Radial Engineering StageBug SB-15 Tailbone Signal Buffer

PA SKU # RE SB15TAILBONE MFR # R800 0115 UPC # 676101041152
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  • Product Highlights
  • 100% Discrete Class-A Buffer
  • Drag Control Load Correction
  • Drives Pedals to 50'
  • Converts Two 9V Supplies to 15 VDC

Combination Buffer and 2x9V to 15V Converter for Tonebones

The Radial 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') 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.

  • 100% Discrete Class-A Buffer
  • Drag Control Load Correction
  • Drives Pedals to 50'
  • Converts Two 9V Supplies to 15 VDC
  • Audio Circuit Type: Class-A FET buffer
  • Frequency Response: 20 Hz to 30 kHz
  • Total Harmonic Distortion: 0.01% @ 1 kHz
  • Dynamic Range:
    104 dB with dual 9 V supply
    98 dB with single 9 V supply
  • Input Impedance: 22 to 500 kOhms
  • Output Impedance: 4.7 kOhms
  • Maximum Input: 16 dBu
  • Gain: 0 dB (unity gain)
  • Clipping Level: Output: 16 dBu
  • Noise Floor: -88 dBu
  • Intermodulation Distortion: 0.004%
  • Phase Deviation
  • Audio Connections: 1/4" unbalanced Hi-Z in / out
  • Controls: Drag control load correction circuit
  • Power Input: Dual 9 VDC, 200 mA for optimal performance 1
  • Power Input Connector: Standard 2.1 mm barrel with center negative (-)
  • Power Output Connector: Standard 2.1 mm barrel with center positive (+)
  • Power Output: 15 VDC, 400 mA
  • Construction: Steel enclosure
  • Operating Conditions: For use in dry locations only between 41 to 104°F (5 to 40°C)
  • Dimensions (L x W x D): 4.50 x 1.85 x 1.35" (11.40 x 4.70 x 3.40 cm)
  • Weight: 0.55 lb (0.25 kg)
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