Doepfer A-101-1 Vactrol VCF

$5.93 to $140.00 Price Tier: Budget

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Page last updated Jul 04, 2026

Pricing and availability

We compare 600+ stores and found this item at 2 stores. Prices updated July 4, 2026.

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3.0 (1)

$5.93 3 available New

$179.00 1 available Used

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4.8 (10)

$141.00 $140.00 $1.00 · All time low

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Average Price: $108

Budget/Beginner

$149

$350+

Price Tier

In the Modular Synthesizers category, Doepfer A-101-1 Vactrol VCF 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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Price History

Based on price data from 1 merchant for "Doepfer A-101-1 Vactrol VCF". Prices shown reflect NEW condition. Tracking began Apr 19, 2026.

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Description

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Discover the Doepfer A-101-1 Vactrol VCF, a modular synth filter that merges the classic charm of the Steiner Parker design with modern ingenuity. Utilizing vactrols instead of traditional diodes for frequency control, this module offers a unique sound character that is both versatile and expressive. Whether you're crafting lush pads or piercing leads, the A-101-1 provides a rich palette of sonic possibilities.

The inclusion of two LEDs offers immediate visual feedback on frequency and resonance settings, ensuring you stay in control even during the most complex patches. This feature not only enhances usability but also adds an intuitive touch to your creative process. Designed with a compact width of 16 HP, the A-101-1 effortlessly integrates into any Eurorack setup, making it an ideal choice for both seasoned modular enthusiasts and newcomers alike.

For the intuitive synthesist, the A-101-1 Vactrol VCF delivers an engaging blend of analog warmth and cutting-edge tech. Whether you're exploring ambient textures or diving into experimental soundscapes, this module promises a dynamic and fluid interaction with your music.

Key Features:

Vactrol-based frequency control for distinct sound character
Dual-LED display for frequency and resonance feedback
Compact design with a width of 16 HP
Compatible with Eurorack systems
Power requirements: +30 mA (+12 V) / -30 mA (-12 V)

Product specs

Available since	March 2006
Width	16 TE / HP

FAQs

What type of filter is the Doepfer A-101-1 Vactrol VCF?: The Doepfer A-101-1 is a vactrol-based voltage-controlled filter (VCF), known for its smooth and musical response, often used to achieve a warm, organic sound.
How many filter modes does the Doepfer A-101-1 offer?: The Doepfer A-101-1 provides multiple filter modes, including low-pass, high-pass, and band-pass, allowing for versatile sound shaping in modular synthesizer setups.
Is the Doepfer A-101-1 Vactrol VCF suitable for beginners in modular synthesis?: Yes, the Doepfer A-101-1 is suitable for beginners, offering intuitive controls and a distinct sound character that can easily integrate into a modular system, enhancing learning and experimentation.
What is the width of the Doepfer A-101-1 Vactrol VCF in a modular setup?: The Doepfer A-101-1 Vactrol VCF has a width of 16 TE/HP, making it a compact yet powerful addition to any Eurorack modular synthesizer system.
How does the vactrol technology in the Doepfer A-101-1 affect its sound?: Vactrol technology in the Doepfer A-101-1 imparts a smooth, natural response with a slower attack and decay, contributing to its warm and musical sound signature ideal for various musical styles.

Videos

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Zoë Blade

Doepfer filter comparison / shootout

Zoë Blade

Doepfer A101-1 Vactrol Multitype Filter Review

SoloStuff

Doepfer A-101-1 Vactrol Filter: overview (LMS Eurorack Expansion Project)

Chris Meyer's Alias Zone + Learning Modular

Reviews

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PROS

Offers a unique, warm, and fuzzy sound character
Allows independent control over LP, BP, and HP filter outputs
Versatile with the ability to input different signals to LP, BP, and HP
Provides a wide palette of filtering options without repatching
Highly affordable compared to more exotic alternatives
Encourages creativity with abundant modulation possibilities
Smooth resonance sound with adjustable mixing of lowpass and bandpass

CONS

Highpass filter responds minimally to modulation

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Doepfer A-101-1 Vactrol VCF.

Features and functionality

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The Doepfer A-101-1 has separate inputs for low, band, and high pass, offering versatile mixing options for different sounds like kick, snare, and hats.
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While the A-106-1 Xtreme filter is mentioned, it's noted not to be as "extreme" as one might expect, suggesting potential limitations for aggressive filtering needs.
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User experience

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Owners appreciate using the A-101-1 as part of a mid-side stereo pair, providing flexibility in sound staging.
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The resonance on the A-101-1 can be difficult to control, suggesting a learning curve for achieving desired sound characteristics.
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Comparisons

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The A-101-1 isn't favored over other filters due to its sound, indicating it may not be the top choice for those seeking unique tonal qualities.
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The A-101-1 is preferred over dedicated drum modules by some users who appreciate its ability to generate a variety of sounds, including robust kicks, without limiting module functionality.
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Use cases and applications

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The A-101-1 Vactrol filter can be effectively used to create strong kick sounds with a self-resonating filter and an envelope, highlighting its versatility beyond traditional filtering.
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Mods and upgrades

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It's suggested that pairing the A-101-1 with a gentle high-pass filter can enhance sound quality by managing inaudible frequencies at low pitches, especially for kick creation.
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