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The JDI is a high performance passive direct box for live concert touring and professional studio recording applications, featuring a premium Jensen transformer for exceptional audio performance.
The Radial JDI is a passive direct box designed to handle extreme signal levels without distortion of any kind. At the heart, the Radial JDI employs the world class Jensen JT-DB-EPC audio transformer delivering a smooth, warm sounding Bessel curve, reminiscent of the finest vintage gear. Ruler flat from 10Hz to 40kHz and with virtually zero phase deviation, the JDI delivers the natural, pure sound of the instrument without artifact. By its no-power passive design, the Radial JDI performs both high-to-low impedance conversion and signal balancing over a magnetic bridge that passes signal while rejecting stray DC voltage. This makes the JDI particularly adept at eliminating hum and buzz caused by ground loops.
The JDI is often selected for high output bass guitars. It is able to handle huge signal levels without distortion or artifact. On stage it sends the pure sound of the bass to the PA with minimal loading. In studio, it is perfect for recording direct.
Most acoustic guitars have built-in preamps that can be peaky. The JDI naturally smoothes out the transients for a warmer tone. And because the JDI is able to handle huge transients, it will not distort. This makes the JDI a great direct box for acoustic guitars.
Today's digital keyboards are not only very dynamic, some like digital pianos have a tremendously wide frequency response. The Radial JDI is able to withstand excessive signal levels at all frequencies without introducing distortion or phase shift.
"Our RF noise tests proved the JDI to be flawless. The JDI Mk3 is a great choice when you need a DI box for a synth, an amplifier or an instrument with active pickups. It will also work in reverse as a Reamp."
"The best thing you can say about a direct box is that you forget it's there. The JDIs are transparent and noise free. They performed very well on every source I fed them, including electric and acoustic guitar and bass. Even in an environment that's occasionally prone to grounding problems and noise, the signal was ultra clean."
"Radial DI boxes sound - in a word - pure. Compared to these, my old standby active DI has a thinner and harsher tone. No matter what type of signal I put through, the Radial DIs sounded round and natural. Radial has done a superb job with these."
"With its Jensen transformer and excellent overload characteristics, the JDI can handle any situation flawlessly."
"The JDI is a winner from every angle. It's roadworthy, it's feature packed and it sounds great! The Radial design team is obviously more than a bunch of white coats who only make it out of the lab once a week to watch Star Trek. They are a team who understand the needs of recording and sound reinforcement engineers and know how to design a product to meet these needs."
"I can say with no hesitation that you won't find anything out there offering better performance or more durability for the money."
"Radial's JDI passive direct box is amazingly clean and noise free. Its design is a direct result of asking reputable names in the industry what would make up a great direct box."
"The frequency response and phase response of the Radial JDI is excellent and the sound of the unit can only be described as completely transparent. This is an excellent passive DI box that will keep on working even after the band's van drives over it."
"My biggest regret is not finding out about Radial Engineering direct boxes sooner! We have transitioned through our move to individual monitor mixes from FOH, to a dedicated monitor console, to personal mixers and the Radial direct boxes have continued to work flawlessly through all of our upgrades."
The National
"The Radial J-Class DIs are easily the most reliable & consistent DI products available to the touring artist. Not only do they deliver a clean signal, they also seem to provide a unique warmth which is essential to The National's sound."
The Beatles, Pink Floyd, Al Stewart, The Alan Parsons Project
"The Alan Parsons Live Project band uses a large number of keyboards, acoustic guitars and computer interfaces all of which require quality passive DIs. Our lives changed when we started carrying our own Radial DIs on the road and have never had a single issue or breakdown. We use the ProDI, ProD2 and the JDI on bass. Our Radial Direct Boxes are rugged, reliable, and sound great - so much better than the competition - in fact there is no competition!"
Electrik Band, Miles Davis, Return to Forever
"Radial direct boxes make everything I put through them warm, punchy and clear. They are great DIs!"
King Crimson, Frank Zappa, David Bowie, Talking Heads, Peter Wolf, Paul Simon, Nine Inch Nails, Tori Amos, Cindy Lauper
"Radial makes products no one else has thought to make and builds them better than anyone else can."
Mother Mother
"Radial gear is the best. From the indestructible JDI, killer SGI, and the flexibility of the ToneBone PZ Pre, I rely on these amazing products every show. Everyone in Mother Mother uses Radial or Tonebone devices. These amazing products help to articulate our individual expression."
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Orders placed though the Amber Technology website are despatched from our Sydney warehouse. Orders placed before 1.00pm Sydney time (for items in stock) will generally be shipped on the same day.
We ship using Startrack Express. We deliver Australia-wide to residential, business and PO box addresses.
Shipping is free for all orders over $275 including GST (effective 1 March 2018). There is a $22 (including GST) shipping and handling charge for all orders under $275 including GST.
You can track your shipment through the web sites of our couriers:
Star Track Express
Tracking numbers for your order can be found in the order history section of your dashboard. If you have any questions regarding shipping, please contact us.
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.
All items purchased from Amber Technology will be covered under warranty. The duration and terms of this warranty are specified by the manufacturer unless otherwise stated. Warranty information is available on the individual product listings on this site.
Refurbished items will include a 12 month warranty unless otherwise stated.Please contact us if you have received an item which has been damaged in transit or is otherwise not working correctly when you receive it. Subject to availability, we will arrange for a replacement item to be despatched and for the faulty item to be returned to us.
Amber Technology maintains a nation-wide network of carefully selected Authorised Service Agents to ensure that you are never far from convenient, expert technical and service support. If your item develops a problem and requires servicing under warranty, please contact your local Authorised Service Agent.
The availability of stock is communicated via the indicator of each product listing page. "Available" means that reasonable stock is in our warehouse, ready for immediate shipment. "Limited Stock" means that we have only a small number of items in stock. "Out of Stock" means this item is currently unavailable for immediate shipment - orders placed for ‘Out of Stock’ items will be fulfilled as soon as replacement stock arrives.
"Special Order” items are products that are not generally kept in stock in Australia. Lead times for Special Order items vary depending on country of origin, manufacturer’s stock levels, factory production schedules and/or incoming shipment transit times. Please contact us for an estimate as to the likely lead time. Please note that finalized sales for special order items cannot be cancelled.
If refurbished stock is available, this will be shown on the summary page for the product. If a product listing only allows you to choose refurbished stock, we are not holding new stock and we can no longer obtain new stock.
Refurbished items are always in perfect working order and will include all accessories. Refurbished items are may
Refurbished items include a 12-Month warranty unless otherwise stated.
Please visit the Get Support page to find a service agent, log a service ticket, or ask a technical question about your product.
Please contact us if you have received an item which has been damaged in transit or is otherwise not working correctly when you receive it. Subject to availability, we will arrange for a replacement item to be despatched and for the faulty item to be returned to us.