Boss BF-3 Flanger|Boss BF-3 Flanger is now part of! All the Boss pedals you love are still here, along with expert reviews of electric guitars, amps, and more.

The BF-2 had been around for more than 20 years when Boss decided to replace it with the BF-3. The BF-3 uses digital electronics instead of the BBD circuits used by older Flanger pedals. The BF-3 has two new modes, Ultra and Gate/Pan, that allows for unique Flanger sounds not possible with earlier Boss flanger pedals.


  • New Ultra and Gate/Pan modes
  • Very low noise thanks to digital elctronics
  • Momentary mode turns flanging on instantly
  • Tap tempo adjustable via pedal
  • Independent Guitar and Bass inputs and stereo outputs


Boss BF-3 Flanger
  • Controls: Res, Manual, Depth, Rate, 4-way Mode Switch
  • Connectors: Guitar Input, Bass Input, Output A, Output B, AC Adaptor
  • Current Draw: 40 mA (DC 9V)
  • Weight: 420g / 15 oz (including battery)
  • Nominal Input Level: -20dBu
  • Input Impedance: 1MOhm
  • Nominal Output Level: -20dBu
  • Output Impedance: 1kOhm
  • Residual Noise Level: -95dBu (IHF-A weighted, typ.)
  • Recommended Load Impedance: 10kOhm or greater
  • Delay Time: 0.3 ms ~ 14.4 ms (Guitar In), 0.3 ms ~ 6.3 ms (Bass In)
  • LFO Speed: 100 ms ~ 18 s
  • Recommended AC Adaptor: PSA Series


  • Dark Gray – Made In Taiwan

The BF-3 was sold from February 2002 to present.