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Reverb
5.0 (2)
$63.26 11 available New
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4.8 (55)
$58.00 $57.00 $1.00 · All time low

Average Price: $67

Budget/Beginner

$149

$350+

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Price History

Based on price data from 2 merchants for "Doepfer A151 Sequential Switch V2". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

Unlock a world of dynamic creativity with the Doepfer A151 Sequential Switch V2, the ultimate tool for any modular synthesizer enthusiast. This ingenious module acts as a 4-position rotary switch, allowing you to route a single audio or CV signal between four independent outputs. Whether you're crafting ambient soundscapes or rhythmic sequences, the A151 provides the flexibility to seamlessly transition your signal with a trigger input, moving it to the next output in line. Need to loop back to the start? A simple reset input will do just that, giving you complete control over your signal flow.

Designed for Eurorack systems, the A151 is compact yet powerful. It processes a voltage range from -8V to +8V, ensuring compatibility with a wide array of modular setups. With its straightforward interface, you can easily select between 2, 3, or 4-step sequencing, making it a versatile addition to your modular rig. Whether you're a seasoned synthesist or just starting your journey into the modular world, the Doepfer A151 Sequential Switch V2 offers endless possibilities for sonic exploration.

Key Features:

  • 4-way sequential switch module for Eurorack modular synthesizers
  • Routes 1 signal (audio or CV) to 4 different outputs
  • Trigger input advances signal to the next output
  • Reset input returns signal to the first output
  • Select between 2, 3, or 4-step sequencing
  • Processes voltages from -8V to +8V
  • Euro rack format; 4HP width, 35mm depth
  • Power consumption: +20 mA (+12V)/ -10 mA (-12V)

Product specs

Type Quad Sequential Switch Eurorack Module
Other I/O Trigger in, Reset In, In/Out, 4 x Out
Depth 1.37" (35mm)
HP Size 4HP
Power Supply Requires Eurorack case and power supply

FAQs

What is the function of the Doepfer A-151 Sequential Switch V2 in a modular synth setup?

The Doepfer A-151 Sequential Switch V2 is used to route one input to up to four different outputs sequentially, allowing for complex signal routing and pattern creation within a Eurorack modular system.

How does the Doepfer A-151 Sequential Switch V2 handle signal routing?

It has one input and four outputs, switching between them based on trigger signals, effectively creating a step-sequencing effect for patch signals.

What are the power requirements for the Doepfer A-151 Sequential Switch V2?

The Doepfer A-151 requires a Eurorack case and power supply, drawing power from the case's bus board.

What is the HP size of the Doepfer A-151 Sequential Switch V2?

The Doepfer A-151 Sequential Switch V2 occupies 4HP in a Eurorack system, making it a compact module for signal switching tasks.

Can the Doepfer A-151 Sequential Switch V2 be used for both audio and CV signals?

Yes, the Doepfer A-151 is capable of switching both audio and control voltage (CV) signals, providing versatility in signal routing within a modular setup.

zero zero island

zero zero island

A simple patch with my new Doepfer A-151 Sequential Switch

Video thumbnail for A simple patch with my new Doepfer A-151 Sequential Switch by zero zero island

A simple patch with my new Doepfer A-151 Sequential Switch

zero zero island

zero zero island

Video thumbnail for More fun with the Doepfer A-151 Sequential Switch by musicalfungus

More fun with the Doepfer A-151 Sequential Switch

musicalfungus

musicalfungus

Reviews

PROS

  • Enables complex patching with up to 4-step CV sequences

  • Bi-directional routing for versatile signal management

  • Facilitates creation of intricate drum patterns

  • Supports clock division for dynamic rhythm control

  • Compact 4HP design packs a punch in small spaces

  • Clean audio signal processing at audio frequencies

  • LEDs provide clear visual feedback for operations

  • Affordable option for power, quality, and functionality

  • Enhances modular setups with extended step sequences

CONS

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Doepfer A151 Sequential Switch V2.

Features and functionality

  • The A-151 can be paired with Pressure Points and Brains to create sequences up to 24 steps, enhancing rhythmic possibilities.

    Source
  • The Doepfer A-151 is reversible, allowing both 4 inputs to 1 output and 1 input to 4 outputs, with options for switching between 2, 3, or 4 connections.

    Source

Use cases and applications

  • Owners highlight its ability to distribute an LFO rhythmically across the rack, providing instant creative gratification.

    Source
  • Using the A-151 in a 4:1 configuration allows for insertion of rhythmic space by leaving some inputs unpatched, creating dynamic pauses.

    Source
  • Combining two A-151 modules can create complex signal routing, such as a switch matrix for more dynamic compositions.

    Source
  • The module is effective for arpeggiating over chords with a setup involving a Keystep Pro and a clock, facilitating complex melodic patterns.

    Source
  • The Erica Synths V2 + CV Expander can become a complex tool when paired, offering greater functionality than simpler switches like the A-151, but requires significant HP space.

    Source

User experience

  • Some users observe voltage loss when using the A-151, which may affect quantization, potentially due to impedance issues.

    Source
  • Some users prefer the simplicity of the A-151 to avoid relearning complex modules after periods of inactivity, highlighting its ease of use.

    Source

Value and pricing

  • At $80, the A-151 is significantly more affordable than many alternatives, such as the $310 Vice Virga, making it a budget-friendly choice for basic switching needs.

    Source

Comparisons

  • Users find the Doepfer A-151 to be a straightforward option compared to the more complex Vice Virga, which offers features like grouped and randomized switching.

    Source

5.0 out of 5

Based on 1 Review and 1 Rating

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simfonik

Inexpensive way of opening up your system

This is a must have module for any modular setup. I picked mine up specifically for use with 2x Make Noise Pressure Points and a Brains, to enable up to 24 step sequences, but the things you can do with a switch are endless.

Artist usage

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See how Hainbach uses Doepfer A151 Sequential Switch V2

Hainbach

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Genre Usage

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