The GFI System Jonassus Overdrive is a Gfi System overdrive pedal, currently around $249. Close alternatives include the Klon KTR and the Fulltone OCD V2. It pairs well with the Hiwatt DR103H and the Phil Jones Compact 2 (C2 Black).
GFI System Jonassus Overdrive
Gfi System · pedal
The GFI System Jonassus is a dual-channel overdrive: a Low channel giving a warm, articulate light gain and a High channel with thicker, medium-to-high gain. Each channel carries its own Volume and Gain with a shared Tone, and each has independent clipping modes — asymmetric diode for more compression and bite, symmetric diode for a smoother balance, and symmetric LED for a more open, louder-headroom feel.
- overdrive
- transparent
- drive
- boutique
- consistent
- blues
- diode
- amplifier character
Price updated Aug 27, 2026
Genres the GFI System Jonassus Overdrive is commonly used in
- Classic Rock
- Blues
- Rock
- Alternative
cited
Inferred from shared tonal signals, not a stated genre tag. - Country
cited
Inferred from shared tonal signals, not a stated genre tag. - Blues Rock
cited
Inferred from shared tonal signals, not a stated genre tag.
Amps that pair well with the GFI System Jonassus Overdrive
Hiwatt DR103H
Hiwatt
23% matchFeed a high gain signal into Hiwatt DR103H and it comes out closer to tight
Phil Jones Compact 2 (C2 Black)
Phil Jones
23% matchPhil Jones Compact 2 (C2 Black) pushes a high gain tone toward tight
Traynor BB115
Traynor
tonal matchStack Traynor BB115 on top and a high gain tone tightens toward tight
Gallien-Krueger Legacy 410
Gallien Krueger
tonal matchFeed a high gain signal into Gallien-Krueger Legacy 410 and it comes out closer to tight
Egnater Renegade 65 4x10 Combo
Egnater
tonal matchFeed a high gain signal into Egnater Renegade 65 4x10 Combo and it comes out closer to tight
Gallien-Krueger Legacy 210 Bass Combo
Gallien Krueger
tonal matchStack Gallien-Krueger Legacy 210 Bass Combo on top and a high gain tone tightens toward tight
Gallien-Krueger MB210-II
Gallien Krueger
tonal matchGallien-Krueger MB210-II pushes a high gain tone toward tight
Aguilar SL110 Fawn Limited
Aguilar
tonal matchStack Aguilar SL110 Fawn Limited on top and a high gain tone tightens toward tight
Pedals that stack with the GFI System Jonassus Overdrive
Shin's Music Dumbloid
Shins Music
18% matchShin's Music Dumbloid takes that high gain character and pushes it toward tight
Xotic EP Booster
Xotic
18% matchFeed a high gain signal into Xotic EP Booster and it comes out closer to clean boost
Electro-Harmonix Electric Mistress
Electro-Harmonix
16% matchPut Electro-Harmonix Electric Mistress after GFI System Jonassus Overdrive in the signal chain, clear of GFI System Jonassus Overdrive's own gain stage
Warm Audio Pedal 76 Compressor
Warm Audio
16% matchWarm Audio Pedal 76 Compressor's own tight character is the real reason this is worth trying
Cusack Music Delay TME
Cusack Music
15% matchPut Cusack Music Delay TME after GFI System Jonassus Overdrive in the signal chain, clear of GFI System Jonassus Overdrive's own gain stage — goes in the amp's FX loop (or last, into a clean amp)
TC Electronic Triple Flashback Delay
TC Electronic
14% matchKeep TC Electronic Triple Flashback Delay after GFI System Jonassus Overdrive in the signal chain, clear of GFI System Jonassus Overdrive's own gain stage — goes in the amp's FX loop (or last, into a clean amp)
Laney TI-Boost
Laney
tonal matchInto GFI System Jonassus Overdrive, Laney TI-Boost is right at home: it's built around a clean amp's front end
Mooer Flex Boost
Mooer
tonal matchMooer Flex Boost is voiced for a clean amp's front end — GFI System Jonassus Overdrive gives it exactly that
Cheaper alternatives
JAM Pedals TubeDreamer 58
Jam Pedals
73% similarityShared character: boost, compression, high_gain_settings
Tru-Fi The Newton
Tru Fi
72% similarityShared character: boost, compression, headroom
Tru-Fi Scream to Eternity
Tru Fi
72% similarityShared character: boost, compression, headroom
Dunlop MXR Timmy Overdrive, sold as Dunlop CSP027
Dunlop
72% similarityShared character: boost, high_gain_settings, transparent
J. Rockett Archer Ikon
J Rockett
71% similarityShared character: high_gain_settings, classic_rock, transparent
Friedman Golden Pearl Overdrive
Friedman
69% similarityShared character: guitar, transparent, blues_players
Boutique & premium upgrades
Similar charactersee all similar tone character →
Klon KTR
Klon
73% similarityShared character: boost, headroom, high_gain_settings
Fulltone OCD V2
Fulltone
72% similarityShared character: guitar, high_gain_settings, classic_rock
JHS Pedals Morning Glory V4
JHS Pedals
72% similarityShared character: boost, headroom, high_gain_settings
Paul Cochrane Timmy
Paul Cochrane
72% similarityShared character: boost, guitar, transparent
Fairfield Circuitry The Barbershop OD3
Fairfield Circuitry
71% similarityShared character: guitar, transparent, boost
Greer Southland
Greer
69% similarityShared character: boost, guitar, transparent
See all alternatives to the GFI System Jonassus Overdrive (cheaper + boutique) →
Questions people ask
What are good alternatives to the GFI System Jonassus Overdrive?+
The closest matches in character are the Klon KTR, the Fulltone OCD V2, the JHS Pedals Morning Glory V4. Budget picks: JAM Pedals TubeDreamer 58, Tru-Fi The Newton, Tru-Fi Scream to Eternity. Boutique upgrades: Klon Centaur.
What pairs well with the GFI System Jonassus Overdrive?+
Strong matches from rig and tone-complementarity evidence: Hiwatt DR103H, Phil Jones Compact 2 (C2 Black), Traynor BB115 — Feed a high gain signal into Hiwatt DR103H and it comes out closer to tight.
How much does the GFI System Jonassus Overdrive cost?+
Around $249 (live listing price, updated Aug 27, 2026).