Positive Grid Reactor 50 w/Control Bundle
Bundle offer comprising
Positive Grid Reactor 50
Combo for Electric Guitar
- With AI DSP and app
- Switchable power: 1 W / 25 W / 50 W
- Equipped with one custom 12" guitar speaker
- Sound engine: BIAS X Engine and component-based DSP modelling
- AI features: Tone generator via text, audio and images
- AI fine-tuning using natural language
- App: Reactor App with drag-and-drop signal chain editing and OTA updates
- Controls: Top panel with direct controls
- Dimensions (L x W x H): 460 x 240 x 418 mm
- Weight: 10.7 kg
Connectors:
- USB-C audio interface
- MIDI input
- FX loop
- Bluetooth
- Line output
- Headphone output
Positive Grid Reactor Control
Footswitch for Reactor Amps
- Switches: Six footswitches
- Expression connector
- Wireless: Bluetooth MIDI
- Wired: Exclusive wired Reactor connection for low latency
- Preset mode for switching between presets
- Effect toggle mode for switching effects on and off within a preset
- Dimensions (L x W x H): 162.80 x 93.91 x 53.41 mm
- Weight: 0.458 kg
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Available since June 2026
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Item number 646228
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Sales Unit 1 piece(s)
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Power (Manufacturers Specs) 50 W
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Bass Speaker in Inch 12"
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Number of Ways 1-Way
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Colour Black
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Weight 10,7 kg
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Battery No
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Trolley No
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Monitor Angle No
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Construction Type Standard
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Using for Guitar
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Analog Inputs 1
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Microphone Input 0
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Line Input Yes
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Media Player No
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Voice Assistant No
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Remote Control BT
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True Wireless Stereo No
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Wireless Mic Handhleld / Headset No
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Effect Yes
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Compatible with Reactor 50 & 100
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Type Amp Switcher
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Power rating in W 50 W
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Speaker 1x 12"
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LED Display Yes
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Memory slots 6
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PSU Connector Yes
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Connector TS
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Reverb Yes
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Number of HT-Speaker 0
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Number of Buttons / Switches 6
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Shape Floor Effects Pedal
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Function of Buttons / Switches Change-Over Switch
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MIDI Interface Yes
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Effects Processor Yes
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HT Speaker in Inch No
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Number Of Pedals 0
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External FX Loop Yes
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Number of Midrange Speaker 0
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Midrange Speaker in Inch No
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Bluetooth Yes
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Number of Bass Speaker 1
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Recording Output Yes
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Headphone Output Yes
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Width 460 mm
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Height 418 mm
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Footswitch connection Yes
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Depth 240 mm
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Line Out No
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Weight in kg 10,7 kg
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Batterie Information No
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Housing Material Plastic
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Stand Flange No
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Flyable No
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EQ per Channel Yes
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Low Cut No
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Ground Lift No
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A.I. – Amp Intelligence
With the Reactor 50, Positive Grid has created a fully-fledged guitar combo that is designed significantly more along the lines of classic stage and studio amplifiers than the company's Spark models. The Reactor 50 is not simply a practice amp; instead, it features a sturdy wooden cabinet, a specially matched 12" speaker, and a traditional control panel with gain, three-band EQ, effects, and volume controls. Beneath this classic exterior, however, lies a modern modelling system powered by their new “Amp Intelligence” technology: Guitar sounds can be created not only via conventional presets, but also generated from text prompts, images, or audio clips. Despite its extensive feature set, operation remains pleasingly direct and closely follows the feel of a traditional guitar amplifier. The bundle also includes the matching Reactor Control footswitch, which provides direct physical access to key functions and makes the Reactor 50 even more flexible on stage and in rehearsals.
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Real controls, no menu-diving
Despite being packed with modern modelling technology, the Positive Grid Reactor 50 remains straightforward to operate. On the amp itself, Positive Grid has opted for a classic top panel with familiar controls for gain, EQ, effects, and volume. The dedicated Amp control on the left allows direct switching between amplifier types, with the adjacent Push/Smooth and Heat switches further tweaking the sound. Presets, banks, and the tuner are also accessed via physical controls. In a live context in particular, though, the footpedal adds really intuitive hands-free operation – this is where the bundle with the Reactor Control comes into its own. The compact floor unit is designed so that many essential functions of the Reactor amp are available immediately, without the need for complex programming or menu navigation.
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Freedom in a footswitch
The Reactor Control pedal operates the amp via six robust footswitches, whose functions depend on the selected operating mode. In Preset mode, players can quickly recall individual sounds and entire banks of presets as well as activate the effects loop, while Effect Toggle mode replicates the functions of a conventional pedalboard, allowing individual effects to be switched on and off within specific presets. An expression pedal can additionally be connected for use as a volume or wah pedal, or to control a range of other parameters in real time. In addition, sounds and signal chains can be edited conveniently using the accompanying Reactor app, which is also where users will find the unique “Amp Intelligence” feature, to turn ideas into sound using text, image, or audio prompts.
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About Positive Grid
Positive Grid was founded in the Californian city of San Diego in 2013, and from the very beginning the company’s mission statement was to bridge the gap between mobile technologies such as smartphones, as well as the potential offered by the digital world, and the analogue feel of guitar and bass equipment. The company’s pursuit of this goal has produced a range of exciting products, the most significant of which is undoubtedly the award-winning BIAS FX 2 amp and effects modelling software platform. With its "Spark Amp" series, Positive Grid has combined the limitless possibilities that the digital world provides with conventional guitar and bass amplifiers. Positive Grid’s spirit of innovation and the speed with which new developments are produced is a clear indication of what this still relatively young company has in store for the future.
Powered by creativity
The Positive Grid Reactor 50 Control Bundle is most at home wherever guitarists need to switch between completely different sounds, and its switchable output power means that the amp can adapt to everything from low-volume home practice to louder environments like rehearsals and gigs. At the same time, the combination of classic amp controls and direct footswitch operation ensures seamless sound changes while playing – either wirelessly via Bluetooth or via the instrument cable the pedal comes with The USB-C interface allows ideas to be recorded or backing tracks to be played in, and players using external effects units or modelling boards benefit from the amp's effects loop and power amp input. The Reactor 50 will thus particularly appeal to guitarists who have to accommodate a myriad of different styles, such as those who play in cover/top 40 bands.
In the spotlight
Amp Intelligence
One of the most intriguing aspects of Positive Grid's Reactor amplifiers is the company's new Amp Intelligence technology. Instead of configuring sounds in the conventional way from amplifier types, speaker cabinets, and effects, tonal ideas can simply be described here, with terms like "warm vintage crunch" or "modern British high-gain sound" already sufficient for the system to generate a suitable tone. In addition, the amplifier can even process images or short audio clips as a basis for creating new sounds if desired. The Reactor app also allows users to create and further refine their own virtual amplifier models. Notably, the system even adapts over time to the user's personal tonal preferences and preferred sound characteristics.
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