Radial Engineering

collapse expand iconDescription

Radial Engineering's JDI MK3 is a professional-grade passive direct box equipped with a premium Jensen transformer, designed to capture instruments with pristine accuracy. The JDI MK3 is a nearly indestructible DI perfect for connecting electric guitars, basses, keyboards and more to recording interfaces, mixing consoles and PA systems.

Jensen Transformer Provides Optimal Isolation

At the heart of the JDI MK3 is a high-performance Jensen JT-DBE transformer that eliminates buzz, hum and ground loops. Its nickel core and low-permeability design remove phase distortion for a clean, transparent signal. The transformer fully isolates the input from the output, allowing high input levels without overloading connected equipment.

Extremely Low Distortion for Natural Tone

With near-zero phase and harmonic distortion, the JDI MK3 accurately captures the full tone of any instrument. Its frequency response is ruler-flat, preserving the natural highs, lows and everything in between. This high fidelity makes the JDI MK3 an excellent choice for both live and studio applications where maintaining tonal integrity is critical.

Built to Handle High Levels and Extreme Conditions

From its 14-gauge welded steel construction to its durable baked enamel finish, the JDI MK3 is built to survive. It withstands high input levels that would overload other DIs and its protective bookend design shields switches from damage. Inside, a locked skeletal frame protects sensitive components from external stress. This rugged dependability allows for worry-free use on stages and in abusive environments.

Maximum Flexibility for Any Setup

With input pad, polarity reverse and ground lift switches, the JDI MK3 adapts to any installation for optimal performance. Its input pad reduces the signal by 15dB to prevent overloading connected equipment, while the polarity reverse inverts pin 2 and 3 of the XLR output. The ground lift disconnects pin 1 to eliminate ground loops altogether. These features provide the flexibility to interface with virtually any audio system or instrument.

Radial Engineering JDI MK3 Passive Direct Box
Radial Engineering JDI MK3 Passive Direct Box
Radial Engineering JDI MK3 Passive Direct Box

collapse expand iconFeatures

  • 100% passive design - no phantom power
  • Jensen transformer equipped
  • Dual function inputs w/2 channel merge
  • Polarity reverse switch
  • Speaker level input circuit
  • Ultra-durable welded steel chassis
  • Double sided printed circuit board
  • Protective channel for switches
  • Ground Lift and Pad switches
  • No-slip bottom pad

WARNING: This product can expose you to chemicals including Titanium dioxide (airborne, unbound particles of respirable size), which is known to the State of California to cause cancer, and Lead, which is known to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

collapse expand iconSpecs

  • Dynamic range: 135dB
  • Signal to noise: 119dB
  • Maximum input level: +19dB
  • Frequency range: 10Hz40kHz
  • Linearity 2020kHz: 0.1dB
  • Phase coherence: 4 degrees at 20Hz
  • 0 degrees at 1kHz
  • Distortion at 20Hz: 0.006%
  • CMR rejection 100dB @60Hz
  • Input impedance: 10kW
  • Output impedance: 600W
  • Construction: Welded steel
  • Finish: Baked enamel
  • Input connectors: Two 1/4" phone
  • Output connectors: XLR male

collapse expand iconWarranty

90 day warranty on footswitch and tubes. One year warranty on all other products.

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