Boss BF-3 Flanger Pedal

Create thick flanger sounds with this modern take on a classic effect. Dial in tones ranging from slow jet plane swirls to faster, rotating speaker pulses.

Building on the 20-year legacy of the famous Boss BF-2, the BF-3 Flanger pedal gives guitarists and bassists an updated version of the classic Boss flanger with the thickest stereo flanging sounds ever. Two 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
- 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

- Pedal Switch, MANUAL Knob, RES (resonance) Knob, DEPTH Knob, RATE Knob, MODE Knob
- CHECK Indicator (Serves also as tempo and battery check indicator)
- GUITAR IN Jack, BASS IN Jack, OUTPUT A (MONO) Jack, OUTPUT B Jack, AC adaptor Jack (DC 9 V)
- Power Supply: DC 9 V: Dry battery (9 V type), AC Adaptor (PSA-series: optional)
- Current Draw: 40 mA (DC 9 V)
AC Adaptor: PSA-Series (Not included)

- Nominal Input Level: 20 dBu
- Input Impedance: 1 M ohms
- Nominal Output Level: 20 dBu
- Output Impedance: 1 k ohms
- Recommended Load Impedance: 10 k 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.)
Dimensions and Weight in Packaging
Base Item
Shipping Weight: 1.25 lbs
Shipping Dimensions: 6 x 4 x 3 in
Manufacturer Part Number (MPN): BF-3

For support or warranty questions, please contact the manufacturer:
Phone: 323-890-3700

Reviewers gave this product an overall rating of 4.5 out of 5 stars. (49 ratings)
Submitted March 10, 2009 by a customer from

"I'm Lovin It!"

Overall: 4.5 out of 5 stars
(see rating details)
Has way more capability than I have time to fiddle with. I use it mostly on very low depth and rate settings to give a chorus type fill in sound.
Lots of control available. Standard BOSS casing so it matches up great with the MT-2 in my pedal string.
Ease of Use
Takes some fiddling to get things set just right. What do you expect from a stompbox with this much crammed in though?
It's BOSS. What more do you need?
I rated it at a "5" simply because I bought it when I lived in Australia and I feel I paid too much for it.
Manufacturer Support
The Wow Factor
Very sexy purple color with a two tone LED in it that flashes?? That's frikkin HOT!

Musical Background:

Active Musician

Musical Style:

Rock/Christian Rock/Contemporary Worship
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