Radial (SB-2 PASSIVE) Direct Box - Passive

Passive DI Box for Bass, Guitar and Keyboard

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What's in the box:

  • Radial Engineering StageBug SB-2 Passive Direct Box
  • Limited 3-Year Transferable Warranty


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The Radial Engineering SB-2 is a high-performance passive direct box made for players that are on the move. Made to fit inside of a guitar case, the SB-2 is ultra compact yet is feature-packed to ensure great performance on any stage. Once connected, the SB-2 delivers a smooth warm sound reminiscent of older vintage gear. The Eclipse ET-DB3 transformer is magical in its ability to handle extreme signal levels with a natural compression that is pleasing to the ears. The transformer also helps eliminate hum and buzz caused by ground loops by isolating the input from the output. This is augmented with a ground lift switch that lifts pin-1 on the XLR for quiet, professional results.


  • Passive DI for bass, acoustic guitar, and keyboard
  • Ultra compact to fit in your guitar case
  • Plug & play easy to use features
  • Transformer isolation eliminates noise

Specifications for the Radial (SB-2 PASSIVE) Direct Box

{ "Audio circuit type:" : "Passive, transformer based", "Transformer:" : "Eclipse ET-DB3, 12:1 ratio", "Number of channels:" : "1", "Frequency response:" : "20Hz ~ 20KHz (± 0.5dB)", "Dynamic range:" : "115dB ", "Total harmonic distortion:" : "0.005% @ 1kHz", "Phase Deviation:" : "3° @ 100Hz; 8° @ 50Hz ", "Input Impedance:" : "140k Ohms, unbalanced ", "Output Impedance:" : "1k Ohms, balanced ", "Maximum Input:" : "+20dB ", "Features" : { "Input pad, Ground lift" : "", "Input Connectors:" : "1/4"", "Output Connectors:" : "XLR" }, "General" : { "Construction:" : "14 gauge steel chassis & outer shell", "Size (L x W x D):" : "4.5" x 1,85" x 1.35" (114mm x 47mm x 34mm)", "Weight:" : "0.55 lbs (250 grams)", "Shipping size (L x W x D):" : "8" x 5" x 3" (203mm x 127mm x 76mm)", "Shipping weight:" : "0.8 lbs (365 grams)", "Power:" : "Passive, no power required ", "Conditions:" : "For use in dry locations only between 5°C and 40°C" } }

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