Behringer 1003 Dual Envelope Generator — Eurorack

Behringer's recreation of the ARP 2500-series 1003: two complete, independent envelope generators in one 16 HP panel, laid out as a mirrored L and R pair with a knob per stage.

Worth knowing that this is a four-stage design with ARP's own terminology, not a standard ADSR — Attack Time, Initial Decay Time, Sustain Level, and Final Decay Time. That extra final decay stage is what lets you shape a release independently of the decay into sustain, which is the reason people go looking for this module rather than using a generic envelope.

Each side has its own Single/Multiple trigger mode switch and a manual gate button, plus both positive and inverted outputs — so you can drive a VCA and simultaneously sweep a filter in the opposite direction from one envelope.

Features:

• Two fully independent envelope generators (L and R)
• Four stages per envelope: Attack Time, Initial Decay Time, Sustain Level, Final Decay Time
• Single / Multiple trigger mode switch per side
• Manual gate button per side
• Gate and Trig inputs
• Positive and inverted (− / +) outputs for each envelope
• 16 HP Eurorack

Condition — Good: Fully functional, powered and tested in a working system before removal. Faceplate shows light handling marks consistent with rack use; see photos. All eight knobs, both toggle switches, both manual gate buttons, and all jacks work correctly. No modifications, no repairs, PCB clean with no damage or corrosion.

Includes: Module, power ribbon cable, and mounting screws. No original box.