Radial JDI Duplex Stereo Direct Box

£399.00 (including VAT @ 20%)

2 In StockDelivery Information

Item in stock at our Distribution Centre in York

We currently have this item in stock at our Distribution Centre in York, ready for dispatch.

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30 day money back guarantee included

30 day money back guarantee included

Once the product is delivered, you have 30 days to decide that you definitely want to keep it. If you decide it is not suitable for any reason, you can return it back to us for replacement or full refund, including standard delivery charges.

All Products are new unless stated, and include a minimum of one year warranty.

Some items are only eligible for money back guarantee if they are returned to us unused and sealed in the original packaging, and in the case of software, unregistered. These items include:

  • Software
  • CDs & DVDs
  • In-ear Monitors
  • Earplugs and Ear Protection
  • Mouthpieces, Reeds etc… for Woodwind and Brass instruments
  • Mouth / Lip Care Products

We are unable to accept returns of any custom made items designed to work together as a unique package, such as computer system built to a customer’s personal specifications. Exceptions may only be possible with prior agreement of the vendor, and may be subject to a cancellation fee.

Optional: 5 year warranty: £19.95
(Includes 90 day money back guarantee)


The product price includes a one year warranty and 30 day money back guarantee.

However, the Gear4music extended warranty scheme provides an enhanced service, and is designed to offer a higher level of protection than many 'free' warranties offered by some retailers and manufacturers.

The highlights of this enhanced warranty service are:

  • Warranty is extended to 5 years from the date of delivery.
  • Our Money Back guarantee is extended from 30 days to 90 days (terms apply after 30 days)
  • Collection and delivery costs are included for the first two years
  • Claim 50% cash back on the cost of the policy after 5 years if it has not been used!
  • Warranty is transferable if the item is re-sold
  • Loan or replacement equipment will be provided if the product isn't repaired within 30 days
  • If an item can not be repaired, a similar alternative product or cash discount (as defined in this policy) will be offered
  • The policy can be cancelled within 30 days, and at any time after that for a pro-rata discount

Please note that this extended warranty is currently only available on products sold within the EU or EEA, and is subject to the terms and conditions as detailed on the extended warranty certificate provided.

For customers in outlying areas of the country, the price of the Extended Warranty may be marginally higher, due to the potential for higher collection and redelivery transport costs.

This enhanced warranty is in addition to the standard Gear4music and manufacturer warranty policies, and the Gear4music terms and conditions of trade. No statement or condition of sale contained within these terms affects or restricts your statutory rights as defined under the Consumer Contracts Regulation 2014.

Product Ref: 46239

  • Stereo Direct Box For High Output Sources
  • Ultra Linear Response From 10Hz To 40kHz
  • Virtually Zero Phase & Harmonic Distortion
  • Eliminates Hum And Buzz From Ground Loops

Radial JDI Duplex Stereo Direct Box


The Radial JDI Duplex is a full-feature, stereo passive direct box built to improve connectivity, minimize noise, and make things easier for the touring professional, broadcast engineer or AV integrator. Simply plug in and play whilst providing the best sonic quality.

Product Ref: 46239

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  • 15.9%
  • £13.97
  • £502.92
Pay by Finance

To make it as easy as possible for you to get the gear you want, we offer a range of instant finance options. If you spend £250 or more online, you can choose to pay over 48, 36 or 24 months. The majority of decisions are given instantly, so you could get your new gear sooner than you thought!

Representative Example

To help you understand how our finance options work, the examples below are based on a total order value of £250:

Finance APR Deposit to Pay Payments Total Payable
Classic Credit 48 Months 14.9% 14.9% No Deposit 48 months: £6.83
Final payment: £6.83
No settlement fee
Classic Credit 36 Months 15.9% 15.9% No Deposit 36 months: £8.65
Final payment: £8.65
No settlement fee
Classic Credit 24 Months 18.9% 18.9% No Deposit 24 months: £12.41
Final payment: £12.41
No settlement fee

How to Apply

Applying for finance couldn't be easier - if your order totals £250 or more, simply proceed through the checkout as normal, then select Pay by Finance on the payment page, then click the orange APPLY FOR INSTANT FINANCE button. This will start your application with V12 Retail Finance, our finance partner, and completing this form should take approximately 10 minutes.

You should get an instant answer on whether your application has been successful, though in some rare cases V12 may need to look at the application in more detail.

Please note: This is only available on orders placed via the website and is not available in store or via phone currently.

Full Description

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  • Comments from customers who bought this item:

The JDI Duplex uses two high-performance 'made in the USA' audio transformers with the same pristine audio signal path that has made JDI the industry standard. It features brilliant signal handling with virtually zero phase shift or harmonic distortion, whilst keeping linear across the whole audio spectrum. The natural transformer saturation and resulting warm Bessel curve makes the Radial Duplex the best choice for smoothing out extremely dynamic instruments such as digital pianos and electronic drums that can sound harsh when pushed. Transformer isolation offers the extra benefit of removing pesky ground loops that can cause hum and buzz in the audio system and interfere with video displays.

This DI is loaded with 1/4' connectors for instruments, RCA connectors for unbalanced -10dB consumer electronics and XLR inputs for +4dB professional line sources. The 14 gauge I-beam inner frame makes the JDI extremely rigid to take away outside stresses that could torque the PC board and cause premature solder joint and trace failure. The steel outer shell combined with the transformer's mu-metal shield protects against stray magnetic fields from power transformers or lighting systems that could cause interference. A full-bottom no-slip pad works double-duty to provide both mechanical and electrical isolation. The Radial Duplex delivers outstanding connectivity, superlative audio and quiet dependable performance.


  • Stereo Direct Box For High Output Sources
  • Ultra Linear Response From 10Hz To 40kHz
  • Virtually Zero Phase & Harmonic Distortion
  • Eliminates Hum And Buzz From Ground Loops