Item #: BOS BF3 LIST

Boss BF3 Flanger Pedal

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Product Description

Boss BF3 Flanger Pedal builds off the 20-year legacy of Boss' famous BF2.
The BF3 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 BF3 Features
  • BOSS' best flanging effects in a compact pedal
  • New Ultra and Gate Pan modes for ultra-fat flanging with very low noise
  • Momentary mode turns flanging on instantly
  • Tap tempo adjustable via pedal
  • Independent Guitar and Bass inputs and stereo outputs
  • BOSS 5-year warranty
Recognized by guitarists everywhere as the world's first name in compact effects pedals, BOSS makes sure you get the tone you want every time you play. Whether it be classic or hard rock, blues, jazz, country, funk or something new, wild and completely on the edge, BOSS helps you find your tone.

Beyond the killer effects pedals, BOSS is also constantly pushing the envelope to develop innovative multi-effects, rhythm machines and other easy-to-use instruments for musicians of all types. Put simply, BOSS gives you the great-sounding tools you need to spend more time making great music.
See all items from Boss
Helpful Info about the Manufacturer
Phone:  323-890-3700 Warranty:  BOSS Compact and Twin Pedals: 5 years parts, 2 years labor; BOSS (other): 1 year parts, 90 days labor

Product Specifications

Boss BF3 Flanger Pedal Specifications
  • Nominal Input Level: -20 dBu
  • Input Impedance: 1M ohms
  • Nominal Output Level: -20 dBu
  • Output Impedance: 1k Ohms
  • Recommended Load Impedance: 10k ohms or greater
  • Delay Time:
    • 0.3 mS to 14.4 mS (GUITAR IN)
    • 0.3 mS to 6.3 mS (BASS IN)
  • LFO Speed: 100 mS to 18 S
  • Residual Noise: -95 dBu (IHF-A Typ.)
  • Controls:
    • Pedal Switch
    • MANUAL Knob
    • RES (resonance) Knob
    • DEPTH Knob
    • RATE Knob
    • MODE Knob
  • Indicator: CHECK Indicator (also as tempo and battery check indicator)
  • Connectors:
    • GUITAR IN Jack
    • BASS IN Jack
    • OUTPUT A/MONO Jack
    • OUTPUT B Jack
    • AC adaptor Jack (DC 9V)
  • Power Supply: 9V battery or AC Adaptor (PSA-series: optional)
  • Current Draw: 40 mA (DC 9 V)
  • Expected battery life: Continuous Use
    • Carbon: 3 hours
    • Alkaline: 10 hours
  • Included Accessory: 9V battery
  • Optional Accessory: AC Adapter (BOS PSA120S)
  • Dimensions:
    • Width: 2 7/8 inches (73 mm)
    • Depth: 5 1/8 inches (129 mm)
    • Height: 2-3/8 inches (59 mm)
  • Weight: 15 oz (420 kg) including battery

Customer Reviews

Review: Bonehead Submitted: 8/30/2019

Product Rating5 out of 5 stars.


Product Rating

Product Review

Wide range of great sound. Boss quality makes it perfect

Review: Papa Joe Submitted: 5/22/2018

Product Rating3 out of 5 stars.



It's okay

Product Review

It's okay, just not quite as clean as I had hoped for.

Review: Dusty Submitted: 10/28/2016

Product Rating5 out of 5 stars.



Well worth the money

Product Review

Works great no issues, easy to use


Manuals & Docs

Ultra Flanger 382 KB
This sound, with maximum MANUAL and DEPTH settings, and new ULTRA mode, will give you a deep flange unlike any other pedal.
Rotary Flanger 509 KB
A great example of the BF2's rotating speaker sound. This effect uses the Gate/Pan mode and stereo ouptuts.
Gate Flanger 574 KB
You can get this sound in Gate/Pan mode. Connect only one of the stereo outputs and this cool gated flanger sound.