Pricing and availability

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Reverb
$245.77 New
$264.82 Used
Thomann
4.8 (19)
$264.00 $262.00 $2.00 · All time low

Average Price: $258

Standard/Professional

$149

$350+

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Based on price data from 1 merchant for "Doepfer A-143-4". Prices shown reflect NEW condition. Tracking began Apr 7, 2026.

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Description

Unleash a world of sonic possibilities with the Doepfer A-143-4, a modular synthesizer that is as versatile as it is dynamic. Whether you're crafting lush soundscapes or exploring the depths of electronic experimentation, this module offers a robust platform for all your creative needs. At its core, the A-143-4 boasts four independent VCLFOs/VCOs with a triangle core, allowing you to generate everything from subtle modulations to complex waveforms. This makes it an ideal choice for musicians and sound designers who crave flexibility and precision in their modular setups.

The A-143-4 features intuitive control with integrated LEDs, giving you clear visual feedback as you tweak each oscillator's parameters. With a sum output, users can combine signals effortlessly, thanks to the internal jumpers that let you decide what should be summed. This functionality is perfect for those who want to create layered textures or intricate patterns in their musical compositions.

Designed in the Eurorack format, the A-143-4 is a seamless fit into any existing modular rig, occupying just 22 HP of rack space. Its ergonomic design ensures easy accessibility to all controls, making it suitable for both studio and live performance environments.

Key Features:

  • Four independent VCLFOs/VCOs with triangle core
  • Integrated LEDs for clear visual feedback
  • Sum output with selectable internal jumpers
  • Eurorack format, 22 HP width
  • Power requirement: +100 mA (+12V) / -100 mA (-12V)

Product specs

Available since January 2012
Width 22 TE / HP
Analog 1
variants Doepfer

FAQs

What is the primary function of the Doepfer A-143-4 module?

The Doepfer A-143-4 is a Quad VCLFO/VCO module designed for modular synthesizers, providing four independent voltage-controlled oscillators that can function as low-frequency oscillators or voltage-controlled oscillators.

How does the Doepfer A-143-4 integrate into a modular synthesizer setup?

The Doepfer A-143-4 fits within a Eurorack system with a width of 22 HP, making it compatible with standard modular synthesizer racks and setups.

Can the Doepfer A-143-4 be used for both audio and modulation purposes?

Yes, the Doepfer A-143-4 can function as both a VCLFO for modulation and a VCO for audio, offering versatility in sound design within a modular system.

What type of synthesis does the Doepfer A-143-4 utilize?

The Doepfer A-143-4 utilizes analog synthesis, providing a warm and classic sound characteristic typical of analog oscillators.

Is the Doepfer A-143-4 suitable for beginners in modular synthesis?

The Doepfer A-143-4 is suitable for both beginners and experienced users, offering straightforward functionality while providing depth for more complex patching possibilities.

Analog Resistance

Analog Resistance

Doepfer A-143-4 Quad VCLFO / VCO demo

Video thumbnail for Doepfer A-143-4 Quad VCLFO / VCO demo by Analog Resistance

Doepfer A-143-4 Quad VCLFO / VCO demo

Analog Resistance

Analog Resistance

Video thumbnail for One self patched Doepfer A-143-4 LFO by Leafcutter John

One self patched Doepfer A-143-4 LFO

Leafcutter John

Leafcutter John

Video thumbnail for Doepfer A-143-4 Quad VCLFO / VCO by Detroit-Berlin

Doepfer A-143-4 Quad VCLFO / VCO

Detroit-Berlin

Detroit-Berlin

Video thumbnail for Doepfer A-143-4 & A-124 - Sehen & Hören (2) by Andreas Thieme

Doepfer A-143-4 & A-124 - Sehen & Hören (2)

Andreas Thieme

Andreas Thieme

Video thumbnail for There might be noise... Doepfer A-143-4 Quad VCLFO/VCO insanity... by Sequenox

There might be noise... Doepfer A-143-4 Quad VCLFO/VCO insanity...

Sequenox

Sequenox

Reviews

PROS

  • Incredible frequency range, from ultra-slow to beyond audible

  • Versatile as both LFOs and VCOs, enhancing modular setups

  • Sync modes and FM functionality expand creative possibilities

  • Offers complex modulation when patched into itself

  • Can produce chords and maintain tune across octaves

  • Enables creation of evolving rhythms with square/gate outputs

  • Cross-modulation and sum outputs open new soundscapes

  • Excellent for both learning and advanced experimentation

  • Provides good value for its price

  • Acts as a comprehensive introduction to modular synthesis

CONS

  • Requires a warm-up period for stable operation, especially in hot climates

  • Struggles with tracking at higher pitches, not ideal for all musical applications

  • Limited to two waveforms, which may affect versatility

  • Tuning closely for "flangery" sounds results in dull tones rather than desired effect

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Doepfer A-143-4.

Features and functionality

  • The Doepfer A-143-4 quad VCLFO/VCO is highlighted for its versatility as both an LFO and VCO, adding significant modulation capabilities to a modular setup.

    Source
  • The A-152 Addressed T&H/Switch offers a unique feature set not found in other modules, though its large size can be a drawback for compact setups.

    Source
  • Doepfer A-138 mixers are DC coupled, suitable for both audio and CV, with a jumper providing a DC offset for channel 1 when unused.

    Source

User experience

  • Owners report the unpredictability of the A-196 Phase Locked Loop as a unique strength, offering sounds unlike any other module, especially when hitting the "sweet spot."

    Source
  • The A-119 External In module is praised for its ability to overdrive nicely, adding warmth and grit, particularly enhancing the sound of drum machines.

    Source
  • Owners find the Doepfer A-143-4's build quality and playability outstanding, enhancing the modular learning experience.

    Source

Comparisons

  • The A-151 Sequential Switch is valued for features like a reset input and selectable steps, making it distinct from other small sequential switches.

    Source

Mods and upgrades

  • It’s recommended to hot glue audio jacks on the Korg NTS-1 to prevent them from breaking off the PCB, addressing a common design flaw.

    Source

Use cases and applications

  • The A-138 mixer’s linear and exponential versions support different audio or CV applications, with exponential being more “natural” to the ear.

    Source

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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 Doepfer A-143-4, it is most commonly used with the following gear.

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