This website is reader supported. When you purchase items on eBay through the links on this site, we may earn an affiliate commission at no cost to you. Read our Privacy Policy for info.

Sequential Circuits Pro One

“Sequential Circuits Pro One. Needs a good home. Condition is Used. This is a very special synth and is in full working condition with a few minor cosmetic flaws.There are so many things that make this synth special. These two Curtis 3340 VCOs (that so many modern analogue synthesizers have tried to replicate) allow for thicker bass notes and richer, more colorful, piano like Mids. The modulation matrix is capable of adding even more to the Pro One’s sound including countless timbral possibilities through FM synthesis, up to two LFOs, and a filter envelope that can also modulate pulse width and oscillator frequency as well. The Pro One also has an additional VCA envelope, and both envelopes have a re-trigger mode. Oscillator B can serve as an LFO or audio rate modulation source, and can generate frequencies independent of the keyboard. It has a sequencer and arpeggiator as well. The serial number for this unit is right in the sweet spot where Pro Ones had good power supplies and keys. That said even the better of the two key beds will need to be occasionally serviced. These keys have recently been serviced and none stick currently. They will begin to stick over time though, and the key bed will need to be routinely cleaned. The keys are just a bit stiff, as is the nature of all Pro Ones.” Click here to search for synths on eBay