Radial Engineering SB-15 Tailbone Combination Buffer and 2X9V to 15V Converter for Tonebones

The Radial Engineering StageBug SB-15 Tailbone is a high performance signal buffer designed to sit at the beginning of the signal chain and drive multiple pedals without the added noise that often plagues high impedance circuits.

The ultra-compact design begins with a standard Hi-Z instrument input. The signal is then 'tamed' using Radial's unique Dragster™ load correction circuit to replicate the tone and feel as if connected directly to the amplifier. The signal is then buffered via a 100% discrete, class-A unity gain amplifier. Unlike most others that employ ICs or integrated circuits to buffer the signal, the discrete design reduces the need for phase-cancelling negative feedback producing a more natural and pleasing tone. This is further advanced with the same award winning class-A buffer that is in the Radial JD7 and used by guitarists as diverse as Steve Vai, John Petrucci, Steve Lukather and many others. Once buffered, the Tailbone lowers the impedance and susceptibility to hum and buzz caused by radio interference and electromagnetic fields. The SB-15 is then able to drive multiple pedals distances of 15 meters (50 ft) without noise.

The SB-15 Tailbone is powered by a standard Boss-style 9V supply (not included). As an extra bonus, when using a Tonebone pedal that requires 15V on your pedalboard, you can combine two 9V outputs from your power brick and the Tailbone will convert them to 15VDC and provide the correct voltage polarity. This makes adding a high-end Tonebone to your pedalboard easy.

The Radial SB-15 Tailbone delivers exceptional sonic quality, reduces noise and adds the convenience of 15VDC power for your Tonebone.

Features

• 100% discrete Class-A buffer
• Drag™ control load correction
• Drives pedals to 15 meters (50 ft)
• Converts two 9V supplies to 15 VDC to power your Tonebone pedals

Specifications

• Audio Circuit Type: Class A FET buffer
• Frequency Response: 20 Hz to 30 kHz
• Dynamic Range: 104 dB with dual 9V supply, 98 dB with single 9V supply
• Gain: 0 dB (unity gain)
• Clip Level: +16 dBu
• Total Harmonic Distortion: 0.01% @ 1 kHz
• Intermodulation Distortion: 0.004%
• Phase Deviation: < 5° at 20 Hz
• Input Connector (Audio): 1/4"
  • Input Impedance: 22K to 500K
  • Noise: -88 dBu
  • Maximum Input: 16+ dBu
• Output Connector (Audio): 1/4"
  • Output Impedance: 4.7K
• Features: Drag control, optional second 9V DC 400mA for optimal performance
• Power: +15V DC 400mA
  • Input: 2 x standard 2.1mm barrel with center negative
  • Output: standard 2.1mm barrel with center positive
• Construction: 14-gauge steel
• Conditions: For use in dry locations only, 5-40°C
• Dimensions (H x W x D): 1.35" x 1.85" x 4.5"
• Weight: 0.55 lb (0.25 kg)