Doepfer - A-151 Quad Sequential Switch (Vintage Edition)

The Doepfer A-151 Vintage Edition is a compact 4-step sequential switch, offering flexible routing for CV or audio signals in a classic black panel design.

With each incoming trigger pulse, the A-151 steps through up to four stages, switching a single input to four outputs—or vice versa. Thanks to its bi-directional design, the input and outputs are completely interchangeable. You can use it to send one signal to four destinations, or scan between four inputs into one output.

A three-way front panel switch lets you limit the number of active steps to 2, 3, or 4, making it easy to create alternating signal paths or stepped modulation sequences. The reset input allows you to return the sequence to step one at any time—perfect for keeping things in sync.

This versatile switch is great for sequential modulation, routing events, or creating stepped audio variations—all with a vintage aesthetic.

• Sequential switch with 2-, 3-, or 4-step selection

• Bi-directional signal flow: inputs and outputs interchangeable

• Responds to trigger pulses

• Reset input for restarting the sequence

• Passive switching for CV or audio

• Vintage black panel