Doepfer A-132-1

Dual VCA

The module A-132-1 contains two voltage controlled amplifiers with a linear characteristic, which are mainly designed for controlling the amplitude of control signals (e.g. for ADSR-height, in/out-swing-vibrato, etc.). In uncritical, high-level applications, the VCAs can also be used for audio signals (e.g. regulate VCO outputs).

For gain control, two control voltage inputs are available. The control voltages applied to them are summed.

  • Linear voltage controlled amplifier
  • Width: 4 HP
  • Depth: 35 mm
  • Power requirements: +20 mA (+12 V) / -10 mA (-12 V)

Further Information

Width 4 TE / HP
exponential No
linear Yes
9 Customer Ratings:
  • 5
  • 4
  • 3
  • 2
  • 1
4.6 /5
  • handling
  • features
  • quality
Total
William6729, 19.11.2015
This is a basic but very useful dual VCA. It is a linear VCA and so is better suited for CV signals rather that audio signals.

It is very much a "what you see, is what you get". So you cannot attenuate signals going in or out with just this module. This is not the best option for the only VCA in your system, it should be an addition to a system with other more fully featured VCAs.

Ultimately, this is a cheap module, and a cost effective way adding more VCAs. Additionally its small size is plus as it does not take up to much space and is great for filling up 4 hp of rack space.
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Total
Space saving that was s already
DiSp, 11.09.2013
Module A-132-1 (new designation) is a space-saving module when it comes to inserting an amplitude control in the signal path.

However, the A-135-1 clearly has the advantage in the interplay with the quad modules.
For example, in order to control four signals (quad modules) with a different amplitude sequence, two A-132-1 are required and a mixing module, eg A-138 (a / b). This results in 2 * 4 plus 1 * 8 = 16TE. Here, however, an A-135-1 with 18TE offers much more possibilities, since both the signal and the CV can be adjusted.
Also the division into four rows at the A-135-1 leads then to a much clearer cabling than with the A-132-1 with mixing module.

Price is the A-135-1 ultimately also cheaper than the mentioned combination.
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£58
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