Doepfer - A-151 Quad Sequential Switch (Silver)

The Doepfer A-151 is a 4-step sequential switch for CV or audio signals, designed to bring flexibility and structure to your patching workflow.

With every incoming trigger pulse, the A-151 advances to the next stage, routing a single signal through up to four outputs—or cycling four different signals into one common output. All jacks are bi-directional, allowing you to use the module however it suits your system.

A 3-position switch lets you limit the sequence length to 2, 3, or 4 steps, ideal for rhythmic switching or cycling modulation sources. A dedicated reset input brings the sequence back to step one, ensuring tight sync with your clock or trigger source.

Whether you're routing modulation, alternating gates, or scanning audio inputs, the A-151 provides simple yet powerful switching in just 4HP.

• 2-, 3-, or 4-step sequential switching

• Works with CV or audio

• Fully bi-directional signal routing

• Trigger-controlled stepping

• Reset input for synced sequences

• Compact 4HP format with silver aluminum faceplate