The Prophet-10 is two Prophet-5s stacked into one instrument. It delivers ten-voice analog thickness no other 1980 synth matches. But it overheats, detunes, and demands physical and technical concessions. Version 3 fixes stability with CEM chips — at the cost of low-end weight.
The Prophet-600 is a 1982 6-voice analogue synth. It introduced MIDI to commercial instruments. It gives players two oscillators per voice with sync, variable pulse, and triangle/saw waveforms. Its VCF, VCA, and Poly-Mod come from the Prophet-5. It includes an arpeggiator and 2-track sequencer. It glides. It modulates flexibly. It does not track reliably over time. It has no velocity or aftertouch. It is not expandable. It belongs in rooms where history and immediacy matter more than precision.
The Prophet-T8 is an 8-voice analog polysynth released by Sequential Circuits in 1983. It features digital control of analog sound, a 76-key weighted keyboard with velocity and aftertouch, full MIDI implementation, split/layer/double/unison modes, and a real-time sequencer. Its tone resembles the Prophet-5. It was Sequential’s finest analog synthesizer—but faced commercial pressure from the Yamaha DX7.
The Sequential Circuits TOM is a 1985 drum machine that treats eight digitally recorded drum sounds as raw material—not fixed instruments, but malleable elements. It excels at per-voice tuning, layering, reversal, and spatial placement. It falls short on sonic range, documentation, and acoustic verisimilitude. It belongs in the studio of someone who composes with constraints, not presets.
The Six-Trak is a six-voice analogue synthesizer released by Sequential Circuits in January 1984. It was built as an inexpensive, portable 'scratch-pad' for trying out arrangements.
The Drumtraks is a 1984 sample-based drum machine by Sequential Circuits. It was the company’s first drum machine and first sample-based product. It featured early MIDI implementation, ROM-swappable sounds, velocity-sensitive MIDI input, and flexible synchronization with both MIDI and legacy gear.
The Prophet 2000 is Sequential Circuits’ first sampler — released in 1985. It uses 12-bit sampling at up to 41.667 kHz, with 256 kilowords of memory. It offers 8-voice polyphony and early multitimbral operation via MIDI channels. Its analog VCFs and VCAs give it warmth absent in later samplers. It was relatively affordable at £2,000.
The Prophet-5 is an analog synthesizer manufactured by Sequential Circuits. It was designed by Dave Smith and John Bowen in 1977. It was the first polyphonic synthesizer with fully programmable memory. Before the Prophet-5, synthesizers required users to adjust controls to change sounds, with no guarantee of exactly recreating a sound. Sequential used microprocessors to allow users to recall sounds instantly rather than having to recreate them manually. The Prophet-5 facilitated a move from synthesizers creating unpredictable sounds to producing "a standard package of familiar sounds". Initially, Smith and Bowen developed the Prophet-10, a synthesizer with ten voices of polyphony, meaning it could play up to ten notes simultaneously. Smith and Bowen removed half the electronics, reducing the voices to five and creating the Prophet-5. In 1978, Sequential released the Prophet-5, the first programmable polyphonic synthesizer, which was widely used in the music industry. Whereas previous synthesizers required users to adjust cables and knobs to change sounds, with no guarantee of exactly recreating a sound, the Prophet-5 used microprocessors to store sounds in patch memory.
The Prophet VS is an 8-voice hybrid synthesizer released in 1986 by Sequential Circuits. It introduced vector synthesis using a diamond-pattern joystick to mix four 12-bit digital single-cycle waveforms per voice, which are then processed through analog CEM3379/3389 chips. Waves 0–31 are user-editable via MIDI sample dump or onboard harmonic mixing; waves 32–126 are fixed in firmware. It does vector morphing better than anything else of its era—but offers no velocity sensitivity, no aftertouch, no effects, and no reliable patch backup.