Radial Engineering StageBug SB-6 Stereo Audio Isolator & Ground Loop Eliminator for Professional Audio Systems

Product Introduction

The Radial Engineering StageBug SB-6 is a professional two-channel passive stereo audio isolator designed to eliminate hum, buzz, and unwanted noise caused by ground loops in audio systems. Whether you're connecting instruments, guitar pedalboards, audio interfaces, mixers, powered speakers, consumer electronics, or professional audio equipment, the SB-6 provides clean, transparent signal isolation without compromising sound quality.

Built with premium Eclipse custom isolation transformers, the StageBug SB-6 delivers exceptional audio performance with an ultra-flat frequency response from 20Hz to 20kHz, ensuring your sound remains natural and accurate while removing unwanted noise and interference.

Compact, rugged, and completely passive, the SB-6 requires no external power, making it an essential troubleshooting tool for live sound engineers, musicians, AV installers, churches, recording studios, and conference facilities.

Product Description

Ground loops are one of the most common causes of hum and buzz in professional audio systems. The StageBug SB-6 solves this problem using two high-performance isolation transformers that safely isolate the signal path while maintaining excellent audio fidelity.

Unlike basic noise filters that degrade sound quality, the SB-6 preserves full frequency response and dynamic range while eliminating unwanted electrical interference.

The dual-channel design accommodates both balanced and unbalanced audio signals, making it ideal for stereo systems, guitar rigs, keyboard setups, powered speakers, DJ systems, conference rooms, and multimedia installations.

Additional professional features include independent Ground Lift switches for each channel, a -15dB input pad to prevent distortion from high-output devices, and a 180° polarity reverse switch to correct phase cancellation issues when using multiple speakers or amplifiers.

The rugged 14-gauge steel enclosure is built to withstand demanding stage, touring, rental, and installation environments.

Key Features & Benefits

Professional stereo audio isolator for balanced and unbalanced signals

Eliminates hum, buzz, and ground loop noise

Premium Eclipse custom isolation transformers

Ultra-flat frequency response from 20Hz to 20kHz

Preserves audio clarity without signal coloration

Supports both consumer and professional audio equipment

Dual-channel design for stereo systems

Independent Ground Lift switches on each channel

-15dB input pad prevents overload and distortion

180° polarity reverse switch corrects phase issues

Passive operation with no power required

Automatically adapts to Hi-Z and Lo-Z signal chains

Rugged steel construction for professional use

Compact and portable design for easy installation

Common Problems & Solutions

Problem: Hum and Buzz in Audio Systems

Ground loops often create annoying hum and buzz when connecting multiple audio devices.

Solution:

The SB-6 uses transformer isolation and independent Ground Lift switches to eliminate ground loop noise and restore clean audio performance.

Problem: Noise Between Computers, Mixers and Powered Speakers

Audio systems that combine consumer electronics and professional equipment often experience electrical interference.

Solution:

The SB-6 safely isolates the signal path while maintaining audio quality, eliminating unwanted electrical noise.

Problem: Distortion from High-Level Audio Signals

High-output devices can overload audio inputs and create distortion.

Solution:

The integrated -15dB pad reduces incoming signal levels and prevents clipping.

Problem: Phase Cancellation Between Speakers

Multiple speakers or amplifiers can sometimes operate out of phase, causing weak bass response and uneven sound.

Solution:

The 180° polarity reverse switch corrects phase alignment for improved audio consistency and performance.

Problem: Need a Noise Solution Without Power Requirements

Many audio processors require power supplies, batteries, or complex setup.

Solution:

The SB-6 is completely passive and operates without any power source, making installation quick and reliable.

Ideal Applications

• Professional PA Systems

• Church Audio Systems

• Recording Studios

• Conference Rooms

• Corporate AV Installations

• Powered Speaker Systems

• DJ Audio Systems

• Guitar Pedalboards

• Stereo Guitar Racks

• Keyboard Setups

• Broadcast Facilities

• Hotel Ballroom Audio Systems

• Rental & Event Production Companies

• Educational Institutions

Technical Specifications

• Audio Circuit: Passive Transformer-Based Isolation

• Transformer: Eclipse Custom Isolation Transformers

• Frequency Response: 20Hz – 20kHz (±1dB)

• Dynamic Range: >140dB

• Gain: -2dB

• THD: <0.0008% @ 1kHz

• Input Impedance: Variable / 47kΩ

• Output Impedance: 600Ω

• Maximum Input: >+25dBu

• Input Connectors: 1/4" TRS

• Output Connectors: 1/4" TRS

• Features: Ground Lift, -15dB Pad, 180° Polarity Reverse

• Construction: 14-Gauge Steel Chassis

• Weight: 408g

• Power Requirement: Passive – No Power Required

Highlights

Eliminates Hum, Buzz & Ground Loop Noise

Premium Eclipse Isolation Transformers

Supports Balanced & Unbalanced Audio Signals

Stereo Audio Isolation Solution

Ground Lift & Polarity Reverse Controls

No Power Supply Required

Ideal for PA Systems, Studios & AV Installations

Preserves Audio Quality Without Signal Loss

Professional Audio Troubleshooting Tool

Trusted Radial Engineering Performance