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Radial Engineering Radial Engineering

Radial Engineering HDI High Definition Studio Direct Box

Q&A SKU #L76190000000000
949.99 $949.99
20 $20/mo. with 48 months financing*
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Get natural tube-style distortion, smooth compression and more in a D.I. box.

The Radial HDI direct box brings a unique take to the world of D.I.s. With its unique Color control, opto-compressor and custom, oversized Jenson transformer, it can function as a straight D.I., as a ultra-clean bass preamp or add some fire-breathing distortion to the signal from your guitar amp. In fact, calling the HDI simply a direct box doesn’t begin to cover the creative possibilities you’ll find in the studio for electric and acoustic guitars, bass, synths, electronic keyboards and much more.


  • Dial in an amazing tone within seconds
  • Blend from ultra-clean to amp-like distortion
  • Smooth Opto compressor for peak reduction
  • Mic and line-level outputs
  • Oversized custom-wound Jensen transformer

Click or call to order this ultra-versatile direct box today.


HDI High Definition Studio Direct Box Specifications:

  • Front panel switchable hi/lo impedance TS input and Thru output jacks, rear TS input
  • Rear panel 3.5mm mono input for modular synths
  • Rear panel TRS and XLR balanced line/mic level outputs
  • Rear panel TS output place post-Color, Opto and Presence controls
  • Built-in optical compressor for peak reduction
  • Color control adds natural, tube-like saturation and distortion
  • High Pass Filter (HPF) rolls off excess bass
  • Presence control to accentuate mid and high frequencies
  • Quick-response front-panel VU meter

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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
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  • Orders placed before 3 p.m. ET usually ship the same business day.
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2-Year Free Warranty on Guitars

Every guitar or bass you purchase from Musician's Friend (electric or acoustic, New or Open Box) includes two years of protection from manufacturer defects.

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