Back in 1998, this rackmount powerhouse arrived as E-mu's bold evolution of their Proteus line, packing Z-plane filter modeling that let sound designers morph tones in ways no other ROMpler could match at the time.
At its core, it's a 32-voice polyphonic (upgradable to 64) sample-based digital synth module with 16MB expandable ROM, delivering 640 factory presets plus 256 user slots across 4 layers per patch. Each layer features independent Instruments with key/velocity zones, transpose, fine tuning, and a modular patch cord system routing 64 sources—like 2 LFOs (17 waveforms, MIDI-syncable), 3 envelopes, and real-time knobs—to 64 destinations for deep modulation. The standout is its 50 Z-plane multimode filters (low-pass, high-pass, formant, notch, and more), dynamically morphing over time, paired with dual stereo effects, a 16-channel arpeggiator with 200 patterns, and 16-part multitimbral operation. Physically, it's a sleek blue 2U rack unit with a backlit 2x24 LCD, 12 real-time knobs for quick edits, dedicated buttons for menus like preset select and master volume, plus 6 analog outs, stereo S/PDIF digital, 2 stereo audio returns, and full MIDI I/O.
Owners have long praised its filter flexibility and patch matrix for cinematic textures and evolving pads, though some note the menu-diving workflow feels dated without dedicated front-panel sliders. It's a vintage gem for anyone chasing that late-90s E-mu vibe in a studio rack.
