Positive Grid announces the REACTOR Intelligent Guitar Amplifier, a 1x12” electric guitar combo amplifier (50W and 100W models) with a new approach to amplification that builds tone from the ground up.
REACTOR is powered by Amp Intelligence™— a new type of sound engine that builds guitar tone on demand. It enables players to go from idea to a finished, playable sound in seconds. Instead of searching through tone presets or manually dialing in sounds, players can describe a tone, upload a recording, or share an image. REACTOR responds by building a complete signal chain or even a custom amp in real time, delivering a full, rich sound that feels dynamic at any volume.
REACTOR also provides flexible tools for shaping tone. The amp’s top panel features a full array of controls for fast adjustments, while its exclusive mod switches and a dedicated app provide deeper tone design options.
As a performance amp, REACTOR combines a powerful, high-volume 1x12” platform with selectable wattage and professional connectivity, enabling it to move easily from rehearsals and live performance to home practice and recording.
The optional REACTOR Control footswitch enables hands-free performance control.
Amp Intelligence™
At the core of REACTOR is Amp Intelligence, a tone engine built to understand how great amplifiers actually work.
REACTOR’s Amp Intelligence tone engine decoded over 200 amp designs at the circuit level — gain stages, transformers, bias points, harmonic response — capturing the behavioral DNA of the most legendary amps ever built. So every tone it builds is grounded in how great amp designs actually work. The result is tone that's dynamic, alive, and responsive to every note played. Any tone imaginable can be delivered on demand, from the familiar to never-before-heard.
Tone Creation On Demand
With most amps, players are limited to fixed presets or manually adjusting settings to get close to their desired sound. REACTOR changes the rules. Guitarists describe the tone they want and REACTOR delivers a full, rich, playable tone. The Creator Hub in REACTOR’s dedicated app lets guitarists build tones – whether a familiar favorite or something completely new – in one of three ways:
- Text → Tone: Describe an artist, sound or idea; literal or abstract.
- Image → Tone: Snap or upload a photo of gear, an object, a selfie or anything that inspires sound.
- Audio → Tone: Upload an audio file or screen recording of anything.
Stage Tone. Any Volume.
Most amplifiers lose depth and character when played at lower volumes. REACTOR is designed to sound like itself wherever it’s used. Selectable wattage (1W, 25W or full power) maintains full, present tone at any level, whether at home, in the studio, or on stage. A custom 12” speaker in a wood cabinet delivers the warmth and projection expected from a performance amp, even at lower volumes.
Classic Control. Modern Amp Mods.
A tactile top panel offers the immediacy of classic knobs for quick adjustments (gain, EQ, reverb, volume); an amp knob to audition a variety of amps in any signal chain; an effects section; and eight user-saveable, onboard preset slots.Two exclusive mod switches powered by Amp Intelligence extend tonal control further:
- HEAT – adjust feel and harmonics without significantly changing volume.
- PUSH / SMOOTH – move between cutting lead presence for soloing and a warmer, rounder response for playing rhythm guitar.
Complete Rig Integration
REACTOR is built to integrate into any setup with comprehensive I/O:
- USB-C direct recording
- Line out with cabinet simulation
- FX loop
- Power amp input
- Bluetooth® audio and app control
- MIDI input
- Headphone output
It Remembers
REACTOR includes Tone Memory that remembers how players build and refine tone. Over time, each session starts closer to the intended tone and REACTOR evolves into an amp that reflects the player’s sound and feels distinctly their own.
Pricing and Availability
REACTOR and the REACTOR Control footswitch are currently available online and at authorized dealers, with pricing as follows:
REACTOR 50W – USD $349
REACTOR 100W – USD $449
REACTOR Control – USD $149
Visit positivegrid.com/pages/reactor for the complete REACTOR story.
Visit positivegrid.com/pages/reactor-control for the REACTOR CONTROL footswitch.
To find local REACTOR retailers, visit positivegrid.com/pages/online-retailers.
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