E-mu XK-6 Xtreme Keys

Back in 2001, this keyboard brought the raw, aggressive sounds of E-mu's Xtreme Lead-1 module to a full-sized playing surface, packing techno basses, buzzing leads, dance kits, and DJ scratches into a 32MB X-Lead ROM that you could expand up to 128MB with swappable cards.

Its 61 velocity-sensitive keys with monophonic aftertouch span a responsive action, paired with a control-heavy front panel: 2x24 LCD display, 5 tweakable knobs, an encoder, 38 buttons including 16 mute/enable switches for live layering, plus pitch/mod wheels and 16 real-time controllers. Under the hood, 64-voice polyphony drives sample-based synthesis with 50 Z-plane multimode resonant filters, 3 envelopes, 2 LFOs, and a deep mod matrix, all enhanced by a 24-bit dual stereo effects engine offering 29 reverbs, 15 delays, and more. SuperBEATS groove mode delivers 1024 sliced patterns with fills and user programming across 16 tracks, while 16 syncable arpeggiators and a sequencer keep rhythms locked from 25-300 BPM; connectivity includes 4 audio outs, front headphone jack, full MIDI DIN, and 2 footswitch ports, all in a sturdy 9.5kg frame.

Over two decades on, players still dig its thick, characterful tones—especially those evolving synth leads and pads—for adding grit to electronic tracks, though some note the menu-diving edits and lack of USB as vintage quirks that reward dedicated knob-twiddlers.