Doepfer A-138D

Crossfader/ FX Insert

  • Can be used as a crossfader between two signals or as an insert for external effects
  • Euro rack format
  • Width: 8 HP
  • Depth: 40 mm
  • Power consumption: +20 mA (+12V)/ -20 mA (-12V)

Further information

Width 8 TE / HP

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4.6 / 5.0
8 written ratings Read all reviews
Total

Dieter Doepfer - Modular King!

TerenceB, 14.10.2014
It was Dieter Doepfer who first came up with the Eurorack format now adopted by pretty well all of the world's analog modular bods. Whereas some of the newcomers to the scene produce multifunctional kit laden with a sometimes tiresome "attitude", Doepfer modules remain modest and simple affairs, each one doing one or things and leaving it up to the user how he or she wants to hook them up. The A-138D is also in this style, acting simply as input amplifier or output attenuator. I thought I'd give one a try having read a few interesting remarks on the Muff Wiggler forum (which every analog head reads), and because I have a large collection of interesting stompboxes that I fancied integrating. And the results have been interesting, especially when positioning fuzz and distortions directly after the VCO stage. Results can be hit and miss depending on box you use, the modules you are using and where you patch them in, but this kind of experimentation is par for the course and part of the fun of building your own modular system. I'd call it a successful punt!
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Total

Nope..gonna get something else

30.03.2015
Have tried to use this module quite a lot of times as aux/return for distortion pedals, filters, as audio input from my computer and as "pre-amp" for a spring reverb.

With destortion pedals it was very hard to supress feedback. When no audio came in, feedback swelled up horribly.

Using it with a sherman filter, it tended to color the sound too much and creating sudden resonant peaks (probably also the feedback)

While with the spring reverb, the gain was not enough to get the spring sound to a high enough level and be audible along the rest, while not being mostly amplified background noise.

Lastly, somehow the audio coming into the module bleeds through to other modules on the same rail..

Starting to think I got a damaged module..
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Show variations of this product
Doepfer A-138D
(14)
Doepfer A-138D

Crossfader/ FX Insert Can be used as a crossfader between two signals or as an insert for external effects, Euro rack format, Width: 8 HP, Depth: 40 mm, Power consumption: +20 mA (+12V)/ -20 mA...

  • Width: 8 TE / HP
  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
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Doepfer A-124 Wasp Filter SE

Wasp Filter Special edition, Special 12 dB multimode filter, Circuit technology of the "EDP Wasp", Black front, Yellow pot caps, Width: 8 HP, Depth: 45 mm, Power requirements: +30 mA (+12 V)/-10 mA...

  • Width: 8 TE / HP
  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-119
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Doepfer A-119

External Input / Envelope FollowerModule A-119 is used to integrate external audio signals into the system A-100, and includes the components pre-amplifiers, envelope follower and a comparator. The...

  • Width: 8 TE / HP
  • Module: Yes
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  • Accessories: No
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Doepfer A-138s Mini Stereo Mixer

Mini Stereo Mixer 4-in-2 mix module in Eurorack format, Four inputs with attenuator and pan control, plus two 3.5 mm mini jack outputs, Width: 8 HP, Depth: 30 mm, Power requirements: +10 mA (+12 V)...

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  • Module: Yes
  • Width: 8 TE / HP
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  • Accessories: No
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Passive Multi-Port Distributor 8x Interconnected jacks, Sockets are divided into 2x quadruple groups; but can also be modified to an eight-multiple (soldering bridge on the circuit board), Width:...

  • Width: 2 TE / HP
  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-100 LC1 Low Cost Case
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Doepfer A-100 LC1 Low Cost Case
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Case for Eurorack Modules Integrated power supply A-100SSB: +12 V / 380 mA, -12 V / 380 mA, To 48 TE shortened A-100LC3 version, Built-in bus board with 8 module slots, Casing made of raw wood -...

  • System: Eurorack
  • Module: No
  • Width: 48 TE / HP
  • Empty Rack, Or Housing: Yes
  • Hight: 3 U
  • Power Supply: Yes
  • Basic System: No
  • Accessories: No
  • Power Supply Specifications: +12V/380 mA, -12V/380mA, +5V/100mA, +12V und +5V dürfen max 380mA betragen
  • Formfactor: Case
Doepfer A-132-3
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Doepfer A-132-3

VCA Switchable characteristic between linear and exponential, Audio and CV signals can thus be optimally processed, Width: 8 HP, Depth: 50 mm, Power requirements: +30 mA (+12 V)/-30 mA (-12 V)

  • Width: 8 TE / HP
  • exponential: Yes
  • Module: Yes
  • linear: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
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Doepfer A-198 (Module + Manual)
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Trautonium Controller Consists of Doepfer A-198 Module and Ribbon Controller, Ribbon Controller: Generates a control voltage for the pitch of the oscillators by touching the position sensor,...

  • Width: 8 TE / HP
  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
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Doepfer A-110-1
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Doepfer A-110-1
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Standard VCO for Modular System A-100Module A-110-1 (VCO) is a voltage controlled oscillator. The A-110-1 produces frequencies in a range of about 8 octaves, of which four waveforms are available...

  • Analog: Yes
  • Module: Yes
  • Digital: No
  • Width: 10 TE / HP
  • Empty Rack, Or Housing: No
  • variants: Doepfer
  • Basic System: No
  • Accessories: No
Doepfer A-160-2 Clock Divider II
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Doepfer A-160-2 Clock Divider II

Frequency divider For clock/trigger/gate signals, Width: 4 TE/ 4 HP / 20 mm

  • Width: 4 TE / HP
  • Module: Yes
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  • Accessories: No
Doepfer A-118 Noise/Random
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Noise/Random Voltage Generator Module A-118 is a noise and random voltage generator. It produces the following signals: white noise, coloured noise, and random voltage. White and coloured noise can...

  • Width: 8 TE / HE
  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
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Mixer with Logarithmic Potentiometers Primarily suitable for audio signals, Width: 8 HP, Depth: 35 mm, Power requirements: +10 mA (+12 V) / -10 mA (-12 V)

  • Modul Type: Mono
  • Module: Yes
  • Width: 8 TE / HP
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
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