St.Rock React ir II 2025

React:IR II is true reactive-resonance loadbox. The respective modes can be set using switches in the Loadbox section on the front panel of the device. In addition, the device has attenuator, which allows the usage of an amplifier at maximum volume, while listening at quiet “TV” loudness.

React:IR II has a number of stereo FX-effects:

• Noise Gate 
• IR section with single\duo\quad mode
• 5-Band Stereo Parametric EQ
• Compressor
• Modulations
• Delay
• Reverb

React:IR  loadbox has 100W rating at 8 Ohm. What does it mean? It’s mean that 100W of distorted (high gain) signal can be sent to loadbox, this equivalent to ~150W of sine signal.

One need to understand : when you set master volume of amplifier to 12 o’clock you get ~10% of power. Starting from 12-13 o’clock of master volume, phase inverter begin overloading and this sounds more fuzzy for high gain signals. This exactly why players, when using high gain, don’t like to overdrive power amp section instead using master knob up to 12-13 o’clock. Another case is crunch and clean tones ( both are crunch -) ): they use phase inverter overloading to get more tasty tone. 

There are many amps on a market with power more than 100W – Triple Rectifiers, 5150 family, Herbert and others… What will happen with React:IR when using it with these amps? Nothing! It will work properly, but device can be more warm. With master volume up to 12-13 o’clock – you can use any tube guitar amp up to 200W without any limits.

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