Details

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Radial Engineering StageBug SB-15 Signal Buffer & 9V to 15V Power Converter for Pedalboards, Guitar Effects & Professional Audio Systems

Product Introduction

The Radial Engineering StageBug SB-15 is a premium Class-A signal buffer and power conversion solution designed for guitarists, bassists, pedalboard enthusiasts, and professional musicians who demand uncompromised tone quality. Featuring a 100% discrete Class-A FET buffer circuit and Radial's unique Drag™ Control technology, the SB-15 preserves the natural character of your instrument while eliminating signal degradation caused by long cable runs and multiple effect pedals.

In addition to serving as a high-performance signal buffer, the SB-15 also functions as a 9V to 15V DC converter, allowing musicians to power compatible Radial and Tonebone pedals directly from standard pedalboard power supplies. Compact, rugged, and pedalboard-friendly, the StageBug SB-15 is an essential tool for maintaining pristine tone and reliable pedalboard performance.

Product Description

As pedalboards become larger and more complex, signal loss, tone degradation, and unwanted noise can significantly affect overall sound quality. The StageBug SB-15 solves these common problems by buffering the instrument signal at the beginning of the signal chain, ensuring maximum clarity and consistency throughout the entire pedalboard.

Unlike conventional buffers that rely on integrated circuits (ICs), the SB-15 utilizes a 100% discrete Class-A FET design that delivers a warmer, more natural response with minimal phase distortion. The built-in Drag™ Control circuit allows players to fine-tune the input load, recreating the feel and tonal response of plugging directly into an amplifier.

Once buffered, the signal becomes more resistant to hum, buzz, radio frequency interference (RFI), and electromagnetic interference (EMI), enabling pedal chains and cable runs up to 15 meters (50 feet) without sacrificing audio quality.

As an added bonus, the SB-15 can combine two standard 9V power outputs and convert them into a regulated 15VDC output, making it easy to power Radial Tonebone pedals and other compatible 15V devices from your existing pedalboard power supply.

Key Features & Benefits

✓ 100% Discrete Class-A FET Buffer

Provides transparent signal buffering while preserving the natural tone and dynamics of your instrument.

✓ Drag™ Control Technology

Simulates the feel and tonal response of connecting directly to an amplifier for a more natural playing experience.

✓ Eliminates Tone Loss

Prevents high-frequency signal degradation caused by long cables and multiple pedals.

✓ Drives Pedal Chains up to 15m (50ft)

Maintains signal integrity across large pedalboards and extended cable runs.

✓ Reduces Noise & Interference

Minimizes hum, buzz, radio frequency interference, and electromagnetic noise.

✓ 9V to 15V Power Conversion

Converts dual 9V outputs from a pedalboard power supply into a regulated 15VDC output.

✓ Perfect for Radial & Tonebone Pedals

Ideal for powering 15V Radial and Tonebone effects pedals without requiring dedicated adapters.

✓ Ultra-Compact Pedalboard Design

Small footprint makes installation easy on crowded pedalboards.

✓ Rugged Steel Construction

Built with heavy-duty 14-gauge steel for touring, studio, and professional stage use.

Solutions & Applications

Guitar Pedalboards

Restore lost tone and maintain consistent signal quality throughout large pedal chains.

Bass Guitar Systems

Preserve low-frequency response and dynamic range for passive and active bass setups.

Live Performance Rigs

Ensure clean, reliable audio transmission on stage while reducing noise and interference.

Studio Recording

Capture the true sound of your instrument with minimal coloration and maximum signal integrity.

Worship & Church Audio Systems

Maintain clear instrument signals over longer cable runs to stage boxes and mixers.

Powering Tonebone Pedals

Convert dual 9V power outputs into a regulated 15V supply for compatible Radial and Tonebone devices.

Technical Specifications

Audio Performance

• Circuit Type: Class-A FET Buffer
• Frequency Response: 20Hz – 30kHz
• Dynamic Range: 104dB (Dual 9V Supply)
• Dynamic Range: 98dB (Single 9V Supply)
• Gain: 0dB (Unity Gain)
• Maximum Input Level: +16dBu
• Clip Level: +16dBu
• Total Harmonic Distortion (THD): 0.01% @ 1kHz
• Intermodulation Distortion: 0.004%
• Phase Deviation: <5° at 20Hz
• Input Impedance: 22KΩ – 500KΩ
• Output Impedance: 4.7KΩ
• Noise Floor: -88dBu

Features

• Drag™ Control Load Correction
• Signal Buffer
• 9V to 15V DC Converter
• EMI & RFI Noise Reduction

Connectivity

• Input: Standard 2.1mm Barrel Connector (Center Negative)
• Output: Standard 2.1mm Barrel Connector (Center Positive)

Power Requirements

• Dual 9VDC 400mA Recommended
• Single 9VDC 100mA for Buffer Function Only
• Output Voltage: +15VDC 400mA

Construction

• Material: 14-Gauge Steel
• Dimensions: 114 x 47 x 34 mm
• Weight: 250g

Operating Conditions

• Operating Temperature: 5°C to 40°C
• For Indoor Dry Locations Only

Why Choose the Radial StageBug SB-15?

• Premium 100% Discrete Class-A Buffer Design
• Maintains Natural Instrument Tone
• Reduces Noise, Hum & Signal Loss
• Supports Long Cable Runs up to 15m (50ft)
• Exclusive Drag™ Control Technology
• Converts Dual 9V to Regulated 15VDC
• Ideal for Professional Pedalboards
• Trusted Radial Engineering Audio Quality
• Compact, Durable & Tour-Ready Construction

Perfect For

Guitarists • Bass Players • Pedalboard Builders • Worship Musicians • Recording Studios • Live Sound Engineers • Touring Professionals • Professional Audio Systems