Sequential is a legendary American synthesizer manufacturer founded by Dave Smith, known for creating the iconic Prophet-5 and pioneering MIDI technology.
Sequential is a premier electronic musical instrument manufacturer founded by the legendary designer and Grammy winner Dave Smith. Originally established as Sequential Circuits in 1974, the company revolutionized the music industry in 1977 with the launch of the Prophet-5, the world’s first fully programmable polyphonic synthesizer.
Today, Sequential continues to design and manufacture high-end analog and hybrid synthesizers in San Francisco, widely used by professional musicians and producers around the globe. Their lineup includes modern classics like the Prophet-6, OB-6, and Prophet X. The company is dedicated to maintaining the legacy of innovation famously associated with the Sequential name.
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Operating system updates and installation instructions for current instruments are available on the Support page of the official Sequential website.
You can contact support via email at mail@sequential.com or by using the support ticket form on the Sequential website. Phone support is also available at (415) 830-6393.
Sequential synthesizers are designed and assembled in San Francisco, California.
While Sequential focuses on their modern product line, their support page often provides resources or links for legacy instrument documentation where possible.