“here im selling a pro one
cosmetically its in very good condition with only the smallest of marks see pics
it has been rebushed and serviced by kent of ksr and is in fully working order
amazing possibilities very deep synth and hard to find in this condition ” Link

” Recently refurbished vintage Pro One, with service receipt. Original owner. Great condition, wonderful instrument used on many of the above Gold & Platinum records. Can be modified for midi. Gorgeous analog oscillators – try getting these sounds out of a plug-in…not ‘gonna happen!” Link

Pro One, Sequential Circuits @ 11 May 2017, Comments Off on Sequential Circuits Pro One

sci_pro_one_syntth “Location: Barnet, North London
Asking price is £1790 as these rarely come up for sale, open to sensible offers.
Pay on collection, you can collect or delivery is free in the U.K. can ship overseas on cleared funds at cost to the buyer.

Lovely and well cared for example of the Pro-One synth. Bought this over 12 years ago from well know synth supplier RL MUSIC (look them up on google) and it’s recently been serviced and inspected by their team at KSR in London.

I don’t use this much anymore, fully digital these days, so would like to give it to a good home, it’s had studio use only and in excellent condition, the wood panels look great with some small marks to them but overall this synth looks fantastic and more importantly sounds fantastic.

I’m quite sure I have the original manual in storage which I will locate for the buyer but cannot promise I’ll find it.

This synth is also a great investment piece and will only increase in value over time.

Thank you” Link

Pro One, Sequential Circuits @ 11 May 2017, Comments Off on Sequential Circuits Pro One

“For sale is this Prophet 600 Synth from Sequential Circuits. It has been fitted with the coveted GiiGli upgrade and has full midi integration. This synth is in very very good cond. Stunning. Bought for a particular project its time for it to move on.” Link

Pro One, Sequential Circuits @ 11 May 2017, Comments Off on Sequential Circuits Pro One

” Up for auction my Sequential circuits pro one, a 2VCO monophonic synth from the early 80’s. The overall condition is good for an instrument of it’s age, and it sounds great! Although I am prepared to post this if absolutely necessary, I would far prefer any buyer to collect this instrument in person, due to the value, age, and fragility of classic instruments. Happy bidding!” Link

Pro One, Sequential Circuits @ 11 May 2017, Comments Off on Sequential Circuits Pro One

“Sequential Circuits Pro One [analog synthesizer]
[j-wire model, serial #7764]
(serviced by Wine Country Sequential)
(works perfectly, excellent condition)
(with orig. power cord intact)
Includes:
*orig. manual
*WCS service invoice
*(1) extra pitch wheel
*(1) extra mod wheel) ” Link

Pro One, Sequential Circuits @ 27 April 2017, Comments Off on Sequential Circuits Pro One

usedproone “This is as close to a cosmetically mint Pro One that I have seen. I have owned this synth for 7 years. It came with the J-wire board which is great. However I mostly sequenced it with a hardware sequencer. I just spent $300 to have it fully gone through at Perfect Circuit Audio here in Los Angeles. It sounds dreamy. I am selling in order to buy a OB-6. I’ll miss this synth but I need a poly. ” Link

Pro One, Sequential Circuits @ 20 April 2017, Comments Off on Sequential Circuits Pro One

pro_one “Sequential Circuits Pro One [analog synthesizer]
[j-wire model, serial #7764]
(serviced by Wine Country Sequential)
(works perfectly, excellent condition)
(with orig. power cord intact)
Includes:
*orig. manual
*WCS service invoice
*(1) extra pitch wheel
*(1) extra mod wheel) ” Link

Pro One, Sequential Circuits @ 13 April 2017, Comments Off on Sequential Circuits Pro One

pro_one “Sequential Circuits Pro One [analog synthesizer]
[j-wire model, serial #7764]
(serviced by Wine Country Sequential)
(works perfectly, excellent condition)
(with orig. power cord intact)
Includes:
*orig. manual
*WCS service invoice
*(1) extra pitch wheel
*(1) extra mod wheel)” Link

Pro One, Sequential Circuits @ 30 March 2017, Comments Off on Sequential Circuits Pro One

sci pro _one “This is an original Pro One with a 37-note J-wire style keyboard. I have installed new Pratt & Read rubber bushings for the keys, and have kept this synth stored in my closet for the past 12 years. I also recapped the power supply and reflowed all the solder joints when I acquired the keyboard for my personal home studio. The previous owner drilled two holes in the case (see photos) for reasons I never understood. It never really bothered me, but could be a perfect location for MIDI in/out should you choose to go down that path.

I have just tested all keys, knobs, switches and both pitch wheels with my headphones, and all work great! Also included are the original operating and technical manuals. Both have been written in (original owner again), but are otherwise in fine shape.” Link

Pro One, Sequential Circuits @ 30 March 2017, Comments Off on Sequential Circuits Pro One

sci_pro_one “Sequential Circuits Pro One [analog synthesizer]
[j-wire model, serial #7764]
(serviced by Wine Country Sequential)
(works perfectly, excellent condition)
(with orig. power cord intact)
Includes:
*orig. manual
*WCS service invoice
*(1) extra pitch wheel
*(1) extra mod wheel)”
Link

Pro One, Sequential Circuits @ 16 March 2017, Comments Off on Sequential Circuits Pro One

sci pro one “Excellent condition. J Wite edition. Recently professionally calibrated. All knobs, keys, switches work perfectly. Selling with the Kenton Pro Solo ii CV to MIDI converter. Due to the age of the instrument, it is being sold as is. ”
Link

Pro One, Sequential Circuits @ 09 February 2017, Comments Off on Sequential Circuits Pro One

usedpro_opne “For sale is my Sequential Circuits Pro One vintage analog synthesizer. This has the more desirable J-wire keyboard (serial number #100-3142). It’s in nice shape and working great. The only thing not working is the Noise knob in the mixer section. Everythign else is working, but in general it could use a servicing/tune-up. All the keys do trigger currently but the keyboard is clacky, so a rebushing would make it play smoothly. Some of the switches are dirty and knobs are scratchy. Otherwise it looks to be working as it should, and has a great sound. The Pro One is almost like a monophonic Prophet 5 but with a few extra features like the sequencer, arpeggiator and mod section.” Link

Pro One, Sequential Circuits @ 02 February 2017, Comments Off on Sequential Circuits Pro One

up1 “Selling my beloved Sequential Circuits Pro One to free up room in my studio. The synth has been recently tuned by a reputable technician. Due to the nature of vintage instruments, the synth is sold as-is, no returns accepted.

Issues:
1. This unit features the membrane keyboard (this is not a J-Wire model). These keyboards all trigger pretty unreliably, so I recommend you play the synth via CV/Gate.
2. The key bushings need to be replaced. I have a new set I will include with the synth (pretty simple procedure to replace them). Doesn’t make a difference if you’re playing over CV/Gate due to the issues with the membrane keyboard, however.
3. Tuning is a bit flat when playing via CV (but tracks correctly across the full range). Not really a problem per se, just adjust the osc tuning accordingly.” Link

Pro One, Sequential Circuits @ 02 February 2017, Comments Off on Sequential Circuits Pro One

sci_pro_one “This J-wire Pro One was serviced on 11-30-16 by Greg Montalbano via Music Technologies Group.

Routine service included pots, switches and key contacts cleaned, bypass caps were replaced, and the synth was tuned & scaled. Furthermore an IEC Power Connector was installed, Key Bushings were replaced, and the MTG MIDI Mod was installed (Midi In, Out and Thru)!

The serial number is 4566.” Link

Pro One, Sequential Circuits @ 26 January 2017, Comments Off on Sequential Circuits Pro One

por-one “This Pro One is one of the first 1000 made(677). It is in VG cosmetic condition and sounds outstanding. The outputs and potentiometers are static free and turn smoothly.

One key has lost its bushing and sits a little higher in the key-bed than the others. It is a little loose upon being struck and wiggles a tad. The key does still work. The bushing costs a few bucks at Wine Country.

Owners manual and Service manual are included in a binder.

I have described this item to the best of my ability and therefore cannot offer returns on this item.” Link

Pro One, Sequential Circuits @ 19 January 2017, Comments Off on Sequential Circuits Pro One

sciproone ” This Sequential Circuits Pro-One is in amazing condition and fully functional, and is Midi-Capable via INCLUDED Vesta Kozo Midi-CV converter. It is a fully and professionally restored Late-Model with fully-functioning Keyboard. This is all-original, with NO modified circuitry or re-soldered components. All rotary pots and switches have been professionally cleaned. All key contacts on this later non-J-wire model have been restored and functioning. Everything works and sounds great. While no vintage synth is ever “truly” mint or perfect, this one has been well cared for and not cosmetically re-finished. Incredibly clean unit inside and out. Original Power cord (does not use AC wall adapter).” Link

Pro One, Sequential Circuits @ 19 January 2017, Comments Off on Sequential Circuits Pro One

p1 “Ich gabauf meine Tonstudio zu tun !Die Synthesizer ist wie neu. Benutzt in einem nicht raucher Recording Studio”
Link

Pro One, Sequential Circuits @ 19 January 2017, Comments Off on Sequential Circuits Pro One

pro1 “This Pro One is one of the first 1000 made. It is in VG cosmetic condition and sounds outstanding. The output and potentiometers are static free and turn smoothly.

One key has lost its bushing and sits a little higher in the key-bed than the others. It is a little loose upon being struck and wiggles a tad, however, it does still trigger and work fine. I never found the need to fix the key because of how little I played it and the way I played it. The bushing is a few bucks at Wine Country.

Owners manual and Service manual are included in a binder.” Link

Pro One, Sequential Circuits @ 12 January 2017, Comments Off on Sequential Circuits Pro One

sci1 “Sequential Circuits Pro One Synthesizer Model 100. 26 inch by 16 inch spare or repair. No external damage { Postage to UK ONLY} . Case included but the foam inside it is perished.” Link

Pro One, Sequential Circuits @ 12 January 2017, Comments Off on Sequential Circuits Pro One

1 “This is the original Sequential Circuits Pro One, serial #5510, with the preferred J-wire key action. All the knobs and switches have been de-oxidized and run as smooth as silk. Each key’s J-wire connections have also been carefully cleaned and de-oxidized and work perfectly. There is on key, the second C key from the bottom, that is still a little scratchy if the key is released slowly, but works perfectly in normal playing conditions. The orginal key bushings have all been cleaned and all the keys are even.

This comes with, and will be shipped in, a perfectly fitting Pelican 1650 case with wheels and is perfect for storing the insturments or taking it out on gigs. I purchased this instrument in 1993 and am the second owner. Since then it has been in my smoke-free studio or in temperature controlled storage. I have just given it a thorough cleaning and it works and sounds totally great.

As with all of these vintage Pro Ones, there are a good number of ways to interface it with other analog voltage controlled devices, including all the modern modular Eurorack gear (with a simple 1/4’ to 1/8” adaptor). There is basic CV in and out, gate out, gate/clock in, and filter CV in. There is also an audio in plug so you can send external audio through the Pro One’s great sounding filter. As I’m sure you know since you are here, this is a monophonic instrument but it does have a very cool appreciator and a very basic, but still cool, two position sequencer. This is basically the (one voice) little brother of the Prophet 5. (Thus the “Pro One” name.)” Link

Pro One, Sequential Circuits @ 29 December 2016, Comments Off on Sequential Circuits Pro One

p1 ” I really hate to sell such a cherished musical instrument; None the less, I’m not using it and can’t see a vision of when I will. The time has finally come when more important things/people are needing my concern.

This Pro One is one of the first 1000 made. It is in excellent cosmetic condition and sounds outstanding. The output and potentiometers are static free and turn smoothly.

One key has lost its bushing and sits a little higher in the key-bed than the others. It is a little loose upon being struck, however, it does still trigger and work fine. I never found the need to fix the key because of how little I played it, and the way I played it. If someone wanted to open it up and fix it I’m sure it’s not too difficult. The bushing is a few bucks at Wine Country. ” Link

Pro One, Sequential Circuits @ 29 December 2016, Comments Off on Sequential Circuits Pro One

pro_one “Great synth in good condition for its age. Some potentiometers needs replacing and a just overall tuneup. Far left key needs replacing. This is j wire model. ” Link

Pro One, Sequential Circuits @ 15 December 2016, Comments Off on Sequential Circuits Pro One

pro “Parting ways with another one of my favorite pieces of gear, my Sequential Circuits Pro-One. It was purchased at Dr Sound in NYC in 98 after a full servicing. It also had a mod & pitch wheel modification (replaced with knobs). I just opened it up and cleaned her out. She is in perfect working order. All keys work, sequencer etc. Entire machine was blown out with pressurized air, keys were cleaned. J-bar and bus bar cleaned and even touched up the wood with a light application of Murphy’s. ” Link

Pro One, Sequential Circuits @ 15 December 2016, Comments Off on Sequential Circuits Pro One

p1 “This is an original Pro One with a 37-note J-wire style keyboard. I have installed new Pratt & Read rubber bushings for the keys, and have kept this synth stored in my closet for the past 12 years. I also recapped the power supply and reflowed all the solder joints when I acquired the keyboard for my personal home studio. The previous owner drilled two holes in the case (see photos) for reasons I never understood. It never really bothered me, but could be a perfect location for MIDI in/out should you choose to go down that path.

I have just tested all keys, knobs, switches and both pitch wheels with my headphones, and all work great! Also included are the original operating and technical manuals. Both have been written in (original owner again), but are otherwise in fine shape.” Link

Pro One, Sequential Circuits @ 15 December 2016, Comments Off on Sequential Circuits Pro One

usedscip31 “This vintage synth is in great condition, beautiful walnut end panels, plays well and is ready for new studio or home after 35 yrs. of being mostly stored in its hardshell case. New power cable installed recently. Some notable imperfections are high/e key scratch and scrapes on bottom (see photos). Includes case and original owners manual. ” Link

Pro One, Sequential Circuits @ 08 December 2016, Comments Off on Sequential Circuits Pro One

pro_one “For sale is my SCI Pro One synthesizer. This is a rare synth going up in value all the time…that’s because it sounds awesome! Huge bass, leads, effects, with cool cross mod section that only a Pro One has. Similar to the P5 but has it’s own unique sound. This Pro One is fully functional & in excellent cosmetic condition for it’s age, J-wire keyboard and has the MTG Turbo CPU & MIDI retrofit fitted which turns it into a beast and integrates perfectly with any computer / midi based set-up. Really nice clean shape on the front, overall quite clean. Don’t miss out on this monophonic analog classic!” Link

Pro One, Sequential Circuits @ 08 December 2016, Comments Off on Sequential Circuits Pro One

sci_pro_one “This vintage synth is in great condition, plays well and is ready for new studio or home after 35 yrs. of being mostly stored in its hardshell case. New power cable installed recently. Includes case and original owners manual.” Link

Pro One, Sequential Circuits @ 08 December 2016, Comments Off on Sequential Circuits Pro One

sci_pro_1 “Background on the product: It was purchased new by a Jr. High school in the 90’s for use as a bass unit for the band. It came to our tech shop shortly after with a damaged membrane keyboard and split wood sides due to a basketball landing on the keyboard. Parts were too costly at the time so the unit was scrapped and sat on a shelf for the last 20 years. I recently decided to bring it to life so here is what has been done:
A retro fitted J-wire keyboard taken from a sound chaser 90’s music system (pratt and reed J wire) with all new bushings and an original PCB from a pro one hand wired and soldered into place to maintain DIP socket connectivity from a ribbon cable. New plastic bushing and repair on AC cord. New fuse system. New Black Walnut Wood sides with 4 coats of urethane. New noise generator (hand picked from a bucket of them for the noisiest one). New Logo badges. lightly sanded and re painted bottom, and VCO calibration. It cosmetically looks awesome.
What does not work is the arpeggiator/sequencer which uses an 8021 obsolete chip. I have not confirmed the chip is bad however. If that is important, a retrofit (and superior) sequencer with MIDI is available on eBay. Some pots are scratchy from the long years of sit, but it was always stored inside. Action on the keyboard is GREAT! Welcome back Pro-One for use once again!” Link

Pro One, Sequential Circuits @ 01 December 2016, Comments Off on Sequential Circuits Pro One

sci_pro_one “Great working condition. Very clean. Low serial number early model. Good cosmetic condition with some light blemishes. Has some scratches in the finish on the bottom consistent with wear from being used on a stand. It also has some light scuffing on some the keys which didn’t show up in the pictures. Other than that it is in great shape.

Recent professional service. All panel switches and potentiometer controls cleaned. All J-wire key contacts and buss bars cleaned. New keyboard bushings. Power supply recap. Complete calibration. Absolutely fantastic playing condition. Great vintage synthesizer.” Link

Pro One, Sequential Circuits @ 25 November 2016, Comments Off on Sequential Circuits Pro One

pro_one “Vintage Sequential Circuits Pro One Synthesizer in superb condition with no damage. Been tested. This has been a home system and hardly used. Model 100.” Link

Pro One, Sequential Circuits @ 17 November 2016, Comments Off on Sequential Circuits Pro One

sci_pro_one “Selling a pro one audio sequential synthesizer in good working condition very clean comes with manual ” Link

Pro One, Sequential Circuits @ 03 November 2016, Comments Off on Sequential Circuits Pro One

uesd_pro_one “In excellent condition. Recently serviced by The Analog Lab. This is one of only 10,000 synthesizers made by Sequential Circuits.”
Link

Pro One, Sequential Circuits @ 03 November 2016, Comments Off on Sequential Circuits Pro One

usd “I have had this since the early 80’s. It’s been on the road and in a studio. It has been thoroughly cleaned and all switches and pots have been cleaned with Deoxit. It has the j-wire keyboard. Everything works, and it sounds great! It could probably use new key bushings, but all the keys work fine. I have only one of the wood pieces for it, the other has been lost. ”
Link

Pro One, Sequential Circuits @ 03 November 2016, Comments Off on Sequential Circuits Pro One

o1 ” This keyboard was my brothers. He bought it new in the early 80’s and it’s been sitting alone in the attic for years. DOES NOT WORK. It comes as shown in photos. Sold as is. Missing an attack knob.

It’s one of the first 1000 off the production line.

I do not have box or manuals for the synthesizer.” Link