The Keeley octa osi transfigurating fuzz is a Keeley fuzz pedal, currently around $249. Close alternatives include the Keeley KE-Octap and the Keeley Octa Psi. It pairs well with the Laney DBC410 Digbeth 4x10 Cabinet and the Peavey MiniMAX.
Keeley octa osi transfigurating fuzz
Keeley · pedal
The Keeley Octa-Osi Transfigurating Fuzz is a complex octave fuzz pedal from Keeley Electronics delivering multi-octave fuzz saturation with harmonic layering and tonal transformation capability suited to experimental, progressive, and psychedelic guitar playing. The transfigurating fuzz concept involves dramatically transforming the guitar's natural tone through complex harmonic interaction and octave overtones.
What stands out
“Best on single-note lines where octave definition is clearest”
— from the reviews
“The Keeley Octa-Osi Transfigurating Fuzz is a complex octave fuzz pedal from Keeley Electronics delivering multi-octave fuzz saturation with harmonic layering and tonal transformation capability suited to experimental, progressive, and psyc…”
— from the listing
“Players who want psychedelic, experimental fuzz beyond standard one-octave designs find it a compelling choice”
— from the community notes
“A complex multi-octave fuzz from Keeley providing dramatic tonal transformation through harmonic layering and octave content”
— from the community notes
“keeley american construction is reliable”
— from the community notes
Trade-offs
“The transfigurating fuzz concept involves dramatically transforming the guitar's natural tone through complex harmonic interaction and octave overtones”
— from the listing
“s american production quality”
— from the reviews
- octave
- harmonic
- octave fuzz
- psychedelic
- experimental
- complex
- layering
- american
Price updated Oct 24, 2026
Genres the Keeley octa osi transfigurating fuzz is commonly used in
- Electronic
- Experimental
- Noise Rock
cited
Inferred from shared tonal signals, not a stated genre tag. - Psychedelic Rock
cited
Inferred from shared tonal signals, not a stated genre tag.
Amps that pair well with the Keeley octa osi transfigurating fuzz
Laney DBC410 Digbeth 4x10 Cabinet
Laney
23% matchpushes an already-dirty tonePushes an already-dirty tone harder and tightens it up. (saturated → tight)
Laney DBC410 Digbeth 4x10 Cabinet pushes a saturated tone toward tight
Comes later in the signal chain
Peavey MiniMAX
Peavey
23% matchpushes an already-dirty tonePushes an already-dirty tone harder and tightens it up. (saturated → tight)
Peavey MiniMAX pushes a saturated tone toward tight
Comes later in the signal chain
Gallien-Krueger MB108
Gallien Krueger
tonal matchComes later in the signal chain
Gallien-Krueger MB108 takes that saturated character and pushes it toward tight
Gallien-Krueger MB150S-112 Bass Combo
Gallien Krueger
tonal matchComes later in the signal chain
Gallien-Krueger MB150S-112 Bass Combo takes that saturated character and pushes it toward tight
Gallien-Krueger MB210MK2
Gallien Krueger
tonal matchComes later in the signal chain
Stack Gallien-Krueger MB210MK2 on top and a saturated tone tightens toward tight
Revv Dynamis D25 25W 1x12 Combo
Revv
tonal matchComes later in the signal chain
Feed a saturated signal into Revv Dynamis D25 25W 1x12 Combo and it comes out closer to tight
Revv Dynamis D20 MkII 20W Head
Revv
tonal matchComes later in the signal chain
Revv Dynamis D20 MkII 20W Head takes that saturated character and pushes it toward tight
EVH 410
Evh
tonal matchComes later in the signal chain
Stack EVH 410 on top and a saturated tone tightens toward tight
Pedals that stack with the Keeley octa osi transfigurating fuzz
Airis Effects 51-Filthy
Airis Effects
19% matchpushes an already-dirty tonePushes an already-dirty tone harder and tightens it up. (saturated → tight)
Stack Airis Effects 51-Filthy on top and a saturated tone tightens toward tight
Comes later in the signal chain
Shin's Music Dumbloid
Shins Music
16% matchpushes an already-dirty tonePushes an already-dirty tone harder and tightens it up. (saturated → tight)
Shin's Music Dumbloid takes that saturated character and pushes it toward tight
Comes earlier in the signal chain
DryBell Unit67 Compressor
Drybell
15% matchshapes the dynamic responseShapes how the tone responds to picking dynamics rather than its frequency or gain.
DryBell Unit67 Compressor leans toward compressed, and that's a real, usable character to pair with
Comes earlier in the signal chain
MXR M83
MXR
8% matchsits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.
Keep Keeley octa osi transfigurating fuzz's octave voice out front: MXR M83 goes after Keeley octa osi transfigurating fuzz in the signal chain so its modulated voice doesn't muddy it
Comes later in the signal chain
TC Electronic Triple Flashback Delay
TC Electronic
7% matchsits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.
Keep Keeley octa osi transfigurating fuzz's octave voice out front: TC Electronic Triple Flashback Delay goes after Keeley octa osi transfigurating fuzz in the signal chain so its tight voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)
Comes later in the signal chain
Cusack Music Reverb SME
Cusack Music
5% matchsits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.
Run Cusack Music Reverb SME after Keeley octa osi transfigurating fuzz in the signal chain, clear of Keeley octa osi transfigurating fuzz's own gain stage — goes in the amp's FX loop (or last, into a clean amp)
Comes later in the signal chain
EarthQuaker Devices Swiss Things
EarthQuaker Devices
EarthQuaker Devices Utility Series Buffer Preamp
EarthQuaker Devices
tonal matchComes later in the signal chain
Stack EarthQuaker Devices Utility Series Buffer Preamp on top and a saturated tone tightens toward clean boost
Cheaper alternatives
EarthQuaker Devices Fuzz Master General V2
EarthQuaker Devices
57% similarityShared character: one octave, lead
Catalinbread Octapussy
Catalinbread
56% similarityShared character: mono synth, one octave, lead
Dunlop MXR Octavio Fuzz JD-M267
Dunlop
56% similarityShared character: one octave, lead
EarthQuaker Devices Bit Commander
EarthQuaker Devices
49% similarityShared character: mono synth, one octave
Wampler Fuzztration octaver
Wampler
49% similarityShared character: one octave, lead
EarthQuaker Devices Eqd-Bit
EarthQuaker Devices
94% similaritysimilar tone character
Boutique & premium upgrades
Similar charactersee all similar tone character →
Keeley KE-Octap
Keeley
69% similarityShared character: mono synth, definition, one octave
Keeley Octa Psi
Keeley
69% similarityShared character: mono synth, definition, one octave
T-Rex Octavius
T Rex
55% similarityShared character: one octave, lead
Death By Audio Octave Clang
Death By Audio
54% similarityShared character: one octave, lead
Beetronics OC-BS
Beetronics
54% similarityShared character: one octave, lead
JAM Pedals Octaurus
Jam Pedals
53% similarityShared character: mono synth, one octave
See all alternatives to the Keeley octa osi transfigurating fuzz (cheaper + boutique) →
Questions people ask
What are good alternatives to the Keeley octa osi transfigurating fuzz?+
The closest matches in character are the Keeley KE-Octap, the Keeley Octa Psi, the T-Rex Octavius. Budget picks: EarthQuaker Devices Fuzz Master General V2, Catalinbread Octapussy, Dunlop MXR Octavio Fuzz JD-M267. Boutique upgrades: Fulltone OF-1 Octafuzz, Zvex Octane 3.
What pairs well with the Keeley octa osi transfigurating fuzz?+
Strong matches from rig and tone-complementarity evidence: Laney DBC410 Digbeth 4x10 Cabinet, Peavey MiniMAX, Gallien-Krueger MB108 — Laney DBC410 Digbeth 4x10 Cabinet pushes a saturated tone toward tight.
How much does the Keeley octa osi transfigurating fuzz cost?+
Around $249 (live listing price, updated Oct 24, 2026).
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