DOEPFER A-101-1V Vactrol Steiner Filter Eurorack Demo Circuit

( Brand: Doepfer ), ( Manufacturer Part Number: A-101-1V ), ( Type: Modular Synthesizer )

Review DOEPFER Vactrol Steiner Filter Vintage Eurorack Demo Perfect Circuit

The Doepfer A-101-1V is a versatile Vactrol Steiner filter module designed for Eurorack synthesizers. This filter offers a unique combination of low-pass, band-pass, and high-pass filtering, all controlled by a single voltage-controlled frequency (VCF) knob.

At its core, the A-101-1V features a Steiner-Parker multimode filter design, which utilizes Vactrol VCA elements for voltage-controlled filtering. Vactrol VCAs are renowned for their smooth and organic response, making this filter ideal for creating expressive and nuanced filter sweeps and modulations.

The filter's frequency response can be controlled through the VCF knob, which sweeps from low-pass to band-pass to high-pass modes. In low-pass mode, the filter allows all frequencies below the cutoff point to pass through, while attenuating frequencies above the cutoff. In band-pass mode, the filter allows frequencies around the cutoff point to pass, while attenuating frequencies significantly above and below. In high-pass mode, the filter allows only frequencies above the cutoff point to pass, effectively acting as a low-cut filter.

The A-101-1V also includes an envelope follower input, which can be used to control the filter's cutoff based on the input signal's amplitude. This can result in expressive filter modulations and dynamic filter sweeps, especially when used in conjunction with an ADSR envelope generator.

Additionally, the module includes an external input for processing external audio signals, a CV input for voltage-controlled filter cutoff, and a resonance control knob, which can be used to add self-oscillation and character to the filter's output.

The Doepfer A-101-1V is housed in a standard Eurorack format, with 32 HP width and a depth of 25mm. Its robust construction, combined with its versatile filtering capabilities, makes it an essential addition to any Eurorack modular synthesizer setup. Whether you're looking to create expressive filter sweeps, add character to your sounds, or process external audio signals, the A-101-1V Vactrol Steiner filter module is an excellent choice.

The Doepfer A-101-1V Vactrol Steiner Filter is a popular eurorack module known for its classic Steiner-Parker filter design. Here are some pros and cons that might help you make a decision about purchasing this module:

1. Authentic Steiner-Parker Filter Design: The A-101-1V provides an accurate reproduction of the original Steiner-Parker filter design, which is renowned for its distinctive sound character.

2. Versatile Filter Types: This module offers a wide range of filter types, including low-pass, band-pass, high-pass, and notch, providing extensive tonal shaping capabilities.

3. Self-Oscillating: The A-101-1V has a self-oscillating filter mode, allowing it to generate complex sounds and textures when used without an external audio input.

4. CV Control: The module offers CV control over the cutoff frequency and resonance, making it an excellent choice for modular synthesists seeking expressive control over their sounds.

5. Vactrol-based Design: The use of vactrols in the filter design adds an organic and warm character to the sounds produced, which some users prefer over more modern, digital filters.

1. Size: The A-101-1V is a 24HP module, which might be a consideration for those with limited rack space.

2. Price: Compared to some other filter options in the eurorack world, the A-101-1V can be considered relatively expensive.

3. Power Consumption: This module consumes 110mA 12V and 60mA -12V, which might impact your power distribution planning.

The Doepfer A-101-1V Vactrol Steiner Filter is an excellent choice for eurorack enthusiasts seeking a classic filter design with a warm, organic sound character and extensive tonal shaping capabilities. Its versatility, self-oscillating capabilities, and CV control make it an essential module for any modular synthesis setup. However, its size, power consumption, and cost might be a consideration for some users. Ultimately, if you value the authentic Steiner-Parker filter design and the unique sound it brings to the table, the A-101-1V is a worthwhile investment.

part # a1011v prices

• $179.00-$207.00

specifications synthesasha:

• brand: Doepfer
• manufacturer part number: A-101-1V
• type: Modular Synthesizer

general synthesasha:

• Musical Instruments Gear > Pro Audio Equipment > Synthesizers
• condition: Open box

shipping synthesasha:

• type: Fixed
• service: Standard
• transit: 2-5 Days
• class: Standard
• cost: $0.00

seller synthesasha:

• rating: 99.2%
• # reviews: 47236

returns synthesasha:

• paid by: Buyer
• policy: Returns Accepted
• time: 30 Days
• method: Money back

payments synthesasha:

• wallet: Google-pay
• credit card: Discover
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offer synthesasha:

• options: Ship-to-home
• availability: In Stock
• started: April 2, 2025
• sold: 0
• quantity: 2

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