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Radial Engineering JDV Super Direct Box

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The Radial JDV Mk5 is a high performance active direct box and preamp with two inputs that enables the user to seamlessly transition from one instrum...Click To Read More About This Product

Available 01-13-2018

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Active direct box and preamp with dual inputs.

The Radial JDV Mk5 is a high performance active direct box and preamp with two inputs that enables the user to seamlessly transition from one instrument to another while being able to optimize the signal chain no matter what the source.

The design begins with 100% discrete electronics and a unique class-A circuit with zero phase-cancelling negative feedback front-end. This is augmented with Drag™ control load correction that lets you optimize the impedance that is being applied to the pickup along with extra rail voltage for an abundance of headroom. The result is virtually zero harmonic, phase and cross-point distortion resulting in the most natural rendering without coloration or artifact of any type.

Central to the design is the JDV's ability to handle any type of instrument. Input-1 is equally well suited for magnetic pickups or active instruments and is equipped with a balanced mic input with 48V phantom to accept instrument-mounted condenser mics. Input-2 adds another dimension with a selectable 10 meg-ohm input to properly load piezo transducers. Both inputs may be active at one time and mixed together using the front panel controls. These can then be phase-aligned using the built-in Radial Phazer for what can only be deemed the most natural sounding reproduction of an acoustic instrument ever.

Extra features include fully variable high-pass filters on each channel to eliminate excessive low frequency resonance, easy-read LED level meters, Jensen Transformer isolated outputs to eliminate hum and buzz caused by ground loops and a +4dB line level output for direct recording. Switching between channels may be done using a front panel switch or via the optional JR-2 remote control.

  • 100% discrete class-A active direct box
  • Feed forward design – no negative feedback
  • Drag control load correction for natural tone
  • Huge 30-Volt rails for exceptional headroom

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Review Snapshot

by PowerReviews
Radial EngineeringJDV Super Direct Box

(based on 1 review)

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Reviewed by 1 customer

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Very High Quality Full Feature DI


from Cincinnati, OH

See all my reviews

Verified Buyer


  • Efficient Footprint
  • Full Feature DI
  • High Quality Preamp
  • Sturdy Construction


    Best Uses

    • Instrument Direct Recording and Monitoring

    Comments about Radial Engineering JDV Super Direct Box:

    If you are only going to purchase one direct box, this is the one to get. Provides both passive and active DI box capability. Supports microphone, line and instrument input. The box has two channels, I setup channel A for my Gibson Les Paul Custom with passive pickups and Channel B for my Martin acoustic guitar with built in Fishman Aura pickups for recording directly into Pro Tools. The recorded sound using the JDV at the front of the signal chain is much superior than recording either instrument directly into my computer interface without the JDV. For acoustic guitar recording, I have had great results simultaneously recording a direct signal through the JDV along with signals from small condenser microphones into
    separate tracks in Pro Tools; then sweeting, panning and mixing the three tracks together in post to obtain a rich acoustic performance.

    The JDV is so fully featured that it can support line input, passive and piezo guitar pickups, mic inputs. In essence, it is like having five single purpose direct boxes in your kit. A number of micro switches handles phase issues, ground issues, signal boosting, impedance adjustments, channel blending and other features. Each channel also has an adjustable HPF so you can dial down some of the low end mud before recording if you wish or need to.

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