Doepfer A-101-6

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Doepfer A-101-6

Doepfer

A-101-6

4.5 Expert Rating

Product Info

Article Number: 370400
Brand: Doepfer
Model: A-101-6
Price: $113.30

* Prices may vary. Check retailer for current pricing and availability.

The A-101-6 is a characterful filter module offering a warm, organic sound thanks to those Opto-FETs. It’s a great addition for those building Eurorack systems looking for a unique, vintage-inspired filter that doesn’t take up too much space – perfect for experimental sound design and mellow pads.

Product Description

Doepfer A-101-6, Six Stage Opto FET VCF, New filter module in which so-called opto FETs are used to control the filter frequency, Dimensions (W x D): 40.3 mm (8 HP) x 65 mm, Power requirement: 40 mA

PROS
  • • Opto-FETs deliver a unique, warm, and resonant filter character
  • • Excellent Doepfer build quality – robust and reliable
  • • 8HP footprint makes it space-efficient in modular systems
  • • Provides a distinct alternative to standard VCF designs
CONS
  • • Opto-FETs can be more sensitive to power fluctuations
  • • Limited resonance control compared to some other filters
  • • The filter’s character might not suit all musical styles

Product Video

Key Features

Filter Type Six-Stage Opto FET Voltage Controlled Filter
Modes Continuous sweep, no discrete modes
HP Width 8
Depth 65 mm
Power Draw 40 mA
CV Inputs One CV input for cutoff frequency control

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Frequently Asked Questions

Opto-FETs introduce a softer, more gradual response and a distinct warmth, lacking the sharp edges sometimes found in op-amp designs, adding a pleasing saturation.
The CV input is a direct pass-through; attenuation is not built-in, requiring external attenuation if finer control is needed.
Doepfer’s engineering ensures a comfortable fit, and while compact, the build quality is solid; there's no sense of it being overly cramped or sacrificing reliability.

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