Radial Engineering SB2 StageBug Passive Instrument DI Box — main product image

Radial Engineering SB2 StageBug Passive Instrument DI Box

Radial Engineering SB2 StageBug Passive Instrument DI Box

Name: Radial Engineering SB2 StageBug Passive Instrument DI Box
Brand: Radial Engineering
SKU: SB2

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:Aug 28, 2026.Price and availability are subject to change — details.

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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

Frequently Asked Questions

What type of transformer is used in the Radial Engineering SB2 StageBug?

The Radial Engineering SB2 StageBug Passive Instrument DI Box incorporates an Eclipse ET-DB3 Transformer, designed for high-quality signal conversion.

Can this DI box combine a stereo signal into a mono output?

Yes, the SB2 StageBug features a stereo-to-mono merge function, allowing it to combine stereo instrument signals into a single mono output.

Is there a way to reduce the input signal level when using high-output instruments?

Yes, the unit includes a 15dB pad, which can be activated to attenuate hot signals from instruments, preventing input overload.

Does the Radial Engineering SB2 require external power to operate?

No, the SB2 is a passive direct box, meaning it does not require any external power source or batteries for its operation.

Is this DI box suitable for use with multiple instruments simultaneously?

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.

Strengths & Trade-offs

👍 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.