Vast Polyphony & Multitimbrality: The module features an impressive 128-voice polyphony alongside 32-part multitimbrality. Powered by a dual-port MIDI design (MIDI A and MIDI B), it allows creators to sequence up to 32 independent instruments simultaneously across a single unit.The Composer ROM: The unit shipped stock with E-MU's 32MB "Composer" ROM chip. This collection comprises 1,173 raw instrument samples that generate 1,024 factory presets and 512 user-rewritable preset slots, spanning high-quality acoustic pianos, guitars, orchestral strings, world percussion, and classic analog synth emulation.Modular Synthesis Power: Though commonly used as a playback module, the Proteus 2000 contains a robust architecture where patches can be layered up to four instruments deep. It boasts 50 proprietary E-MU Z-Plane morphing filters and a virtual "PatchCord" modulation system capable of routing 24 sources (like LFOs and envelopes) to almost any internal destination

Tested and working. Supplied with a mains power cable. This unit has Rack Ears