Cruise
A hybrid Italian analog synthesizer combining a polyphonic orchestral string section with a monophonic synthesizer in a single splittable 49-key instrument, also marketed by Sequential Circuits as the Fugue.
Siel
8 products
Synthesizer
DK600
The DK600 is an Italian programmable polysynth from the mid-1980s, also marketed as the Opera-6 in the UK. It features six voices with dual oscillators per voice (12 total DCOs), giving it a thicker sound than contemporary single-oscillator competitors like the Roland Juno-106 and Korg Poly-61. The instrument combines digitally controlled oscillators with analog filter circuitry and includes full MIDI implementation.
DK70
The DK70 is a fully programmable, battery-powered portable synthesizer featuring subtractive synthesis using DCO, VCF, and VCA technology, similar to Roland's Alpha Juno series. It excels at string sounds, pads, bass, and strange noises, with warmer and more analog qualities from its VCF and VCA sections compared to similarly designed competitors. It is an underrated synth targeted at live performers, though editing sounds is tedious due to limited front-panel controls.
DK700
The SIEL DK700 is a six-voice polyphonic analog synthesizer and an evolution of the Opera 6 with added MIDI functionality. It features dual digitally controlled oscillators per voice, six independent 24 dB/octave low-pass filters with resonance, and three LFOs for comprehensive sound design. Considered one of the best and rarest synthesizers SIEL ever produced, it delivers a fat, versatile analog tone.
DK80
The SIEL DK-80 is a 12-voice polyphonic analog synthesizer with digital control from 1985, bridging the gap between low-end mid-1980s Roland and Sequential instruments. It features bi-timbral capability with a split keyboard mode, essentially offering two polysynths in one 61-key velocity-sensitive instrument. Additional features include a 2-track realtime sequencer, chord memory, hold functions, and programmable stereo panning with sweeping effects.
Mono
The Siel Mono is an Italian analog monophonic synthesizer released in 1980 that combines preset and subtractive synthesis capabilities. It features a single DCO with a slider-based interface offering both ten orchestral presets and a free mode for basic waveform programming. Despite its simple architecture, the instrument is noted for its warm sonic character and ease of use.
Opera 6
The Opera 6 is a classic early 1980s Italian analog 6-voice polyphonic synthesizer that competed with the Roland Juno series. It features two oscillators per voice, three LFOs for extensive modulation, and a 61-key velocity-sensitive keyboard. Later versions added DCOs for improved tuning stability and MIDI support.
Keyboard
Orchestra
The Siel Orchestra is a fully polyphonic four-section analog keyboard from the late 1970s, offering brass, strings, organ, and piano timbres that can be layered in pairs. Later rebranded as the ARP Quartet, it became a go-to instrument for lush analog string and brass textures in both studio and live settings.