Korena
Product detailSKU #1274034492357

BOSSBF-3 Flanger Effects Pedal

BOSS logo
dynamicfunk
BOSS BF-3 Flanger Effects Pedal

Independent shopping perspective

The Korena take

A flanger with a dedicated bass input and stereo outputs. For guitarists or bassists who want jet-sweep modulation and can run two amps.

BOSS BF-3 Flanger Effects Pedal product detail
Product studyBOSS BF-3 Flanger Effects Pedal

Strong match

Who this is for

  • Bassists who need modulation that does not thin out the low end
  • Stereo rigs where the effect can spread across two amps
  • Funk and clean rhythm parts where the sweep tracks your picking

Consider the trade-offs

When to look elsewhere

  • Players committed to an all-true-bypass signal path
  • Anyone running a battery-only board for long sets
  • Rigs with no room for a two-amp stereo setup

What matters in use

The specifications, translated

Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.

Detail 01

Buffered bypass

Signal stays driven when the effect is off, so long cable runs keep their top end. Not true bypass.

Detail 02

Separate guitar and bass inputs

The bass input is voiced to keep low frequencies intact instead of letting the sweep hollow them out.

Detail 03

Output A and output B jacks

Run stereo into two amps for a wide sweep, or use A alone for a normal mono board.

Detail 04

1 Mohm input impedance

High enough that passive pickups are not loaded down. Safe to place first in the chain.

Detail 05

About 4 hours on an alkaline 9V

Roughly two gigs before the battery fades. An adapter is the practical choice for regular playing.

Detail 06

425 g, 5-1/8 x 2-7/8 in

Standard compact footprint with enough weight to stay planted on a board.

Final check

Know before you order

  1. 01PSA-series adapter is sold separately; no power supply in the box
  2. 02Stereo needs a second amp and a second output cable
  3. 03Battery life is about four hours, so carry a spare 9V

Product questions

Before you decide

Straight answers to the questions shoppers most often ask about this product.

01Does it work with bass?

Yes. There is a dedicated bass input separate from the guitar input, so the low end stays intact through the effect.

02Is it true bypass?

No, it uses buffered bypass. That helps drive long cable runs but will not suit a board built around passive bypass.

03Do I need two amps to use it?

No. Output A works on its own as a normal mono output. Output B is there when you want stereo.

04Does it include a power supply?

No. The PSA-series adapter is sold separately. A 9V alkaline battery runs it for roughly four hours.

Reference

Full specifications

The complete catalog record, organized around the decisions musicians make when comparing gear.

1 detailsSound
Recommended Load Impedance
10 kohms or greater
8 detailsConnections & power
Input Impedance
1 Mohm
Output Impedance
1 kohm
Nominal Input Level
-20dBu
Output A Mono Jack
1/4 inch phone type
Guitar in Jack
1/4 inch phone type
Output B Jack
1/4 inch phone type
Nominal Output Level
-20 dBu
Bass in Jack
1/4 inch phone type
4 detailsSize & weight
Weight Including Battery
425 g, 15 oz.
Depth
129 mm, 5-1/8 inch
Width
73 mm, 2-7/8 inch
Height
59 mm, 2-3/8 inch
4 detailsOther
Indicator
CHECK indicator (Used for indication of check battery)
Alkaline
Approx. 4 hours
Bypass
Buffered bypass
AC Adapter Psa Series
sold separately)

Complete your setup

Worth comparing

More from BOSS