Behringer DUAL ENVELOPE GENERATOR MODULE 1003 Eurorack Module

The Behringer DUAL ENVELOPE GENERATOR MODULE 1003 is a direct circuit recreation of the ARP 2500 Series dual envelope from the early 1970s — one of the most influential control voltage sources in synthesizer history. What you hear when you patch the 1003 into a VCA or filter cutoff is a particular vintage analog envelope shape: a slightly rounded attack onset, an initial decay that crests and falls with organic timing, and a final decay tail that breathes rather than cuts. That character defined the sound of a generation of recordings, and Behringer's recreation brings it into a standard Eurorack form factor at an accessible price. Both envelope generators are fully independent, letting you control separate voices or layer two modulation paths from a single module.

The module uses 3.5 mm TS jack connectivity throughout, compatible with any Eurorack ecosystem. Each of the two envelope generators responds to both Gate and Trigger signals, giving you flexibility in how events are initiated within your patch. The four control parameters — Attack, initial Decay, Sustain, and final Decay — differ from the modern ADSR convention in that the final stage is a secondary decay rather than a freeform release, which is precisely what gives 2500 Series patches their characteristic shape. Build quality reflects Behringer's budget-conscious manufacturing approach, but the circuit topology is the product here, and for patchers chasing that specific vintage envelope behavior without the cost of original hardware, the 1003 delivers where it counts.