Sequential Circuits Pro-One

Sequential Circuits Pro-One for sale.

This one's been sold but we have another available - email us.

Fully disassembled, cleaned inside and out, and meticulously serviced and reassembled. Working perfectly. This process was performed by an expert vintage synth tech and took nearly 12 hours. The end result is an instrument that's better than the rest and is priced accordingly. Ready to play, no excuses.

Tech notes: 

Replaced power cable.
Replaced molex connector terminals (2)
Replaced capacitors T2.2/25 x4
Repaired broken standoffs, which are very common in Pro-Ones - see additional screws in front panel.
Removed bender unit and wheels, replaced terminals. 
Opened, cleaned and lubed, reassembled. 
Cleaned all switches and pots for crackle free performance.
Installed new 16p IC socket. 
Recalibrated VCA offset, D/A scale for CV, VCOs, adjusted bender, checked mod wheel, cleaned jacks.
Burn in test. Multiple systematic tests over extended period of time.
Unit works perfectly and sounds great!

This Pro-1 left the factory with the later membrane style keyboard Sequential switched over to later on in their production run. We had our tech service this keyboard and its now working perfectly, but the keys on this type of mechanism are a bit harder to play due to the mechanism design, so we removed that keyboard and replaced it with a newly designed 3rd party keyboard that feels much better. We're selling the membrane keyboard separately, but we can probably swap them out again if you'd like the original keyboard instead (if we still have it). We don't recommend it though as the new keyboard is much more pleasant to play.

We replaced the wooden sides with brand new replicas made by a third party.

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The Sequential Pro-1 is a favorite of many vintage synth enthusiasts and popular electronic musicians. It is one of our favorites too because it packs lots of features in a relatively small, lightweight synth. Thanks to its impressive modulation section, its capable of generating much more interesting sounds than most other monosynths. Some say its sound is identical to that of the Prophet-5 but, with the additional sequencer and arpeggiator, as well as the flexible modulation section, we think this synth is a bit more interesting. It's definitely got more options than most moog synths as well. Not only can it make some incredible sounds, its also a terrific effects processor since theres an audio in which routes signals through the filter. 

MODULATION SECTION
Fil Env
Osc B
LFO
OSCILLATOR A SECTION
Frequency
Octave
Saw switch
Pulse switch
Pulse width
Sync/off switch
OSCILLATOR B SECTION
Frequency
Octave
Saw switch
Triangle switch
Pulse switch
Pulse width
Lo freq/ normal switch
Kybd/off switch
LFO/CLOCK SECTION
Frequency
Saw switch
Triangle switch
Pulse switch
SEQUENCER SECTION
Seq 1/off/Seq 2 switch
Record/play switch
ARPEGGIATE SECTION
Up/off/ "up/down" switch
MIXER SECTION
Osc A
Osc B
Noise/ext
GLIDE SECTION