The Sequential Trigon-6 is a six-voice analog polysynth introduced in 2022 that brings three discrete VCOs and a ladder-filter architecture into the company’s modern knob-per-function 6-series format. At a glance, it looks like a sibling to the Prophet-6 and OB-6, but its musical role is different: this is Sequential’s attempt to revisit the dense, authoritative, three-oscillator analog voice associated with some of the most mythologized synth designs of the 1970s and early 1980s, then reshape it into a more compact, stable, performance-ready instrument.
Sound and character
The Trigon-6 sounds thick in a way that is immediately physical. It is not merely warm, and not merely vintage-flavored. Its center of gravity comes from the interaction of three oscillators per voice, a ladder filter with switchable 2-pole and 4-pole response, and the added push of drive and feedback. That combination gives it a tone that can move from smooth, rounded, and almost orchestral to biting, saturated, and overtly aggressive without feeling like it has crossed into a different instrument.
In practice, it excels at unison basses, forceful mono leads, heavy polyphonic brass, slow-moving pads, cinematic drones, and harmonically rich chord work. The extra oscillator gives stacked sounds more internal motion before modulation even begins. Detuning produces width quickly, while the filter can either keep things creamy and centered or sharpen the sound into something more feral. This is one reason the Trigon-6 is so often discussed in relation to classic Moog-style territory, yet the comparison is incomplete: it carries more of Sequential’s forward midrange presence, faster workflow, and modern studio discipline than a pure retro clone mentality would suggest.
Just as important is what it does not sound like. It is not a substitute Prophet-6 and it is not an OB-6 wearing darker clothes. The Prophet-6 has a more recognizably Sequential sheen, and the OB-6 has the airy SEM openness that makes its chords bloom in a very specific way. The Trigon-6 is denser, more muscular, and in many patches more vertical in its harmonic profile. It tends to push forward rather than spread outward, which makes it especially effective when a synth part needs to occupy real authority in a mix rather than simply decorate it.
Features and architecture
- Manufacturer: Sequential
- Year: 2022
- Production years: 2022 to present, with the instrument still appearing in current dealer listings and a desktop variant added in 2023
- Synthesis type: Analog subtractive synthesis
- Category: Polyphonic analog keyboard synthesizer
- Polyphony: 6 voices; Poly Chain allows two units to be linked for 12 voices
- Original price and current market price: Original launch pricing was around US$3,499 for the keyboard model; current new keyboard pricing still sits roughly in the US$3,390 to US$3,500 range, while the desktop version generally sits around US$2,499 to US$2,699
- Oscillators: 3 discrete VCOs per voice with simultaneously selectable triangle, sawtooth, reverse sawtooth, and variable-width pulse waves; hard sync between oscillators 1 and 2; oscillator 3 can operate in low-frequency mode
- Filter: Switchable 2-pole/4-pole discrete resonant low-pass ladder filter per voice, with drive, feedback, self-oscillation, and keyboard tracking options
- LFOs: 1 global LFO with sine, sawtooth, reverse sawtooth, square, and random waveforms; sync and audio-rate operation available
- Envelopes: 2 four-stage ADSR envelopes, one for filter and one for amplifier
- Modulation system: Poly Mod with oscillator 3 and filter envelope as sources, 7 main destinations, plus velocity and channel aftertouch routing
- Sequencer / arpeggiator: Polyphonic 64-step sequencer with rests; arpeggiator with up, down, up/down, random, and assign modes, plus octave and note-value options
- Effects: Dual 24-bit/48 kHz digital effects with reverb, delay, chorus, flanger, phase shifter, and ring modulator; separate stereo analog distortion; true bypass for the digital effects
- Memory: 500 factory programs and 500 user programs
- Keyboard: 49-key, full-size, semi-weighted Fatar keybed with velocity and aftertouch
- Inputs / outputs: Stereo 1/4-inch audio outputs, 1/4-inch headphone output, and four 1/4-inch pedal inputs
- MIDI / USB: MIDI In, Out, and Thru plus USB-B for bidirectional MIDI
- Display: Small integrated program/BPM display for patch and clock management
- Dimensions / weight: 31.8 x 12.7 x 4.6 inches; 20 lbs / 9.5 kg
- Power: Standard IEC power connection
Strengths
- The core tone is unusually substantial for a compact modern polysynth. Three oscillators per voice and the ladder filter give it immediate sonic mass without requiring menu work, layering, or external processing.
- Drive and feedback make the filter section more than a vintage gesture. They extend the instrument beyond polite retro imitation and give it a broader expressive range, from sweet analog body to abrasive, high-impact saturation.
- The interface is fast and musically honest. The 6-series layout remains one of Sequential’s best design decisions: immediate, tactile, and resistant to menu fatigue.
- It works equally well as a poly and as a disguised monosynth. In unison, the Trigon-6 becomes an 18-oscillator brute, which is a large part of why its basses and leads feel so commanding.
- Its performance tools are practical rather than ornamental. Aftertouch, sequencer, arpeggiator, live panel behavior, and strong clock integration make it usable in both studio and live settings.
- It occupies a distinct place inside Sequential’s lineup. Rather than cannibalizing the Prophet-6 or OB-6, it offers a third flavor with its own musical bias and personality.
Limitations
- Six voices can feel tight for sustained pads, complex chords, and layered performance playing. The sound is big, but the voice count remains conservative by current standards.
- The modulation architecture is expressive but not especially deep compared to more elaborate modern polysynths. It is intentionally streamlined, and some players will eventually hit its ceiling.
- The keyboard spans only four octaves. That keeps the instrument portable, but it also makes two-handed performance and larger split-style thinking less comfortable.
- The onboard keybed offers channel aftertouch, not polyphonic aftertouch from the keyboard itself. Expressive control is present, but not at the most advanced hardware level.
- Its price places it in a competitive bracket. For similar money, some buyers will find instruments offering more voices, deeper modulation, multitimbral operation, or larger keyboards.
- Its preset organization is less coherent than its panel design. The instrument rewards editing, but the factory browsing experience is not always the clearest entry point into what it does best.
Historical context
The Trigon-6 arrived in November 2022 under unusually charged circumstances. It was announced after the death of Dave Smith and described by Sequential as the last design to which he contributed. That fact alone ensured that the instrument would not be heard in neutral terms. It entered the market not simply as another product launch, but as a postscript to one of the central careers in synthesizer history.
Its timing also mattered for another reason. Sequential had already established the Prophet-6 and OB-6 as two major statements in its modern analog revival: one rooted in Prophet lineage, the other in the Oberheim SEM voice. What remained absent from that family was a dedicated three-oscillator ladder-filter poly with the same immediate interface philosophy. The Trigon-6 filled that gap. In doing so, it effectively completed a trio of modern Sequential flagships built around three different classic filter identities.
The broader market context was just as important. Musicians still wanted premium analog polysynths, but there was growing fatigue with either ultra-expensive flagships or nostalgic products that offered little beyond heritage branding. The Trigon-6 responded by aiming at a middle path: unmistakably premium, unmistakably analog, but compact, playable, and direct. It was not cheap, but it also did not ask users to navigate the complexity or size of the largest modern analog instruments.
Legacy and significance
What makes the Trigon-6 significant is not that it invented a new synthesis method. It did not. Its importance lies in translation. It translates a historically loaded sonic idea — the big three-oscillator ladder-filter poly synth — into a contemporary instrument that is reliable, portable, and immediate enough to become a working tool rather than a museum object or luxury fantasy.
That matters because a great deal of synth culture still revolves around inaccessible legends: instruments loved partly because they are rare, temperamental, expensive, or mythologized beyond practical use. The Trigon-6 does not destroy that mythology, but it does something more useful. It offers a serious modern answer to it. It asks what that sound becomes when it is placed inside Sequential’s mature industrial design language and given enough modern control to be stable on stage, fast in the studio, and broad enough to justify itself in current production environments.
It also matters as a statement about brand identity. Sequential did not make a Prophet derivative and call it new. Nor did it simply chase Moog nostalgia in a literal way. The company built an instrument that clearly references historic analog power, but still speaks with an accent that is recognizably its own. That is harder to do than releasing a faithful reissue, and it is one reason the Trigon-6 deserves to be seen as more than a memorial footnote.
Artists, users, and curiosities
Because the Trigon-6 is still a relatively recent instrument, its public identity is tied less to a long list of famous records than to the people who helped define its early sonic image. Public demonstrations from players such as Chris Calcutt and Mike Pensini were among the first to show that the instrument could move beyond predictable “big analog” presets into more nuanced territory, from cinematic textures to sharper, more animated sound design. That matters, because the Trigon-6 could easily have been reduced to a shorthand like “Sequential does Memorymoog,” and the better demos quickly showed that the instrument was broader than that.
Another revealing detail is the sound-design roster documented in the official manual. Programmers and artists including Robert Rich, Matia Simovich, Julian Pollack, Francis Preve, Lorenz Rhode, and others contributed factory sound design. That list is telling. It suggests that Sequential wanted the Trigon-6 to arrive not as a one-dimensional nostalgia machine, but as an instrument legible to ambient, cinematic, fusion, modern electronic, and performance-oriented players.
One of the most useful curiosities in the Trigon-6 story came in 2023, when Sequential released the desktop module and added MPE support. That update subtly changed the conversation around the instrument. Before then, many players saw it mainly as a compact premium analog poly with a specific vintage-flavored center. Afterward, it could also be understood as a more expressive platform, especially for users pairing it with external MPE-capable controllers. In other words, its identity widened after launch rather than narrowing.
Market value
- Current market position: The Trigon-6 sits firmly in the premium modern-analog segment, alongside other boutique-leaning professional polysynths rather than mass-market workstations or budget analogs.
- New price signal: The keyboard model still tends to sell new at roughly US$3,390 to US$3,500, while the desktop version commonly lands around US$2,499 to US$2,699.
- Used market signal: The used market is active but still somewhat young, with prices varying by region; examples often appear in the mid-US$2,000s, while broader price-guide ranges show that local asking prices can spread significantly.
- Availability: It remains obtainable through major retailers, and the desktop module broadens access for players who do not need another keyboard.
- Buyer notes: The main question is not whether it sounds good, but whether its specific sonic identity and interface are worth the premium over higher-voice-count alternatives.
- Support ecosystem: Official manuals, firmware downloads, and forum discussion remain easy to access, which helps long-term ownership.
- Ease of finding one: New units are still findable, and used units appear with enough regularity that patient buyers are not forced into panic purchases.
- Long-term position: It does not yet feel “undervalued,” but it also does not feel disposable. Its long-term standing looks stable, with a realistic chance of becoming one of the more respected modern Sequential instruments rather than merely a transitional release.
Conclusion
The Sequential Trigon-6 is not important because it is the biggest, deepest, or most feature-packed analog polysynth of its era. It is important because it distills a historically powerful sound into a form that musicians can actually live with: tactile, compact, stable, and musically immediate. It carries memorial weight because of Dave Smith’s final involvement, but its real achievement is that it does not need sentiment to justify itself.
In the end, the Trigon-6 matters because it turns a mythic analog idea into a practical modern instrument without sanding off the danger. It is a serious, characterful synth with real mass, real personality, and a clear place in Sequential’s modern history.