DOEPFER A-128 Filter Bank Detroit Modular

( Brand: Doepfer ), ( Model: DOEPFER A-128 FIXED FILTER BANK ), ( Type: Modular Synthesizer ), ( Manufacturer Part Number: A-128 )

Review DOEPFER Fixed Filter Bank New Detroit Modular

The Doepfer A-128 Filter Bank is an impressive and versatile module in the Detroit Modular series, designed and manufactured by Doepfer Synthesizer in Germany. This filter bank offers an extensive range of low-pass, band-pass, and high-pass filtering capabilities, making it an essential addition to any modular synthesizer setup.

The heart of the A-128 is its twelve 24dB ladder-type filters, each with its CV input for controlling cutoff frequency. These filters can be used individually or in various combinations, providing a multitude of filtering possibilities. The filter bank is also equipped with an envelope follower, which can be assigned to any of the twelve filters, allowing for dynamic filtering based on the input signal's amplitude.

One of the standout features of the Doepfer A-128 Filter Bank is its selectable filter modes. Each filter can be switched between 12dB and 24dB resonant modes, providing a more subtle or aggressive filter response depending on the desired sound. Additionally, the filter bank includes a global resonance control, allowing for the resonance to be applied to all filters at once, creating complex and rich textures.

The A-128 also includes an external input for processing audio signals, making it an excellent choice for processing external sounds or integrating it into a live performance setup. Moreover, the module features a dedicated headphone output, allowing for individual filter monitoring, aiding in fine-tuning and sound design.

The design of the A-128 Filter Bank is compact and user-friendly, with clear labeling of all inputs, outputs, and controls. Its sturdy construction, coupled with Doepfer's reputation for high-quality components, ensures reliable and stable performance. The module is also fully compatible with the Detroit Modular system and can be easily integrated into any Eurorack modular synthesizer setup.

In conclusion, the Doepfer A-128 Filter Bank is a powerful and versatile module that offers a wealth of filtering possibilities for modular synthesists. Its extensive range of filtering capabilities, selectable filter modes, and compatibility with both modular synthesizer systems make it an indispensable tool for creating intricate and expressive sounds.

The Doepfer A-128 Filter Bank is a versatile and powerful filtering solution offered by Detroit Modular, a well-known name in the modular synthesis community. This filter bank module can be a valuable addition to any modular synthesizer setup due to its unique features and capabilities. However, like any electronic musical instrument or equipment, it comes with its own set of advantages and disadvantages.

1. Versatility: This filter bank module offers a wide range of filter types, including 12 and 24 dB low-pass, high-pass, band-pass, and notch filters. This versatility allows for various sound design possibilities.

2. Stereo Processing: The A-128 Filter Bank can process both stereo audio signals and individual channels, providing additional creative possibilities.

3. CV Control: The module offers CV control over cutoff frequency, resonance, envelope, and filter types, enabling users to create complex and dynamic sounds.

4. Sync and Key Inputs: The A-128 Filter Bank includes sync and key inputs, providing the ability to synchronize the filter envelope to an external signal or play chords with a keyboard.

5. Self-Oscillating Filters: The module's self-oscillating filters can function as audio sources, generating unique sounds and textures.

1. Size: The A-128 Filter Bank is a relatively large module, measuring 28 HP, which might be a concern for those with limited rack space.

2. Complexity: With its numerous filter types, CV control options, and additional features, the A-128 Filter Bank can be quite complex for beginners or those new to modular synthesis.

3. Price: Compared to some other filter bank modules in the market, the Doepfer A-128 Filter Bank can be considered relatively expensive.

The Doepfer A-128 Filter Bank is a powerful and versatile filtering solution that offers a wide range of filter types, stereo processing capabilities, and CV control options. Its disadvantages include its size, complexity, and relatively high price point. However, for those seeking advanced sound design capabilities and the ability to process stereo audio signals, the A-128 Filter Bank is an excellent investment.

If you are a modular synthesist looking to expand your sound design possibilities, the Doepfer A-128 Filter Bank is an excellent choice. Its versatility, stereo processing capabilities, and CV control options make it a valuable addition to any modular setup. However, it is essential to consider its size, complexity, and price before making a purchase. If these factors are not a concern, the Doepfer A-128 Filter Bank is an excellent investment for your modular synthesis journey.

part # a128 prices

• $259.00-$422.94

specifications synthesasha:

• brand: Doepfer
• model#: DOEPFER A-128 FIXED FILTER BANK
• type: Modular Synthesizer
• manufacturer part number: A-128

payments synthesasha:

• other
• credit card: Discover
• wallet: Google-pay

general synthesasha:

• condition: New
• Musical Instruments Gear > Pro Audio Equipment > Synthesizers

shipping synthesasha:

• carrier: UPS, USPS
• class: Standard
• cost: $0.00
• service: UPS Ground, USPS Ground Advantage
• type: Fixed
• transit: 5-9 Days

seller synthesasha:

• rating: 100.0%
• # reviews: 2698

returns synthesasha:

• policy: Returns Accepted
• time: 14 Days
• paid by: Buyer
• method: Money back

offer synthesasha:

• availability: In Stock
• quantity: 2
• options: Ship-to-home
• started: January 18, 2026
• sold: 0

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