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BOSS BF-3 Flanger Best Guitar Effects Pedal Best Flanging Effects with Tap Tempo and Stereo Output


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Building on the 20-year legacy of the famous BOSS BF-2, the new BF-3 flanger pedal gives guitarists and bassists an updated version of the classic BOSS flanger with the thickest stereo flanging sounds ever. Two new modes (Ultra and Gate/Pan) create stereo flanging with incredible depth--even Slicer-type effects and sounds that seem to "swirl" around the listener. An instant classic.

- BOSS' best flanging effects in a compact pedal
- New Ultra and Gate/Pan modes for ultra-fat flanging and futuristic slicer-type sounds, respectively
- Momentary mode turns flanging on instantly
- Tap tempo adjustable via pedal
- Independent Guitar and Bass inputs and stereo outputs



1. What does the BOSS BF-3 pedal do?

  • The BOSS BF-3 is a flanger pedal that splits the signal into two. The duplicate audio is played at a lower speed than the original. It creates a “whooshing” chorus sound. It has four flanger modes. It also has knobs that let you control 5 different settings. It is one of the most complete modulation pedals out there!

2. Is the BOSS BF-3 easy to use?

  • Yes. The BOSS BF-3 is very easy to use. 

3. Is the BOSS BF-3 analog?

  • No. The BOSS BF-3 has a digital circuit.

4. Does the BOSS BF-3 require a battery?

  • Yes. The BOSS BF-3 uses a 9v battery.

5. What country is the BOSS BF-3 made in?

  • Taiwan

6. What is the difference between the BOSS BF-3 and the BF-2?

  • BOSS BF-3
    • Separate inputs for the bass and guitar
    • Stereo outputs
    • More Flange modes
    • Digital
  • BOSS BF-2
    • Only one input for the bass and guitar
    • Simpler modes
    • Analog

7. Where should the BOSS BF-3 go in the signal chain?

  • The BOSS BF-3 is a flanger pedal, it is usually placed toward the back of the signal chain.

8. Can I use the BOSS BF-3 as a tremolo effect pedal?

  • Yes. The BOSS BF-3 has a gate/pan mode that can create a tremolo effect. You can also control the knobs to get your desired sound.

9. Does BOSS BF-3 lose some of the low ends on the bass?

  • No. There isn’t any noticeable loss on the low ends.

10. Is the BOSS BF-3 a true bypass pedal?

  • No. The BOSS BF-3 is a buffered pedal.

11. Can I connect the two outputs simultaneously to two different pedals?

  • No. The cables would have to loop back to the chain.

12. Does the BOSS BF-3 still affect the signal when it is turned off?

  • Yes, to some degree. The BOSS BF-3 is not a true bypass pedal so it still might affect the signal.

13. Does the BOSS BF-3 work with bass?

  • Yes. The BOSS BF-3 has a separate input for the bass


  • Nominal Input Level: -20 dBu
  • Input Impedance: 1 M ohm
  • Nominal Output Level: -20 dBu
  • Output Impedance: 1 k ohm
  • Recommended Load Impedance: 10 k ohms or greater
  • Bypass: Buffered bypass
  • Controls: MODE knob, RATE knob, DEPTH knob, RES (Resonance)/MANUAL knob, Pedal switch
  • Indicator: CHECK indicator (Used for indication of check battery)
  • Connectors: GUITAR IN jack: 1/4-inch phone type, BASS IN jack: 1/4-inch phone type, OUTPUT A (MONO) jack: 1/4-inch phone type, OUTPUT B jack: 1/4-inch phone type, DC IN jack
  • Power Supply: Carbon-zinc battery (9 V, 6F22) or Alkaline battery (9 V, 6LR61), AC adaptor (PSA series: sold separately)
  • Current Draw: 40 mA
  • Expected battery life under continuous use: Carbon: Approx. 3 hours; Alkaline: Approx. 10 hours *These figures will vary depending on the actual conditions of use.
  • Accessories: Owner's manual, Leaflet ("USING THE UNIT SAFELY," "IMPORTANT NOTES," and "Information"), Carbon-zinc battery (9 V, 6F22), Options (sold separately): AC adaptor: PSA series

Size & Weight

  • Width: 73 mm (2-7/8 inches)
  • Depth: 129 mm (5-1/8 inches)
  • Height: 59 mm (2-3/8 inches)
  • Weight (including battery): 435 g (1 lb)

* 0 dBu = 0.775 Vrms.
* The specifications are subject to change without notice.

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