DoepferA-105 24dB SSM2044 Low Pass Filter

Doepfer A-105

The Doepfer A-105 is a modular adaptation of the fat 24 dB/oct low pass found in synths such as the Korg MonoPoly, PPG Wave, and Fairlight II. Its voltage-controllable resonance, bass compensation, and smooth sine wave behavior at higher resonance settings make it an ideal filter for use with complex and/or digital oscillators.

A-105 Features

• SSM2044-based analog low pass filter
• Two cutoff frequency CV inputs
• Resonance CV input
• 1V/oct self-oscillation tracking