ehringer System 100 140 Dual Envelope/LFO, $79!

The Behringer System 100 140 Dual Envelope/LFO module is a versatile Eurorack module inspired by the classic Roland System 100M. This module provides two independent ADSR (Attack, Decay, Sustain, Release) envelope generators and a flexible low-frequency oscillator (LFO), making it an essential tool for shaping and modulating your modular synthesizer sounds.

Key Features:

Dual Envelope Generators:

  • Two Independent ADSR Envelopes: Each envelope generator can be used independently, allowing for complex modulation setups.
  • ADSR Controls: Each envelope features four controls (Attack, Decay, Sustain, Release) for precise shaping of the envelope characteristics.
  • Gate Inputs: Each envelope has a dedicated gate input, allowing for external triggering and synchronization.
  • Manual Gate Buttons: Provides manual gate triggering for real-time control and testing.

Low-Frequency Oscillator (LFO):

  • LFO with Multiple Waveforms: The LFO section offers several waveforms, including triangle, square, and random, for versatile modulation options.
  • Frequency Control: Allows for adjustment of the LFO rate, enabling slow modulations or fast, rhythmic effects.
  • LFO Outputs: Multiple outputs for routing the LFO signal to various destinations within your modular system.

Sound Characteristics:

  • Dynamic Modulation: The dual ADSR envelopes provide precise control over the attack, decay, sustain, and release phases of your sounds, enabling everything from sharp, percussive hits to smooth, evolving textures.
  • Versatile LFO: The LFO offers a wide range of modulation speeds and waveforms, adding movement and complexity to your patches.


  • Sound Design: Ideal for shaping and modulating the dynamics of your sounds, whether you’re creating punchy basslines, lush pads, or intricate effects.
  • Modular Synthesis: A key component for any modular synthesizer setup, providing essential modulation sources for controlling filters, oscillators, VCAs, and more.
  • Live Performance: Suitable for live use, offering hands-on control over envelope and LFO parameters for dynamic and expressive performances.


  • Width: 16 HP
  • Depth: 35 mm
  • Power Consumption: 80 mA (+12V), 70 mA (-12V)
  • Inputs: Gate inputs for each envelope generator
  • Outputs: Envelope outputs for each ADSR, multiple LFO outputs
  • Controls: Attack, Decay, Sustain, Release for each envelope; frequency control for LFO

Country of Manufacture:

  • China: The Behringer System 100 140 module is manufactured in China, ensuring affordability while maintaining quality standards.

Notable Features:

  • Dual independent ADSR envelope generators
  • Comprehensive ADSR controls for precise envelope shaping
  • Versatile LFO with multiple waveforms and frequency control
  • Manual gate buttons for real-time control
  • Compact design suitable for Eurorack systems

Notable Users:

While specific high-profile users of the Behringer System 100 140 module may not be extensively documented, it is popular among:

  • Modular Synth Enthusiasts: Those who appreciate versatile and affordable envelope generator and LFO modules for their Eurorack systems.
  • Sound Designers: Professionals who require detailed control over sound dynamics and modulation.
  • Electronic Musicians: Artists who use modular synthesizers to explore dynamic and expressive soundscapes.

The Behringer System 100 140 Dual Envelope/LFO module is a powerful and versatile addition to any Eurorack modular synthesizer system. With its dual ADSR envelope generators and flexible LFO, the 140 module offers comprehensive control over the dynamics and modulation of your sounds. Whether you’re a sound designer, modular synth enthusiast, or live performer, this module provides the tools you need to create dynamic, expressive, and evolving sounds. Its compact design and high-quality construction make it an excellent choice for those looking to expand their Eurorack setup with a reliable and multi-functional module.

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