This is a preamp pedal that clones the preamp of a GK 800 RB almost perfectly. I have a 82 horizontal switch 800RB and minus any cabinet or speaker sim differences this behaves almost identically. This is better than either of the master effects versions, having owned both, and looks cooler too. Make sure you crank the volume knob for the most saturation. Almost brand new with box, all I did was carefully add the velcro. Original rubber feet are on the side if you want to put them back on.
Thanks
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