Sequential Circuits Pro One

Sequential Pro One Image

The Sequential Pro One is a wicked little monosynth! It comes from the same period and genre as the Roland SH-101 and Moog Prodigy. The Pro One was basically Sequential's attempt at taking their legendary Prophet 5 poly-synth and packing it into a compact, inexpensive, monophonic analog synth! It has two VCOs, a great 4-pole lowpass filter, two ADSR envelopes (one for filter), and a compact three-octave keyboard. With a Pro-One, you can easily create punchy analog bass-lines and leads or quirky analog synth effects.

The Pro One is an extremely flexible synth with lots of modulation possibilities (ie: the filter, VCO B and LFO can modulate VCO A or B frequencies or pulse widths, or the VCF). There's also an onboard sequencer, something common on many Sequential synths but not often found on other monosynths of the time. It is very basic, however, storing only two patterns and up to 40 notes max. Also, only pitch info is recorded (and in step time only); you can not assign a note duration to any notes. So it's basically a short melodic sketch-pad...but useful. Also onboard is an arpeggiator which has UP and UP/DOWN patterns.

Sequential Pro One Image

The Pro One is relatively simple and intuitive to use, fun, educational and responsible for some of the coolest and hardest basslines in electronic music today! It is used by Hardfloor, Überzone, the Prodigy, Cirrus, Fluke, Depeche Mode, Download, Banco De Gaia, Vince Clarke, New Order, Freddy Fresh, Mouse on Mars, Prince, Soft Cell, Richard Barbieri and Sigue Sigue Sputnik.

But since you can't always find one (about 10,000 were produced), or one that works properly... Wine Country Sequential has come up with a solution! WCS has been servicing old Sequential gear for years, as well as selling repair parts, etc. They have developed the Pro One Software Synthesizer Plug-In, an awesome replica of the original Pro One, both in look and sound! It has some added features and is an incredible way to easily add the sound of the Pro One to your music!

Check Sequential Circuits Pro One Prices on eBay

The link above will take you to a search for this synth to see active listings with more images, specs and information. If you don't find it there, try looking in our forum marketplace. Our marketplace gets thousands of visits every week so make sure to check back often if you want to buy or sell a synth.

Related forum topics

Comments

Are you looking to buy or sell a Sequential Circuits Pro One? Post an ad in Gear For Sale or a request in Gear Wanted. For spare parts and repair services check out Gear Services & Other Goods. Our forums also has a Buyer’s Guide section where you can ask for advice on buying synthesizers.

68 Visitor comments
Robert
May 29, 2012 @ 9:17 am
I bought my Pro One around the time the DX7 came out, nobody wanted these little babies and got it at a great price. I've heard many complaints about the keyboard action, the keys do get wobbly and uneven mainly due to the rubber bushings that dry up and crumble away. Recently, I ordered a new set of bushing and replaced them myself and it is just amazing what a difference it makes...I really encourage anyone with a Pro One to get these bushing replacements...I got mine here: http://home.netcom.com/~arcsound/ It really feels and plays like a brand new machine!
P tech
April 27, 2012 @ 11:33 pm
Hi, Just been checking out the going rate for this beauty mint in the UK. Anything up to around £1300! Got mine for £500 four years ago! I'll never sell. Every time you play this instrument, you find a new sound and go to new places. Not the best build quality but the sound makes up for that. Check out the solo in Howard Jones's "What is love". Fine example of the PRO1's sound. Good vid demo on this page to. Cheers.
Connor
April 24, 2012 @ 5:50 am
Also used by KMFDM and Fad Gadget
Ryan
March 5, 2012 @ 12:01 am
The output on the Pro-One is supposed to double as a headphone jack. So it should put out a dual mono signal if a stereo cable is used. When I used stereo headphones with it I got sound in both L and R speakers although the output level was a bit weak.
Mellotron
February 15, 2012 @ 4:12 am
Stereo?!?!? No, the Pro-One is gloriously mono!
 
Post Comment!
VSE Rating

Awesome!

User Rating

Rated 4.45 (874 Votes)

  • Check Prices on eBay
  • The link above will take you to a search for this synth to see active listings. If you don't find it there, try looking in our forum marketplace or post a wanted classified.
  • Specifications
  • Polyphony - Monophonic
  • Oscillators - 2 VCOs (CEM-3340 chips): : VCO A saw/pulse, VCO B saw/tri/pulse, Noise
  • LFO - saw, tri, pulse
  • Filter - CEM-3320 Filter chips: 4-pole lowpass with Cutoff, Resonance, ADSR Envelope, Keyboard Tracking
  • VCA - ADSR Env
  • Keyboard - 36 keys
  • Arpeg/Seq - Arepg: UP, UP/DOWN patterns, Latch mode; SEQUENCER: 2 patterns of pitch info only, 40 note capacity.
  • Control - CV/GATE
  • Date Produced - 1981 - 1984

Errors or Corrections? Send them here.