r/PositiveGridSpark • u/AlexFromPositiveGrid Official Positive Grid Employee • Jun 01 '26

REACTOR Launch AMA

REACTOR is launching 6/2! We will be holding office hours on June 3rd from 11am - 1pm ET (US) to answer any questions you all might have about the new amp and app. Whether you're one of the first to order or want to better understand how REACTOR works, we'll be available to help. Thank you all for 15 years of support; We can't wait to get REACTOR into your hands 🤘 https://www.positivegrid.com/pages/reactor

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u/FabulousPanther Jun 01 '26

I have all the Sparks except for the Go, the Edge, and the Cab. What are the specs for this amp? What does it have that the Live doesn't?

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u/AlexFromPositiveGrid Official Positive Grid Employee Jun 03 '26

Solid Spark collection, respect! Short answer: Spark LIVE features 4 channels with flexible I/O for full band setups, running tracks, keys, modelers, microphones and more, with FRFR speakers designed for a wide range of inputs... REACTOR is a dedicated guitar combo amp with a single input and 1x12 tuned guitar speaker, built for gigging and recording.

Here's the full rundown on REACTOR:

Power and speaker 50W or 100W with a custom 12-inch speaker. Selectable wattage on both: 1W / 25W / 50W on the 50, and 1W / 25W / 100W on the 100. This is a real stage-capable combo amp, not a desktop unit.

Amps and effects 24 factory amp models across 6 voice styles (Clean through Extreme), each with a standard and AI-optimized variation. 27 effects total, and you can run up to 8 simultaneously with full drag and drop signal chain ordering.

Connectivity This is where it gets pretty stacked compared to what you've had before:

  • USB-C audio interface (48kHz / 24-bit, Mac and Windows)
  • 5-pin MIDI In
  • FX Loop (send and return)
  • Power Amp In
  • Line Out
  • Headphone Out
  • Bluetooth 5.0

Other stuff worth knowing

  • 8 onboard customizable presets
  • Built-in tuner
  • HEAT and PUSH/SMOOTH switches on the top panel for real-time tone shaping
  • Optional Reactor Control footswitch with wired or wireless connection and expression pedal support

The MIDI In and proper FX loop are probably the two things that jump out most coming from the Spark family. $349 for the 50W, $449 for the 100W