description Oberheim OB-Xa Overview
The Oberheim OB-Xa is a polyphonic analog synthesizer released in 1981 by Oberheim Electronics. It’s notable for its rich, complex sound generated through discrete transistor circuitry which offered a unique warmth and depth compared to contemporary digital synths. Musicians seeking powerful, evolving textures – particularly those in genres like rock, pop, and electronic music – utilized the OB-Xa extensively during the 80s, influencing countless recordings.
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Oberheim OB-Xa ranks #32 of 150 in the Icon ranking, behind Shelby Cobra 427, ahead of Rollei Rolleiflex 2.8F.
help Oberheim OB-Xa FAQ
How many voices of polyphony does the Oberheim OB-Xa have?
The Oberheim OB-Xa is a polyphonic synthesizer available in configurations ranging from 4 to 8 voices, depending on the number of installed voice cards. This allowed musicians to play complex, multi-note chords, a major feature for analog synths in 1981. The ability to stack these voices created incredibly massive, thick sounds.
What are the main synthesis features of the Oberheim OB-Xa?
Unlike its predecessor which used discrete circuitry, the OB-Xa utilized highly reliable CEM (Curtis Electromusic Specialties) filter and amplifier chips. It famously featured a two-pole state-variable filter, allowing users to easily switch between low-pass, high-pass, and band-pass modes. This architecture gave it a uniquely sharp, aggressive analog sound.
Which famous musicians used the Oberheim OB-Xa on hit records?
The OB-Xa was a defining sound of 1980s pop, famously used by artists like Prince, Stevie Wonder, and Van Halen. Its heavy, rich synthesizer tones are heavily featured on tracks like Van Halen's "Jump" and Prince's "When Doves Cry." It became a staple in high-end recording studios worldwide.
What electronic components differentiate the Oberheim OB-Xa from earlier synths?
Unlike the original OB-X which used discrete circuitry, the OB-Xa utilized CEM (Curtis Electromusic Specialties) chips for its filters and amplifiers. It also introduced the signature page-based menu system for programming parameters. These components gave it a more reliable, sharp sound that defined 80s pop.
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