The Ensoniq DP/4 is a rack-mounted digital multi-effects processor. It uses four 24-bit DSPs to process four signals in parallel. Input gain is adjustable for saturation. Effects are intentionally non-realistic. Transformer noise occurs when idle. Front-panel editing is cumbersome. MIDI control via MIDIQuest is unreliable. The manual is unusable. An internal battery is user-replaceable.
The Ensoniq Mirage is an 8-bit sampling keyboard introduced in late 1984 as Ensoniq's first product. It offered eight-voice polyphony, analog Curtis CEM3328 filtering, and wavetable synthesis via alternative OS. It booted and stored data on a built-in 3.5-inch floppy drive — one of the first consumer uses of that format. Priced at $1695, it sold 8,000 units in its first year, undercutting the Fairlight CMI and E-MU Emulator.
The SQ-80 is a digital/analog synthesizer introduced in 1987 and manufactured until 1989. It features Polypressure Keyboard technology, 43 additional waveforms (including five drumkits), an enhanced sequencer, a floppy disk drive, MIDI in/out/thru, and the 2nd Release reverb simulation. Its OS was later back-ported to the ESQ-1. It was promoted professionally alongside the EPS sampler, including in a limited-edition CD with the Dixie Dregs.
The Ensoniq ASR-10 is a 1992 sampling keyboard designed for live performance and self-contained music production. It integrates sampling, synthesis, sequencing, and effects in one unit. It loads samples while playing. It layers up to eight samples per instrument. It modulates them with envelopes, filters, LFOs, and real-time controls. It sequences with 16 tracks at 96 PPQN. It applies up to 62 effects — including vocoder and distortion — and resamples with them. It records to SCSI hard drives or proprietary 3.5-inch floppies. Its SCSI implementation rejects many common drives unless specially flashed. It ships in keyboard, weighted (ASR-88), and rackmount (ASR-10R) versions. It is the third-generation EPS-series sampler. It runs at 16-bit, 29.7619 kHz or 44.1 kHz. It ships with 2MB RAM, expandable to 16MB.
The Ensoniq EPS is a 13-bit sampling keyboard introduced in 1988 as the Mirage's successor. It uses dual processors and a dedicated sound engine to enable load-while-play. It reads double-density 3.5" floppies formatted to 800k. It integrates MIDI for control or computer connection. Early units suffered mechanical issues with their polypressure keyboard.
The EPS-16 Plus is a purpose-built 1990 sampler that trades flexibility for immediacy. It records mono, plays back 16-bit samples at seven fixed rates, and routes everything through stereo panning and 13 effects. Its ES5505 OTIS chip gives it tight, responsive playback—but no sample rate conversion, no stereo input, and no non-destructive editing. Turbo versions added flash and SCSI, but Ensoniq replaced it with the ASR-10 in 1992. It belongs in a room where decisions are made by ear and fingers—not by menu diving.
The ESQ-1 is a hybrid digital-analog workstation that prioritises immediacy and integration over depth or durability.
The Ensoniq Fizmo is a 1998 digital synthesizer using Transwave synthesis, capable of 48-voice polyphony, featuring real-time F-I-Z-M-O knob modulation, multi-segment envelopes, and a focus on evolving pads and arpeggiation — though hampered by hardware and UI limitations.
The Ensoniq VFX is a performance-type synthesizer released in 1989. It employs Transwave Wavetable Synthesis, Sample playback and Subtractive Synthesis. It has 21-voice polyphony. It features Poly-Key Pressure (Polyphonic Aftertouch). It allows combining up to three voices into a preset for live performance. It includes the Ensoniq Signal Processing (ESP) chip for 24-bit effects. A single sound can contain up to six oscillators. It integrates synthesis, effects and sequencing into a single-unit digital studio. It delivers terrific acoustic sounds and innovative performance and sequencing features.