The Metropoulos Amplification Supa Boost three-band EQ and boost running at a high internal voltage by a company known for their high-gain amps refining the Plexi tone. The pedal's FET transistors add an additional gain stage to your chain. https://www.youtube.com/watch?v=jxNQJB6tO0U The first Metropoulos pedal!  George took the boost circuit from…Click on the title for more