As of August 2026, Stacked Overdrive is retired.

Gurus Amp Optivalve MkII · Stacked Overdrive

Stacked Overdrive

Stacked Overdrive

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Gurus Amp→Optivalve MkII

Optivalve MkII

[ owner photo · Gurus Amp Optivalve MkII ]

Tube optical compressor pedal modeled on the Teletronix LA-2A design, with Tone, Ratio, Output and Input dials setting the compression curve.

[ owner photo · Gurus Amp Optivalve MkII ]

Tube optical compressor pedal modeled on the Teletronix LA-2A design, with Tone, Ratio, Output and Input dials setting the compression curve.

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