Used Doepfer A-137-2 Pro Sound Effects Unit

This Doepfer A-137-2 Wave Multiplier II Eurorack module is a deep wave shaping tool built for sculpting harmonically rich and aggressive sounds from otherwise simple waveforms. Designed as an evolution of Doepfer’s original wave multiplier concepts, this module focuses on transforming saw, triangle, and similar sources into complex, animated tones through multiple stages of wave processing. Its straightforward layout hides a surprisingly wide sonic range, from subtle harmonic enhancement to intense, tearing textures.

What makes the A-137-2 especially desirable is how musical and controllable its wave multiplication can be. By adjusting the multiplication and symmetry parameters, players can dial in anything from warm, evolving timbres to sharp, metallic overtones that cut through dense mixes. Doepfer’s circuits are widely respected for their precision and reliability, and this module is often favored by modular users who want classic analog character with enough flexibility for experimental sound design, leads, and evolving drones.

This module has been fully tested in store and functions as it should. We buy, sell, and trade used gear every day, making it easy to refresh or expand your modular setup. Take a close look at the listing photos to get a clear idea of the condition, as small cosmetic details may not be called out individually. Shipping availability and local pickup options are listed separately.