Duplex mk4 for recording as well as live performances?
Answer: Certainly, the Radial JDI Duplex mk4 is versatile and can be effectively used in both recording and live performance environments. Its high-quality audio performance ensures clear transmission in studio setups, while its robust design makes it reliable for stage use. Many sound engineers and musicians appreciate the direct box's ability to seamlessly integrate with different audio systems, helping achieve optimal sound in any setting, from high-profile gigs to home studios. -
Question:
What inputs and outputs are available on the Radial JDI Duplex mk4?
Answer: The Radial JDI Duplex mk4 features dual 1/4" inputs to accommodate two instruments simultaneously. It offers both balanced XLR outputs for connecting to a mixer or audio interface, and also has a thru output for sending the signal to an amplifier. This versatility allows musicians and sound engineers to manage stage setups efficiently while ensuring high audio fidelity across different signal pathways. -
Question:
How is the sound quality of the Radial JDI Duplex mk4 compared to other direct boxes?
Answer: The Radial JDI Duplex mk4 is renowned for its exceptional sound quality, thanks to its transformer isolation and high-quality components. Unlike many passive or budget direct boxes, it reduces noise and interference, preserving the tonal integrity of your instruments. Musicians often find that the clarity and warmth of the audio signals provided by the JDI Duplex mk4 significantly enhance their overall sound experience, making it a preferred choice among professionals. -
Question:
Where can I buy Radial JDI Duplex mk4 Stereo Direct Box in Aland Islands?
Answer: You can conveniently purchase the Radial JDI Duplex mk4 Stereo Direct Box at Ubuy. They offer a reliable platform for acquiring this product, ensuring that you receive a genuine item. Ubuy provides a wide range of musical equipment, making it easy for you to explore various options and find the necessary accessories to complement your setup seamlessly.
Radial Engineering Direct Boxes R8001020 Editorial Review
No editorial reviews found
Customer Reviews & Ratings
1 customers ratings
-
5 Star
100%
-
4 Star
0%
-
3 Star
0%
-
2 Star
0%
-
1 Star
0%
Review this product
Share your thoughts with other customers
Platform Trust & Buyer Confidence
MA
Mohammad
Verified buyer
“Excellent quality and original too,when ubuy send original things I will appreciate that ,I very satisfied thank you”
23 July 2026 · via Trustpilot
CK
Chitra
Verified buyer
“The order and delivery progress was communicated very well. Package arrived within the estimated time. Products arrived as expected in good condition.”
22-Jul-26 · via Trustpilot
K
kund
Verified buyer
“Good supply of products. Safe payment methods, and shipment worldwide! Genuine products.”
23-Jul-26 · via Trustpilot
OO
Onesi
Verified buyer
“Was my first time buying a product from Ubuy, but I found it so helpful. This is reliable. Gonna place a new order!”
22 July 2026 · via Trustpilot
SJ
SAO JOHN
Verified buyer
“Ubuy is a great online platform to buy stuff. Reliable, fast delivery time and great value for money. I've been using Ubuy online shopping platform for three years now and will continue to do so.”
23 July 2026 · via Trustpilot
Secure Checkout
Global Delivery
Easy Returns
Genuine Products
Product Price History
Important information
- Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
- Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.
€ 544
Order now and get it around Tuesday, August 04
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
QTY:
Secured transaction
PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.
Our Top Logistics Partners
Fastest cross-border delivery
Features & Benefits
- 'Swiss Army knife' DI with various connectors
- Exceptional signal handling
- Elimination of ground loops and interference
- Easy to use plug-and-play design
- Outstanding sonic quality
- High-performance 'made in the USA' audio transformers
Ubuy Assurance
Experience worry-free shopping with 100% original products, PCI DSS-compliant payment security, ISO 27001-certified data protection, the fastest cross-border delivery, free returns *, and secure packaging on every order.