The Positive Grid Reactor 100 is a Positive Grid amplifier, currently around $449. Close alternatives include the Crate VFX 5212 and the Marshall Zakk Wylde MG15MSZW MicroStack. It pairs well with the Greer Black Mountain and the ThorpyFX The Dane.
Positive Grid Reactor 100
Positive Grid · amplifier
Positive Grid built its reputation primarily on digital modeling technology, most visibly through the Spark line of smart practice amps that use software-driven amp and effects modeling rather than traditional analog tube or solid-state circuitry, and the Reactor 100 sits within that broader digital amplification approach. The 100 designation suggests a higher-output model within the lineup, aimed at players who want Positive Grid's modeling and connectivity features at a volume level suitable for small gigs or rehearsal rather than bedroom practice alone. Specific amp modeling library size, control layout, and connectivity features for this exact model aren't confirmed from available sources.
- digital
- practice
- rehearsal
- response
- analog
- mid
- bedroom
- driven
Good for
- Live
- Silent Stage
- Studio
Price updated Aug 26, 2026
Pedals that stack with the Positive Grid Reactor 100
Greer Black Mountain
Greer
21% matchGreer Black Mountain stacks fuzzy on top of the mid-forward already here
ThorpyFX The Dane
ThorpyFX
20% matchThorpyFX The Dane layers fuzzy onto an already mid-forward signal
Wren and Cuff Box of War OG
Wren And Cuff
20% matchRun mid-forward into Wren and Cuff Box of War OG for more fuzzy on top
Fuzzrocious Cosmic Bull Shark
Fuzzrocious
12% matchKeep Positive Grid Reactor 100's pristine voice out front: Fuzzrocious Cosmic Bull Shark goes after Positive Grid Reactor 100 in the signal chain so its fuzzy voice doesn't muddy it
Artec SE-NGT
Artec
8% matchKeep the SE-NGT ahead of the Reactor 100 — it silences noise before the amp's own digital-analog hybrid response kicks in.
Boss DD-2 Digital Delay
Boss
6% matchPut Boss DD-2 Digital Delay in Positive Grid Reactor 100's effects loop, clear of Positive Grid Reactor 100's own gain stage — goes in the amp's FX loop (or last, into a clean amp)
EarthQuaker Devices Afterneath V2
EarthQuaker Devices
6% matchKeep EarthQuaker Devices Afterneath V2 in Positive Grid Reactor 100's effects loop, clear of Positive Grid Reactor 100's own gain stage — goes in the amp's FX loop (or last, into a clean amp)
Cusack Music Carolina Reaper Overdrive Fuzz
Cusack Music
tonal matchCusack Music Carolina Reaper Overdrive Fuzz layers high gain onto an already mid-forward signal
Cheaper alternatives
Positive Grid Spark EDGE 4-Channel 65W Modeling Combo
Positive Grid
95% similaritysimilar tone character
Fender Mustang LXT50 Combo Amp
Fender
94% similaritysimilar tone character
Laney LX35R
Laney
93% similaritysimilar tone character
Kustom 2.0 100 Watt 1X12"
Kustom
93% similaritysimilar tone character
Blackstar Idcore 40 V3
Blackstar
92% similaritysimilar tone character
Peavey JSX Mini Colossal Guitar Amp
Peavey
92% similaritysimilar tone character
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See all alternatives to the Positive Grid Reactor 100 (cheaper + boutique) →
Questions people ask
What are good alternatives to the Positive Grid Reactor 100?+
The closest matches in character are the Crate VFX 5212, the Marshall Zakk Wylde MG15MSZW MicroStack, the Fender Mustang LT40S. Budget picks: Positive Grid Spark EDGE 4-Channel 65W Modeling Combo, Fender Mustang LXT50 Combo Amp, Laney LX35R.
What pairs well with the Positive Grid Reactor 100?+
Strong matches from rig and tone-complementarity evidence: Greer Black Mountain, ThorpyFX The Dane, Wren and Cuff Box of War OG — Greer Black Mountain stacks fuzzy on top of the mid-forward already here.
How much does the Positive Grid Reactor 100 cost?+
Around $449 (live listing price, updated Aug 26, 2026).
Compare
- vs Crate VFX 5212
- vs Positive Grid Spark EDGE 4-Channel 65W Modeling Combo
- vs Fender Mustang LXT50 Combo Amp