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The SYB-5 features a brand new DSP circuit and has 11 different synth modes. As with the SYB-3, the SYB-5 doesn’t need a bass guitar plugged in. You can also use a guitar, a drum machine or any device that produces a regular signal that can trig the synth circuit. The range for detecting pitch is from A0 to C5.


  • 11 DSP variations of Saw, Square, and Pulse synth waves
  • Control filter cutoff and LFO rate via EV-5 Expression Pedal (sold separately)
  • Enhanced Wave Shape Mode
  • Hold notes with the onboard pedal and play on top of the held notes
Boss SYB-5 Bass Synthesizer


  • 1. Saw Wave
  • 2. Saw Wave (-1 octave)
  • 3. Saw Wave (auto, changes depending on input signal)
  • 4. Square Wave
  • 5. Square Wave (-1 octave)
  • 6. Square Wave (auto, changes depending on input signal)
  • 7. Pulse Wave, sharp edged sound
  • 8. Pulse Wave with all pass filter, creates a sense of depth
  • 9. Pulse Width Modulation
  • 10. Up wave shape mode
  • 11. Down wave shape mode


  • Controls: Effect/Direct, Freq/Res, Decay Rate, 11 Way Mode switch
  • Connectors: Input, Exp, Outputs (A/Mono, B), AC Adaptor
  • Current Draw: 50 mA (DC 9V)
  • Weight: 450 g (1 lb.)
  • Input Impedance: 1MOhm
  • Nominal Output Level: -20dBu
  • Output Impedance: 1kOhm
  • Recommended Load Impedance: 10kOhm or greater
  • Recommended AC Adaptor: PSA Series

The SYB-5 was sold from July 2004 to present.