Pricing and availability

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Average Price: $168

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$149

$350+

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Based on price data from 2 merchants for "4ms QCD Expander". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

Unlock the full potential of your modular synth setup with the 4ms QCD Expander. Designed to enhance the capabilities of the 4ms Quad Clock Distributor (QCD), this expander transforms your QCD into a dynamic and programmable nonlinear sequencer. Each channel is supercharged with a CV Trigger Delay (Pulse Width) jack and knob, offering three selectable output modes: delayed trigger, inverted gate, and shuffle. This means you can dive into crafting intricate rhythms and evolving patterns with ease.

The QCD Expander includes attenuverters for all CV inputs, allowing for precise modulation and tailor-made rhythmic creations. Its intuitive design ensures you're not just limited to standard rhythms – you can explore the depths of your creativity with self-patched swing and shuffle patterns. With a compact 12HP footprint, it fits seamlessly into any Eurorack setup, delivering powerful functionality without demanding space.

Connect the QCD Expander effortlessly to your QCD using the provided ribbon cables, and enjoy the control over global LED brightness from the front panel for an intuitive user experience. Whether you're a seasoned modular enthusiast or a newcomer to the world of Eurorack, the 4ms QCD Expander invites you to redefine the boundaries of your musical possibilities.

Key Features:

  • 12HP Eurorack format module
  • Expansion module for 4ms QCD, enabling complex rhythmic modulation
  • Adds CV Trigger Delay, additional output jack with three modes, and attenuverters for each channel
  • Connects with included 16-conductor ribbon cable
  • Adjustable global LED brightness
  • Power consumption: +12V: 44mA, -12V: 30mA
  • Module depth: 25mm (0.98")

Owner's manual

4ms QCD Expander User Manual

Product specs

Type Eurorack Clock Expansion Module for 4ms QCD
Other I/O 4 x CV in, 4 x INV out
Depth 0.98" (25mm)
HP Size 12HP
Power Supply Requires Eurorack case and power supply

FAQs

What is the primary function of the 4ms QCD Expander?

The 4ms QCD Expander is designed to expand the functionality of the 4ms Quad Clock Distributor (QCD) by adding CV control over the QCD's features, allowing for more complex and dynamic clock modulation in your Eurorack setup.

How does the 4ms QCD Expander connect to the Quad Clock Distributor?

The 4ms QCD Expander connects directly to the Quad Clock Distributor via a ribbon cable, providing additional CV inputs and inverted outputs to enhance the QCD's capabilities.

What are the CV input and inverted output options on the 4ms QCD Expander?

The 4ms QCD Expander features 4 CV inputs for modulating the QCD parameters and 4 inverted outputs for generating inverted clock signals, offering increased flexibility and control in modular synthesizer setups.

Is the 4ms QCD Expander compatible with other Eurorack modules?

While the 4ms QCD Expander is specifically designed to work with the 4ms Quad Clock Distributor, it can integrate with other Eurorack modules to enhance clock modulation and synchronization within a modular system.

Synth Diy Guy

Synth Diy Guy

Generative patching with the 4MS QCD, QCD Expander and QPLFO.

Video thumbnail for Generative patching with the 4MS QCD, QCD Expander and QPLFO. by Synth Diy Guy

Generative patching with the 4MS QCD, QCD Expander and QPLFO.

Synth Diy Guy

Synth Diy Guy

Video thumbnail for Building the 4MS QCD Expander by Synth Diy Guy

Building the 4MS QCD Expander

Synth Diy Guy

Synth Diy Guy

Reviews

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about 4ms QCD Expander.

Features and functionality

  • The QCD Expander offers a hands-on approach with visible clock configuration, preferred by users who avoid complex menu systems.

    Source
  • Users appreciate the ability to tap in individual divisions/multiplications with the QCD, contrasting with Tempi's button combinations.

    Source
  • QCD Expander excels in modulating clock speed for sequencers like Rene, which advance on clock ticks rather than BPM, offering unique rhythmic flexibility.

    Source
  • The QCD Expander supports 1/22 to 16 division/multiplication, making it a versatile tool for synchronizing various modules with its own clock generation.

    Source

User experience

  • The QCD + Expander is primarily used as a secondary clock, divider, or envelope trigger, distinct from the Tempi's versatility in percussion and sequence progression.

    Source
  • Some users find QCD's self-patchable nature to be a powerful feature, offering more creative clocking options than modules like Pamela's New Workout.

    Source

Comparisons

  • Unlike Tempi, QCD doesn't require remembering button combos, appealing to users who prefer straightforward operation without the need for cheat sheets.

    Source
  • QCD Expander users often compare its straightforward operation favorably against Pamela's New Workout, which requires some menu navigation for similar functions.

    Source

Use cases and applications

  • Tempi's usefulness is highlighted when paired with Rene v2 for sequence progression, a feature not mirrored by the QCD + Expander.

    Source
  • QCD is favored for pairing with Batumi to create interesting rhythmic modulations and shape QCD triggers, enhancing dynamic performances.

    Source

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Artist usage

Add artist
See how Andrew Huang uses 4ms QCD Expander

Andrew Huang

Singer, Guitarist

First Of October

...
Verified via YouTube

Visible throughout this November 26, 2019 video.

See how Pretty Lights uses 4ms QCD Expander

Pretty Lights

Bassist, Music Producer

...
Verified via Photo

Pretty Lights incorporated the 4ms QCD Expander into his modular rack setup during his episodic tour, as evidenced by a user-uploaded photo on Imgur.

Genre Usage

Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.

Used With

Based on how musicians on Equipboard use 4ms QCD Expander, it is most commonly used with the following gear.

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