The Positive Grid REACTOR 100 Combo is a new kind of guitar amp built around creation. Featuring Amp Intelligence powered tone, intuitive controls, REACTOR App, & comprehensive connectivity
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Most guitar amps haven't evolved much. Plug in, twist some knobs, cross your fingers, and somehow still spend three hours at soundcheck. The Positive Grid Reactor 100 is a different beast.
This 100-watt combo amp is powered by Amp Intelligence — meaning it can take a text description, a photo, or an audio clip and transform it into a fully playable tone in real time. It decoded over 200 amp designs at the circuit level to understand how great amps actually behave, not just how they measure. The result? An amp that sounds like itself at any volume, gets smarter the more you use it, and lets you build tones that have never existed in the physical world.
Tone Generation That Actually Gets You
Most amp features exist to sell units. Amp Intelligence exists to assist the part of your brain that knows exactly what tone you want but has no idea how to get there. Type a description, drop in an audio clip, or snap a photo of a rig you like — REACTOR builds the tone and makes it playable in seconds. It's like having a very talented amp tech on call 24/7, except this one never asks for coffee.
Text, Audio, and Image to Tone: Describe "tight, mid-gain British crunch," upload a track you love, or photograph an amp you've been eyeing. Amp Intelligence analyzes your input and generates a matching, playable tone on the spot — no guesswork, no menu diving.
Build Your Own Amps: Go past matching existing gear. Combine characteristics, shape deep parameters like gain structure, bias, and voicing, and create original amp voices that have never existed in the physical world. Name them. Save them. Share them on ToneCloud.
Tone Memory: REACTOR remembers your prompts, adjustments, and preferences over time. Every session, it starts a little closer to exactly where you want to be — like a bandmate who actually listens.
Controls That Know Their Place
Nothing kills creative flow faster than digging through sub-menus to find the reverb knob. REACTOR's top panel is built around the idea that your hands should stay on your guitar, not your amp. Classic controls sit right where you'd expect them, and two switches you won't find anywhere else give you instant tonal moves that would normally require tap-dancing on a pedalboard.
Tactile Top Panel: Gain, EQ, reverb, effects, master volume, and preset recall are all accessible via dedicated knobs and buttons. No menus. No learning curve. Adjust mid-song and stay in the moment.
Push/Smooth & Heat +/- Switches: Push/Smooth takes you from laid-back rhythm to cutting lead without touching your distortion. Heat +/- adjusts feel and harmonic character without significantly altering volume. Two switches. Infinite personality.
REACTOR App + Optional Footswitch: For deeper sessions, the REACTOR app offers drag-and-drop signal chain editing and full parameter access across 24 amp models and 27 effects. Add the REACTOR Control footswitch for wireless or wired stage control with six switches and expression support.
Stadium Tone at Bedroom Volumes (and Vice Versa)
Most amps thin out the moment you turn them down past "neighbors-are-definitely-awake." REACTOR doesn't. Selectable wattage keeps the tone full and present whether you're practicing at 1 a.m. or playing to the back of a venue. The custom 12" speaker and wooden cabinet aren't afterthoughts — they're the physical foundation that makes all that Amp Intelligence actually sound like a guitar amp.
Selectable Wattage (1W / 25W / 100W): Dial in the right power level for the room. Full-bodied amp tone at bedroom volume is no longer a contradiction in terms.
Custom 1x12" Guitar Speaker: Balanced lows, rich mids, and articulate highs in a wood cabinet that delivers warmth and presence at any output level. It sounds like itself wherever you play it.
Comprehensive Connectivity: USB-C audio interface, MIDI In, FX Loop, Power Amp In, Bluetooth, Line Out, and Headphone Out cover every scenario from silent practice to full studio integration — without needing a separate interface, a MIDI controller, or a prayer.
The Amp You Won't Outgrow
The Positive Grid Reactor 100 is built around creation, not presets. It starts with 24 amp models and 27 effects with eight simultaneous effect slots, and it only gets more capable the more you use it. Amp Intelligence has decoded the behavioral DNA of over 200 legendary amp designs at the circuit level — gain stages, transformers, bias points, harmonic response — so every tone it builds is grounded in how great amps actually work.
This is the amp for players who've always had a clear sound in their head and spent years chasing it through gear. Your search ends here.
Positive Grid Reactor 100 Features:
Amp Intelligence-powered tone engine with real-time generation via text, audio, images, and conversational tweaks
24 amp models included; build and save unlimited custom amp designs
27 effects with 8 simultaneous effect slots across Gate, Compressor, Drive, Modulation, Delay, Reverb, Wah, and EQ
Selectable wattage: 1W / 25W / 100W for stage, studio, or bedroom use
Custom 1x12" guitar speaker in a wood cabinet for balanced, full-bodied tone at any volume
Tactile top panel with classic gain, EQ, reverb, effects, and master volume controls — no menus required
Push/Smooth and Heat +/- switches for instant tonal moves without pedals
REACTOR App with drag-and-drop signal chain editing and OTA updates
Tone Memory learns your preferences and refines suggestions over time
ToneCloud integration for browsing, downloading, and sharing custom tones and amp builds
Unlimited preset storage in-app; 8 onboard preset slots for instant recall from the amp panel
USB-C audio interface, MIDI In, FX Loop, Power Amp In, Bluetooth, Line Out, and Headphone Out
Compatible with REACTOR Control footswitch (sold separately) for wired or wireless stage performance
very cool on all the features this amp has. so much you can do with this amp with the built in AI Very Awesome!
Published date
06/18/26
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Frequently Asked Questions
It's a 100-watt smart guitar combo amp that uses "Amp Intelligence" to build custom tones from scratch. You can feed it text prompts, audio clips, or even images, and it will conjure up the exact sound you're looking for.
Over 200 legendary amp designs have been run through a digital MRI — analyzing their circuits, transformers, and harmonic behavior. Amp Intelligence uses this data to build highly responsive, dynamic tones on demand. It's real amp physics, just with a much higher IQ.
Absolutely. With selectable wattage (1W, 25W, or 100W), you get the same rich, full-bodied tone whether you're on stage or trying not to wake the neighbors at 2 AM. No more thin, lifeless bedroom tone.
You bet. With its built-in USB-C connectivity, you can plug it straight into your computer to record. Combined with Bluetooth, MIDI, an FX Loop, and headphone outs, it's the ultimate centerpiece for your home studio.
They share the exact same smart brain and tone-crafting features — the only difference is muscle. The Reactor 100 packs 100 watts of stage-shaking power, while the Reactor 50 gives you a leaner 50 watts, which is ideal for smaller gigs and studio spaces.
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