Radial Engineering

Radial Engineering SB2 StageBug Passive Instrument DI Box

4.7 (95 reviews)

Compact DI Box for Studio or StageThe Radial StageBug SB-2 is a passive direct box that allows you to connect your instrument directly to a mixing console. Get warm, vintage-flavored direct sound from your bass, keyboard, or acoustic guitar. Type: Passive Direct Box Transformer: Eclips...

$94.99*
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*Price sourced from Amazon.com. Last updated:Jun 26, 2026.Price and availability are subject to change.

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Overview

Compact DI Box for Studio or Stage

The Radial StageBug SB-2 is a passive direct box that allows you to connect your instrument directly to a mixing console. Get warm, vintage-flavored direct sound from your bass, keyboard, or acoustic guitar.

  • Type: Passive Direct Box
  • Transformer: Eclipse ET-DB3
  • Applications: Bass, keyboards, and acoustic guitar
  • Attenuation: 15dB Pad
  • Feature: Stereo-to-mono Merge

Key Features

Passive Direct Box with Eclipse ET-DB3 Transformer

Stereo-to-mono Merge

15dB Pad

Specifications

Type
Passive Direct Box
Transformer
Eclipse ET-DB3
Signal Feature
Stereo-to-mono Merge
Attenuation Pad
15dB

Pros & Cons

👍 Pros

  • Features an Eclipse ET-DB3 Transformer for clear and robust audio signal conversion.
  • Offers a stereo-to-mono merge function, simplifying complex signal routing from stereo sources.
  • Includes a 15dB pad, useful for attenuating hot signals from high-output instruments to prevent clipping.
  • Provides passive operation, meaning no external power is required, enhancing portability and setup ease.
  • Designed by Radial Engineering, known for building durable pro audio accessories, implying reliable construction.

👎 Cons

  • As a passive DI box, it may not provide gain or impedance matching for extremely low-output or high-impedance instruments as actively powered DIs would.
  • The stereo-to-mono merge function is specific to converting stereo signals and does not offer full stereo output.
  • The 15dB pad is a fixed attenuation level, which might not be perfectly suited for every possible input signal strength.
  • Does not include any ground lift switch, which could be a limitation in resolving hum and ground loop issues in some setups.
  • The product is a single instrument DI box, meaning only one instrument can be processed through it at a time.

Frequently Asked Questions

The Radial Engineering SB2 StageBug Passive Instrument DI Box incorporates an Eclipse ET-DB3 Transformer, designed for high-quality signal conversion.
Yes, the SB2 StageBug features a stereo-to-mono merge function, allowing it to combine stereo instrument signals into a single mono output.
Yes, the unit includes a 15dB pad, which can be activated to attenuate hot signals from instruments, preventing input overload.
No, the SB2 is a passive direct box, meaning it does not require any external power source or batteries for its operation.
The SB2 StageBug is a single instrument DI box, designed to process one instrument's signal at a time, making it ideal for individual inputs rather than multiple concurrent sources.