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Doepfer A-138b Vintage Edition

Doepfer A-138b Vintage Edition

Doepfer A-138b Vintage Edition, mixer, potentiometers with logarithmic response, so especially suitable for audio signal mixing, black Front Panel

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10 customer ratings:

Overall rating
4.8 out of 5 stars
handling
features
sound
quality
5 Stars
8 Customers

8 customers have given this product a 5-star rating.

Of these, 5 customers have written no texts or given their feedback in another language.

read all 3 reviews
4 Stars
2 Customers

2 customers have given this product a 4-star rating.

No customer has written a text about this; or they have written a text in a different language.

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3 Stars
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Total
handling
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– Assumed from Doepfer A-138b

Doepfer A-138-B Mixer

Blair, 18.11.2013
The A-138b is essentially a 4 into 1 mixer optimised for audio signals rather than control voltages. the 'b' in the name means the the mixer uses logarithmic rather than linear potentiometers.

For me the A-138b is an essential piece of equipment because it enables me to sum the outputs of up to 4 sound sources (for instance VCO's or noise sources) before sending the combined output to my A-108 Low pass filter module.

With one input employed, and with the channel and master levels set to 10, the volume of the output is the same level as the input signal. in other words, this module will not increase the gain of an input, it will only attenuate it.

When using multiple inputs I find I have to reduce the levels of the individual channels quite a lot, otherwise the output from the mixer becomes to much for next module in the chain. So if I am using 3 inputs, I will use a maximum of about 33% of each channel's volume.

The mixer appears to operate very quietly. It does not introduce much 'hiss' into the sound. Some reviewers have found otherwise , so it may be that my ears are not as sensitive as theirs.

I have rated the A-138b as 5 stars except for features, which I have given a 4 for. The reason for this is that the Doepfer website indicates that with no input into channel 1, the channel 1 level will act as a +5 volt DC offset. In other words, the unit *can* increase the level beyond that of an input signal. However, my unit doesn't work like this. As delivered, all 4 inputs on my A-138b work in the same way. The manual says there is a jumper I need to re-position on the rear of the circuit board to achieve the +5 volt DD offset with input level 1. I think this option should have been made available as a toggle switch on the front panel. It would be useful on occasions when I am only using 3 inputs, but I do not want to have to remove the unit from its case and re-position a jumper each time to achieve this!

Overall, another useful and great value unit from Doepfer, in my opinion.
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Total
handling
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– Assumed from Doepfer A-138b

Mixer for all seasons

LiamJ, 10.02.2015
If your modular system is growing and you don't have a mixer, buy one. If you have more than 1 Oscillator in your setup, a white noise module or separate drum modules, you'll want this to to mix your sounds nicely, super simple but super effective and does the job it was set out to do.
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Show variations of this product
Doepfer A-138b Vintage Edition
(10)
Doepfer A-138b Vintage Edition

Doepfer A-138b Vintage Edition, mixer, potentiometers with logarithmic response, so especially suitable for audio signal mixing, black Front Panel

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-110-1
(53)
Doepfer A-110-1
to the product
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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...

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-180-2 Multiples
(44)
Doepfer A-180-2 Multiples

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:...

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-124 Wasp Filter SE
(15)
Doepfer A-124 Wasp Filter SE

Wasp Filter Special edition, Black front, Yellow knobs

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-140
(43)
Doepfer A-140

ADSR Envelope Generator The module A-140 is a envelope generator and since it delivers control voltages, belongs to the modulation-modules. As soon as the ADSR is triggered at gate-input, it...

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-138b
(40)
Doepfer A-138b

Mixer ModuleModule A-138 is a four-channel mixer that can be used for mixing control voltages as well as for mixing audio signals. A separate attenuator is available for each of the four inputs. In...

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-100 LC1 Low Cost Case
Doepfer A-100 LC1 Low Cost Case
to the product
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Doepfer A-100 LC1 Low Cost Case for Eurorack Modules; build-in Power Supply A-100SSB (+12V/380 mA, -12V/380mA); 48 TE Version of the A-100LC3; build-in Bus Board with 8 Module connectors; Housing...

  • Module: No
  • Empty Rack, Or Housing: Yes
  • Basic System: No
  • Accessories: No
Doepfer A-143-2
(18)
Doepfer A-143-2
to the product
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Quad ADSRThe module contains 4 independent ADSR envelope generators. Each sub-module has the controls Attack, Decay, Sustain and Release. With the 3-stage range switch, the desired time range can be...

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-132-3
(19)
Doepfer A-132-3

Module Dual linear/exponential, VCA

  • Module: Yes
  • Empty Rack, Or Housing: No
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Doepfer A-199 Spring Reverb Module
(31)
Doepfer A-199 Spring Reverb Module
to the product
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Spring Reverb ModuleDoepfer A-199 is a spring reverb module, which electronically simulates the reverb effect with the aid of spiral springs. Spring reverb systems have a characteristic sound...

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-180-3 Dual Buffered Multiple
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Doepfer A-180-3 Dual Buffered Multiple

Doepfer A-180-3 Dual Buffered Multiples, dual buffered 1-in-3 multiple to copying/buffering of control and audio signals, Width: 4 TE / 4HP / 20.0 mm

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-111-2
Doepfer A-111-2
to the product
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Doepfer A-111-2; High End VCO II / VCLFO; Width: 14 HP, Current: +70mA (+12V) / -50mA (-12V)

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-119
(28)
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...

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-106-5 SEM Filter
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Doepfer A-106-5 SEM Filter

Filter 12 dB Multi-mode filter, in which the circuit of the SEM module is used, Width: 8HP 40.3 mm, Depth: 55 mm (measured from the rear of the front panel), Power requirements: +30 MA (+ 12V) /...

  • Module: Yes
  • Empty Rack, Or Housing: No
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Doepfer A-118 Noise/Random
(36)
Doepfer A-118 Noise/Random

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...

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-131
(24)
Doepfer A-131

VCA (Voltage Controlled Amplifier)The A-131 module is a voltage-controlled amplifier. An exponential VCA (A-131) is usually used for audio applications, while a linear VCA (A-130) is used for...

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-124 Wasp Filter
(35)
Doepfer A-124 Wasp Filter

Wasp Filter Module A-124 is a special 12 dB multimode filter using the "strange" filter circuit of the "EDP Wasp" (an analog synthesizer with black/yellow case built end of the seventies,...

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-157 Trigger Sequencer Subsys
(2)
Doepfer A-157 Trigger Sequencer Subsys
to the product
509 €

Doepfer A-157 Trigger Sequencer Subsystem 1-2-3, contains: A-157-1 Trigger Matrix (8x16) + A-157-2 Output Module and A-157-3 Input Module, generate up to eight trigger signals controlled by a 8x16...

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-110-2
(11)
Doepfer A-110-2
to the product
119 €

Basic VCO for the A-100 modular system Voltage controlled oscillator, 3-Position toggle switch, Linear FM input and soft-sync input, Tune control range can be set between approx. 1/2 octave and 4...

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-155
(17)
Doepfer A-155
to the product
299 €

Analog and Trigger Sequencer for Modular System A-100 The following functions are available for the two analog rows (rotary knobs): 8 Rotary potentiometers, Scale (stepless knob) on the lower...

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-145 LFO Modulation Generator
(28)
Doepfer A-145 LFO Modulation Generator

LFO Modulation Generator The module A-145 (LFO) is a low frequency oscillator, which generates periodic control signals in a wide frequency range. Five wave forms are available: saw tooth, inverted...

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
70 €
Price includes VAT, shipping costs extra
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Available immediately

This item is in stock and can be dispatched immediately.

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item number 383631
sales unit 1 piece
available since April 2016
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in this category Rank 180
at thomann.de Rank 35326
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Offers include 24% Greek VAT and are valid as long as stocks last. Shipping costs to Greece are 20 EUR, free shipping on orders above 298 EUR. Please click here for international Shipping rates. We do not accept liability for typographical errors or inaccurate information of any kind. *RRP = manufacturer's / distributor's recommended retail price in Germany
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