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Radial JDI 1-Channel Passive Instrument DI Box

Radial JDI 1-Channel Passive Instrument DI Box
Radial JDI 1-Channel Passive Instrument DI Box
Radial JDI 1-Channel Passive Instrument DI Box
Radial JDI 1-Channel Passive Instrument DI Box
Radial JDI 1-Channel Passive Instrument DI Box

Radial JDI 1-Channel Passive Instrument DI Box

Item #110841
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USD$199.99 Request Price Match

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Radial JDI Passive DI for Acoustic Guitar

World's Finest DI

The world’s finest passive direct box, the Radial JDI, brings unprecedented sonic transparency and simplicity – allowing the artist to be free of hassle and focused in on their music.

Pure Sound of the Instrument
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.

JDI with Electric Bass
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.

JDI with Acoustic Guitar
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.

JDI with Keyboards
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.


  • Jensen Transformer equipped passive DI
  • Eliminates hum and buzz from ground loops
  • Virtually zero phase & harmonic distortion
  • Exceptional signal handling and noise rejection
  • -15dB PAD
    Reduces the input sensitivity for active basses and high output keyboards
  • Merge
    Turns the input & thru jacks into a passive mixer to sum stereo signals to mono.
  • Input
    1/4" input jack for instrument and line-level sources.
  • Thru
    1/4" thru-put jack passes instrument's signal to stage amp. Converts to an input when "Merge" function is engaged.
  • XLR Out
    1/4"Balanced 150Ω mic-level output wired to the AES standard with pin-1 ground and pin-2 hot.
  • 180°
    Polarity reverse used to correct the phase on old gear and reduce feedback on stage.
  • Ground
    Disconnects pin-1 at XLR output to reduce hum and buzz caused by ground loops.
  • Ground
    Disconnects pin-1 at XLR output to reduce hum and buzz caused by ground loops.
  • Speaker
    Inserts a -30dB pad and speaker emulation filter that allows the JDI to be connected in parallel with a speaker cab
  • Jensen Transformer
    Nickel core for the best signal transfer and MuMETAL® shield for protection against EMI.
  • 14-Gauge Steel
    I-Beam construction prevents circuit board from torque which could lead to part failure.
  • MIL-Spec PCB
    Full ground plane for noise-free performance, double sided for durability.
  • Metal Switches
    Rated at over 20,000 cycles for added durability and years of use.
  • Warranty:Radial 3-year, transferable


  • Audio circuit type: Passive, transformer based
  • Transformer: Jensen JT-DBE
  • Number of channels: Single channel (mono)
  • Frequency response: 20Hz ~ 20KHz (± 0.2dB)
  • Dynamic range: 135dB
  • Total harmonic distortion: 0.05% from 20Hz ~ 20kHz @-10dB
  • Phase Deviation: 0.3° @ 100Hz; 3° @ 20Hz
  • Input Impedance: 140k Ohms, unbalanced
  • Output Impedance: 150 Ohms, balanced
  • Maximum Input: +21dB @ 20Hz ~ 20kHz
  • Features
    • Input pad, Mono Sum, 180° polarity reverse, Ground lift, Speaker filter
  • General
    • Construction: 14 gauge steel chassis & outer shell
    • Finish: Durable powder coat
    • Size (L x W x D): 5" x 3.3" x 1.8" (127mm x 84.1mm x 45.5mm)
    • Weight: 1.55 lbs (703 grams)
    • Shipping size (L x W x D): 6.5" x 4" x 3" (165mm x 102mm x 76mm)
    • Shipping weight:1.92 lbs (870.9 grams)
    • Power: Passive, no power required
    • Conditions: For use in dry locations only between 5°C and 40°C
… [ More ]
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