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  4. Radial Stagebug SB-1 Acoustic Active DI Box
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Radial Stagebug SB-1 Acoustic Active DI Box
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Radial Stagebug SB-1 Acoustic Active DI Box

Product Code: 310040

The Radial StageBug SB-1 is a high-performance active direct box made for players that are on the move.

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Radial Stagebug SB-1 Acoustic Active DI Box

The Radial SB-1 Acoustic is a high-performance active direct box made for players that are on the move. Made to fit inside a guitar case, the SB-1 is the smallest Radial DI box ever!

The design begins with standard ¼" instrument input with a thru-put to feed your tuner or your on-stage amp. The ultra quiet active circuit at once converts the signal from high to low impedance to reduce susceptibility to noise, buffers it and then balances the signal for long runs to the PA system. And with 48 volt phantom powering, the SB-1 does not require batteries or external supply to make it work. You simply plug in and you are set to go!




  • Active direct box for acoustic guitar
  • Ultra compact to fit in your guitar case
  • Plug & play easy to use feature set
  • 48V phantom powered, no batteries needed!





Acoustic guitar live

  • The StageBug SB-1 is plug & play easy to use. Connect and it automatically converts your Hi-z instrument signal to lo-Z and balances it for long runs.


Recording bass direct

  • Record your bass direct using the StageBug SB-1. This improves the tone and reduces noise by properly matching the impedance of the instrument.


Adding an amp or tuner

  • Use the SB1 thru output to feed your on-stage amplifier. For fun, add pedals after the SB-1 to color your tone on-stage while leaving the PA signal clean.
  • * Audio circuit type: Active Buffer with Phase Splitter
  • * Number of channels: 1
  • * Frequency response: 20Hz to 20KHz
  • * Dynamic range: >100dB
  • * Gain: +1.3dBu/+4.4dB
  • * Clip Level: +3.3dBu/+12.3dBu
  • * Total harmonic distortion: <0.006%
  • * Intermodulation Distortion: <0.01%
  • * Phase Deviation:: 25/12° Maximum
  • * Input Impedance: 800K/23K
  • * Output Impedance: 330 Ohms​-15°C to +55°C
  • * Equivalent Input Noise: -101dBu
  • * Noise: -97dBu
  • * Maximum Input: +2dBu/+8dBu
  • * Construction: 16 gauge steel chassis & outer shell
  • * Size (L x W x D): 114mm x 47mm x 34mm
  • * Weight: 250 grams
  • * Shipping weight: 365 grams
  • * Power: 48V phantom power, 5mA
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