Radial Stagebug SB-6 Isolator

A StageBug Built for the Field, in the Radial Spirit

The StageBug SB-6 follows Radial's philosophy of compact and rugged solutions: a format easy to slip into a case, yet built to withstand daily rigors (transport, stage, technical setups). Made in Canada and housed in a steel enclosure, it aims for a simple goal: secure audio connections and restore a clean signal without adding complexity to the setup.

An Isolator for Musicians, Technicians, and Hybrid Setups

The SB-6 is especially useful whenever you connect very different sources to a console, interface, or sound system: instruments with line outputs, keyboards, pedalboards, audio players, consumer devices, or professional equipment. It helps eliminate unwanted noise that often appears when interconnecting devices powered from different circuits or when a stereo signal passes through multiple links.

With its two channels, it is perfectly suited for stereo configurations (keyboard, module, player, laptop via interface, etc.) and also allows processing two separate lines. The polarity inversion on channel B is a real advantage for restoring stereo image phase when necessary.

Transformer Isolation, Practical Adaptation, and Phase Control

At the heart of the StageBug SB-6 is a passive circuit based on two Eclipse Custom transformers. This approach provides galvanic isolation of the connection to reduce hum and interference while maintaining a frequency response suitable for demanding audio use. The SB-6 is designed to accept both balanced and unbalanced signals and to integrate easily between your sources and line inputs.

Balanced/Unbalanced Compatibility and Quick Integration

The 6.35mm TRS Jack connectors facilitate integration into most setups. The SB-6 is designed to adapt to the type of connection used, simplifying cabling in the field. The result: plug in, isolate, and quickly recover a usable signal without adding power or modifying your audio chain.

Input PAD and Polarity Inversion

When the source is too strong, the input PAD attenuates the level to prevent overloading the next stage. On channel B, the 180-degree polarity inversion helps correct certain phase issues, especially in stereo configurations where cables, adapters, or devices may cause inversion.

Technical specifications

Category	Line isolator	Frequency response - end	20 kHz
Number of channels	1	Inputs	2 x jack
Digital conversion	No	Analog outputs	2 x jack
Max input level (dBu)	25	Power supply	Passive
Settings	-15 dB attenuator, ground lift switch	Weight	400 g
THD	5% @ 30 Hz	Dimensions (mm)	114 x 47 x 34
Frequency response - start	20 Hz

Circuit	passive with transformers	Phase deviation	>5 deg @ 30 Hz
Transformers	Eclipse Custom	Input impedance	varies with load / 47 kOhms
Manufactured in	Canada	Output impedance	600 Ohms
Enclosure	steel	Inputs / outputs	6.35mm TRS Jack
Frequency response	20 Hz to 20 kHz +/-1 dB	PAD	-15 dB
Dynamic range	>140 dB	Polarity	inverted at 180 degrees
Max input	>+25 dBu	Dimensions	114 x 47 x 34 mm
Gain	-2 dB