Synthesizer Modules, Making Music, Recording and Much More

Oakley – Discrete Ladder Filter

If you desire that thick Moog low pass sound then the Discrete Ladder Filter by Oakley Modular Systems might fit your needs perfectly.  This module is a reworking of the classic 1960’s low pass filter module using the circuits from the 904A filter and CP3 mixer and combining them into one excellent sounding module. The module also features a drive control which allows you to heavily overdrive the filter circuit without producing a big change in output volume.

The Discrete Ladder Filter comes in a 2U width with 1″ (25.4mm) knobs controlling 6 potentiometers.  3 of these controls are for mixing Inputs 1, 2 & 3.  The remaining potentiometers control Frequency, Resonance, Drive and Depth for CV Inputs 1 & 2

A 1V/Oct input available for keyboard tracking.

The module operates at +/- 15V and comes with a style power connector.

Discrete Ladder Filter Vendor Product Page
Product Documentation


  • Level 1: $285
  • Level 2: $275
  • Level 3: $265

All Prices are shown in CANADIAN DOLLARS
Click Here For Conversion
NOTE: Price levels are based upon the total number of modules purchased.  This includes modules purchased in the past
1   Module   = Level 1 Pricing
2   Modules = Level 2 Pricing
3+ Modules = Level 3 Pricing
– Shipping charges are extra

– Residents of Canada will be charged applicable taxes on sales
– Prices subject to change without notice
– Limited 1 Year Warranty Applies

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