18dB Low Pass (TB303 type)

Module A-103 is a voltage controlled low pass filter with 18dB/octave slope. The circuit is based on a modified transistor ladder (Moog ladder) and is a reproduction of the legendary TB303 filter.

As for the rest the A-103 is identical to the A-120 Moog low pass filter (same controls, inputs/outputs) only the filter sound is different.

The English user's manual is available on the Doepfer web site as pdf file.


  • 30 mA +12V
  • 10 mA -12V
  • 0 mA 5V
  • 55 mm deep
  • Ø 4.23 (13 Votes) Average Rating

This Module is currently available.

$115 Price in €
8 HP Filter
submitted Oct 6th 2012, 13:36 by rafe127 | last Change Oct 16th 2018, 05:58 by cds