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Positive Grid Reactor

Positive Grid Reactor

Your imagination deserves an amplifier! The Positive Grid Reactor family of amplifiers starts with what matters most: how it sounds and feels when you play. Big, full, and responsive, its 1 x 12-inch design delivers rich tone that reacts to your touch with notes that bloom and dynamics you can feel. But Reactor doesn’t stop at great amp tone. Powered by Positive Grid’s proprietary Amp Intelligence tone engine, it turns text, audio, or even an image into a tone you can make your own — letting you imagine a sound and play it in seconds.

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Turn It Up. Or Don’t.

Available in 50- and 100-watt models, Reactor delivers big, full amp tone through a custom-voiced 12-inch speaker with the punch, presence, and response you want from your go-to guitar amp. Selectable 1-watt, 25-watt, and full-power settings let you get that satisfying experience at home, in rehearsal, or onstage. And with comprehensive I/O, Reactor integrates easily into the rest of your rig.

Turn It Up. Or Don’t.
Tone That Feels Alive

Tone That Feels Alive

At the heart of Reactor is Amp Intelligence, a new AI-powered tone engine that understands how great amplifiers behave — not just how they sound. It uses that knowledge to create tones on demand with the dynamics, responsiveness, and character you expect from a great amp. Dig in, and it pushes back. Ease up, and it follows your touch. Whatever tone you create, it responds as an amp should.

Hands-on Tone Control

Reactor puts essential tone controls right where you want them. Dial in gain, EQ, and volume; choose amps and effects; or recall any of eight onboard presets directly from the top panel. Exclusive Heat and Push/Smooth switches let you quickly change the character and response of your sound. When you want to go deeper, the Reactor app unlocks even more ways to create, shape, and refine your tone.

Hands-on Tone Control
Build Any Tone on Demand

Build Any Tone on Demand

Ask for “an early ’70s progressive rock soaring lead,” and Reactor builds it. Hear a guitar sound you love on a track? Upload it. See a rig that catches your eye? Snap a photo. Reactor uses Amp Intelligence to turn text, audio, and images into playable tones in seconds. You can even create entirely new custom amps then save them to your library to play anytime or share with other players.

Go Deeper

Once you’ve found your sound, make it your own. Tweak it directly from Reactor’s hands-on controls or open the Reactor app to go deeper with an intuitive visual signal chain. Drag and drop effects, fine-tune your amp, or refine your tone with simple prompts. Tone Memory remembers the sounds you create and the choices you make, helping Reactor get closer to what you’re looking for over time.

Go Deeper
Built for the Whole Rig

Built for the Whole Rig

Reactor is ready for wherever you play. Record directly over USB-C, connect your pedalboard through the effects loop, run straight to a PA or recording setup with the dedicated line out, or integrate MIDI into a more advanced rig. Add the optional Reactor Control for hands-free access to presets, effects, and more with wired or wireless operation.

Take Control

Add the optional Reactor Control for hands-free control when you play. Six sturdy steel footswitches let you switch presets, toggle individual effects, and engage the effects loop while expression-pedal support adds control over volume, wah, and more. Go wireless with 40+ hours of battery life or connect by cable for ultra-low-latency performance.

Take Control