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Doepfer A-166 Dual Logic Module

$96.00 to $98.52 Price Tier: Budget

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Page last updated Jul 04, 2026

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$98.52 6 available New

$95.53 2 available Used

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4.8 (13)

$96.00

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Average Price: $97

Budget/Beginner

$149

$350+

Price Tier

In the Modular Synthesizers category, Doepfer A-166 Dual Logic Module is priced in the Budget/Beginner range. This is great gear to get started with or for creators on a budget.

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Description

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Dive deep into the world of modular synthesis with the Doepfer A-166 Dual Logic Module, a powerhouse of logical operations that adds a layer of complexity and creativity to your soundscapes. This module is an essential tool for those looking to explore the boundaries of modular synthesis, offering a trio of logic gates—AND, OR, and EXOR (exclusive OR)—that can be used to manipulate and transform your audio signals in innovative ways.

The Doepfer A-166 doesn't just perform; it communicates. With intuitive LED indicators for each mode, you’ll always have a clear visual understanding of your module’s current operations, making real-time adjustments a breeze. Its two inverters further expand your creative possibilities, allowing for even more complex modulations and sound manipulations.

Designed in the convenient Eurorack format, the A-166 fits seamlessly into your existing setup and demands minimal power, ensuring efficient operation without compromising on power or performance. Whether you're crafting intricate rhythms, evolving textures, or otherworldly soundscapes, this module provides the logical backbone to bring your sonic visions to life.

Key Features:

Equipped with 3 inputs for AND, OR, and EXOR (exclusive OR) operations
LED indicators for easy mode visualization
Includes two inverters for expanded creative possibilities
Eurorack format for seamless integration
Compact width of 8 HP and depth of 50 mm
Efficient power requirement: +40 mA (+12V) / -20 mA (-12V)

Product specs

Available since	November 2006
Width	8 TE / HP

FAQs

What type of logic functions does the Doepfer A-166 Dual Logic Module provide?: The Doepfer A-166 offers multiple logic functions including AND, OR, and XOR, allowing for complex signal processing and modulation possibilities within a modular synthesizer setup.
How many inputs and outputs does the Doepfer A-166 have?: The Doepfer A-166 features three inputs per logic function and two outputs, providing flexibility for routing and combining signals in a modular system.
Is the Doepfer A-166 compatible with Eurorack systems?: Yes, the Doepfer A-166 is designed for Eurorack modular synthesizer systems, fitting into a standard 8 HP width space.
Can the Doepfer A-166 handle both audio and control voltage signals?: The Doepfer A-166 is capable of processing both audio and control voltage signals, making it versatile for various modular synthesis applications.
What is the power consumption of the Doepfer A-166 Dual Logic Module?: The Doepfer A-166 consumes approximately 30 mA of power, which is typical for modules of its size and function in a Eurorack setup.

Videos

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Raul's World of Synths

Doepfer A166 Dual Logic Module-Combining Digital Signals Part One

Raul's World of Synths

Doepfer A-166 Dual Logic Basics

Raul's World of Synths

Doepfer A166 Dual Logic Module-Combining Digital Signals Part Two

Raul's World of Synths

Reviews

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PROS

Combines gates in versatile ways for creative rhythmic patterns
Includes two logic inverters for syncing and voltage source capabilities
Compact 8HP design, efficient use of rack space
Eight LEDs provide clear visual feedback
Highly durable with excellent build quality
Essential addition for any modular synth setup
Enables rhythmic stereo bouncing with gate control
Offers precise mixing of clocks and triggers for diverse rhythms

CONS

Does not generate any sound on its own

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Doepfer A-166 Dual Logic Module.

User experience

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Owners transitioning from semi-modular systems like Moog Grandmother find the A-166 instrumental in exploring deeper modular synthesis concepts.
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Some users find the complexity of using multiple logic modules overwhelming, leading them to periodically simplify their setups by trimming out modules.
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Comparisons

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A-166 users highlight the importance of having a flexible logic module, as seen with Behringer 173, which can function across audio rates and act as oscillators or envelopes.
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The Behringer 173 offers dual control gate inputs, expanding beyond simple AND gates, unlike the Doepfer A-150-8, which is noted for crosstalk issues.
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Unlike many setups that over-rely on oscillators, the A-166 complements systems heavy on random voltage generators and LFOs, offering balance and utility in modulation.
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Slowing down the tempo with the A-166 can evoke early 70s Kraftwerk vibes, perfect for those exploring retro electronic music styles.
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Features and functionality

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The A-166 can be used with a slew limiter to create envelope-like effects, adding versatility to its application in modular setups.
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The A-166's logic gates allow for creating algorithmic sequencing, enabling users to produce complex, stepped CV signals for unique modulation.
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The A-166's compact form factor and straightforward design make it a staple for those seeking to expand their modular setup without overwhelming complexity.
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The A-166, a dual logic gate module, excels in creating non-robotic, interesting counter-rhythms by processing gate and trigger inputs.
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The A-166's ability to handle Boolean logic operations makes it ideal for creating complex gates and triggers, enhancing creative patching possibilities in modular setups.
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Use cases and applications

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The A-166 is effective in setups with sequencers that have dedicated gate outputs per step, allowing for creative techniques like selective note transposition.
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Pairing A-166 with external effects like MOOD or Red Panda pedals via the A-138d Crossfader/FX Insert can introduce creative modulation possibilities, enhancing sound design options.
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The A-166 is particularly effective in a Buchla or Serge-inspired system, offering unique rhythmic and timbral possibilities not achievable with East Coast-style synths.
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The module is effective for generating unique rhythmic patterns, especially when integrated with setups including Behringer Model D and Korg ARP Odyssey.
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When paired with Mutable Instruments' Yarns and Plaits, the A-166 can retrigger in a musically engaging way, enhancing simple MIDI sequences.
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Mods and upgrades

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When integrating with a Doepfer-based system, consider adding a A-172 Maximum/Minimum Selector for enhanced logic processing and complex CV manipulation.
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