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Doepfer A-137-1 Eurorack Wave Multiplier Module

£119.00 inc. UK VAT

£99.17 ex. VAT

Available on back-order

(Bear in mind prices on the UK site are shown including UK VAT. After entering your shipping address at checkout prices will update to show the correct taxes due to us based on your location. If purchasing internationally, VAT, handling fees, and import duties will potentially be due on delivery)

Product Info

A-137 is a voltage controlled wave multiplier. The basic idea of ??a wave multiplier is to multiply the waveform of an incoming signal (eg triangle/saw/sine from a VCO) within one period of the waveform. This leads to additional harmonics of the incoming signal. The period and consequently the pitch of the signals remains unchanged. The A-137 works as a kind of ” inverse low pass filter “, ie it adds a lot of harmonics to a signal that contains none or only a few harmonics (eg sine or triangle waveform). In contrast to that a low pass filter removes harmonics from a signal that contains a lot of harmonics (eg saw or rectangle waveform). Consequently the best results are obtained in combination with input signals poor in harmonics (eg sine or triangle). The A-137 can be used with signals rich in harmonics too (eg saw) but the effect is not as remarkable as for triangle or sine waves. For rectangle signals none or only little effects are obtained.

The A-137 is a very sophisticated wave multiplier that offers much more features, more controls and more waveform manipulations than other wave multipliers available so far. In addition all parameters are both manually adjusted and controlled by external voltages.


  • Width: 14hp
  • Depth: 65mm
  • Power: +40mA / -20mA

Manufacturer product page here.

Free Delivery for UK orders over £99

Terms and conditions apply

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