As of August 2026, Stacked Overdrive is retired.

Electro-Harmonix Polyphase · Stacked Overdrive

Stacked Overdrive

Stacked Overdrive

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Polyphase

[ owner photo · Electro-Harmonix Polyphase ]

A phase shifter.

[ owner photo · Electro-Harmonix Polyphase ]

A phase shifter.

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