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

“This vintage Sequential Circuits PRO ONE synthesizer is a must-have for any music enthusiast. With 37 keys, this analogue keyboard is one of the most sought after . This is a completely unadertated version. No midi just the traditional cv in and out. Many modern drum machines and sequencers sync with cv and gate now and this Pro-One has been used with a beatstep pro.

With its unique analogue sound it has been used back in the day by the likes of Vince Clarke , Joy Division, and pretty much any credible artist .

Duel occillator It has a great arpegiator and short but punch step sequencer which is just a joy to use.

I have owned it snce 1982 and have recently cleaned it inside and out. The Keyboard is quite clacky and suffers from re-triggers but its 40 odd years old. You can replace the keyboard for a more modern one for about 200euros but I want to sell it in its original unadulterated form.” Click here to visit listing on eBay

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

“As seen in the pictures supplied, the panel and synth are in really nice condition – my opinion 9 out of 10.

One side cheek has a gnarled edge on the upper corner, but that does not affect the functions of the instrument. There are sellers who offer replacement side cheeks elsewhere on eBay).

The rubber key bushings have recently been replaced and the synth was serviced at Synth Restore. The keyboard is the J-wire version.

As you can see and hear from the video I uploaded, the unit works perfectly.” Click here to visit listing on eBay

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

“here im selling a very nice example of sequential circuits pro one classic analog synth

its in very nice cosmetic condition and fully working order

has been serivced before and the keybord rebushed” Click here to visit listing on eBay

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

“This unit is in Good to Very Good Cosmetic Condition. It does NOT WORK, and it has an issue with 2 pots on the top left corner. Includes Owner’s Manual and Technical Manual as seen in pictures.
Selling AS-IS, NOT WORKING< NO RETURNS! " Click here to visit listing on eBay

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

“I bought this Pro 1 brand new from Rod Argents Keyboards, Denmark Street, London, back in August 1982. It was the first synth I ever bought and my favourite too. It has never been gigged, but did spend a few years up my loft. However, for the past 8+ years it has been in my spare bedroom, mainly sitting on a stand doing nothing. I was hoping to get back into my music, but nothing has really happened, so I thought rather than let it gather any more dust, I may as well sell it and let someone else enjoy it. The original manual is still present. PLEASE NOTE Pick Up Only, this will give you the chance to test the machine before taking it and prevent damage in transit.

Needs a service, as the lower F key does not work and some of the pots/knobs could do with a clean-up. Also, small break in top of panel edge (see photo), but nothing major. Additionally, the side panels have been covered in white sticky-backed plastic, which is a little untidy in places. This could possibly be removed and the original wood re-instated, with a bit of time and effort.”

Click here to visit listing on eBay

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 with MIDI

“Experience the incredible sound of the Original Vintage Sequential Circuits PRO ONE Prophet One Analog Synthesizer.

With 37 high-quality keys and a variety of input/output ports including USB out, MIDI (DIN) in/out, and 6.35 mm TRS out, this analogue synthesizer is perfect for any musician or music enthusiast.

This keyboard synthesizer also features a pitch wheel, modulation wheel, and a pedal input, allowing you to create a unique sound that is all your own.

Whether you’re a professional musician or just looking to dabble in the analogue synth world, the Sequential Circuits PRO ONE is the perfect addition to your collection.

Refurbished with MIDI in and MIDi out.

As you can maybe tell by the video. I don’t really want to sell this. This is one of my favourite synths ever. Howeve, it’s in excellent, wonderful condition and it needs to be played more than I play it.” Click here to visit listing on eBay

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 Project Machine

” One of the knobs are missing. One of the pods has little resistance and will likely need to be fixed. The unit turns on but I am unable to fully test it. The wire has some imperfections on it as shown is some of the photos. The unit has some cosmetic wear. The keyboard piece is currently detached from the board and will be shipped out separated. There are some screws that I will ship out in a small bag. Everything that is included is shown in the photos. The unit is being sold as is for parts and repair. Please see photos for more information about the condition and any imperfections I might have missed. Again the unit is being sold as is. Thanks for looking. ”
Click here to visit listing on eBay

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 1 synthesizer in superb condition. I have owned this from new for about 40 years after buying it from Rod Argent’s shop in Denmark St in London, and apart from a few gigs in the 1980s it has spent its whole life in my home studio with only light use. It is the more desirable j-wire keyboard model and I have recently replaced all the key bushings so it plays like new again. All the controls work and are noise free (there is some slight noise at one point on the filter amount knob but I’ve never found this to be a problem in use). Note that there is no midi capability on this synthesizer but it can be added by using a Midi to CV converter such as the Kenton Electronics Pro Solo Mk3.
Also included is the original operation manual which explains how to use everything and how to adjust the tuning and scales, although I’ve rarely needed to do this as it has always been very stable. I will also include the original box that it came in, which is serviceable but looking a bit faded and tatty after so many years in my loft.
I have listed this as collection only due to the synth’s high value and the risk of it getting damaged in transit. ” Click here to visit listing on eBay

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 Vintage Analogue Synthesiser – Excellent condition and full working order, J-wire keyboard version. The classic analogue monosynth, with a huge range of sounds. Includes custom dust cover. The keyboard contacts were cleaned when I got it and it works fine, with occasional sticky contacts. It hasn’t been used for a while and would benefit from another clean if using the keyboard.” Click here to visit listing on eBay

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

“Fully functional Pro One in original condition with J-Wire keyboard. The synthesizer is in very good condition both visually and technically. In addition, I am giving a new and not yet installed TM-2 replacement kit (semi-weighted Fatar keyboard with mounting accessories) as well as Potikappen in the Prophet-5 look from the company. Techmechs Vintage Synth.”
Click here to visit listing on eBay

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

“WORKING CONDITION: Fair- Works about 90%. We cleaned the keyboard and exercised some knobs. Four of the keys are really sticky and tend to stay down when pressed, so they may need some mechanical adjustment. Seems like they’re all mostly engaging though. Some of the controls particularly the filter cutoff are a bit glitchy sounding. In all, this synth will need additional service besides cleaning and maintenance to get it to 100% Currently listed as in fair working condition.

PHYSICAL CONDITION: Very Good – There are some scuffs and dings around the synth. The keys are uneven and probably due for some new bushings, but otherwise, work and feel fine. All buttons, sliders, and knobs intact and ready for action. Overall, the physical condition is very good.

INVENTORY #49146

BRAND: Sequential Circuits

MODEL: Pro One

FUNCTION: Synthesizer

PRODUCT DESCRIPTION: This listing is for a Sequential Circuits Pro One 37-Key Mono Synthesizer

This item was part of Dennis Herrings’ studio production arsenal at his Sweet Tea and DTLA Recording studios.

SPECS:

Serial #9149” Click here to visit listing on eBay

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

“This needs a lot of work. Some keys trigger while others dont or have some contact issues. A wheel has broken off but can be bought and/or printed. This sale is As-is so treat it like you are purchasing for parts and anything else is a bonus. Turns on without issue. Great project for anyone that wants to replace the bushings, do some key work (def needed) and anything else that comes up.” Click here to visit listing on eBay

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 Synthesizer Model 100 Sold AS-IS for restoration. It powers up. I am not familiar with these. I do not know history. I think it is from 1979. I assume the power on/off switch went out so the previous owner hardwired it on. The only way to turn it off on is plug/unplug. One key is higher than others. I opened it up and saw one pin on connector the 16 pin connector was broken off. (see photo) I may have done it opening it up. Those are the only things I noticed. Sold as-is for repairs.” Click here to visit listing on eBay

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

“This is the J-wire version which Is supposed to be the better of the two. The keys like to double trigger anyways. It takes a bit of work to stay in tune, but hey it’s 40 years old. I made a whole album with this beast. If you wanna listen let me know. It sounds HUGE” Click here to visit listing on eBay

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

“For sale:

Sequential Circuits – Pro One – Rare Vintage Analogue Synthesizer

Fully serviced by Cyberwave EMS synth restoration in 2022. The synth is in excellent cosmetic condition, perfect working order and plays beautifully. Cyberwave, who have serviced hundreds of Pro Ones, said it was one of the best condition and cleanest Pro Ones they’ve ever seen!

The serial number is #4371 which makes it the most desirable of the Pro Ones produced as it’s the j-wire version (below #8500) which is more stable and easier to repair and also features the non-circuit board mounted power supply (above #1500).

It also comes with a custom flight case that protects and fits the synth perfectly.” Click here to visit listing on eBay

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 Analog Synthesizer Keybed And Chassis

“Sequential Circuits PRO ONE Analog Synthesizer 37 key Keybed And Housing. No synthesizer just the keybed and case in as-is condition. I believe the keys were working before the synth was removed but have no way to check. ” Click here to visit listing on eBay

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

“Excellent condition for its age. Has been completely gone through recently by a well known record producer / tech savvy. Only played occasionally and covered in the clear plastic cover when not used. Few cosmetic marks/blems as seen in the photos. Everything works as it should. All functions works.” Click here to visit listing on eBay

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

” Aficionados will recognise this as a relatively early example with the “J-wire” keyboard. Apparently this is easier to repair than the later version.

I have owned this for nearly 40 years and never gigged it. After a long period of non-use I was pleased to find that everything appears to be working, although the keyboard is quite “clicky” and I noticed occasional re-triggering or slurring of notes. So you can have fun with it right away but for serious work I would strongly recommend a service. Cosmetically it is fine apart from traces of marker pen applied by me for security purposes, back when iI was living in a dodgy part of town. See the photos for details. As you will see, all the knobs and switches are present and correct.”
Click here to visit listing on eBay

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

“I have owned this for nearly 40 years and never gigged it. After a long period of non-use I was pleased to find that everything appears to be working, although the keyboard is quite “clicky” and I noticed occasional re-triggering or slurring of notes. So you can have fun with it right away but for serious work I would strongly recommend a service. Cosmetically it is fine apart from traces of marker pen applied by me for security purposes, back when iI was living in a dodgy part of town. See the photos for details. As you will see, all the knobs and switches are present and correct.” Click here to visit listing on eBay

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

“A used Musical Synthesiser that is in a great condition. The item is used and does have some wear and tear. The synthesiser has recently been fitted with a new plug and comes complete with the flight case and wooden stand sides. Every key does work.

The item is sold as seen. ” Click here to visit listing on eBay

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

” For sale, Sequential Circuits Pro One. Everything works but some knobs could probably use a cleaning. Comes from a good owner with several nice features and improvements:

S/N 100-0028, 1981
Original Manual
Custom Road Case by Emperor Cabinets in Chicago
Dust Cover
MIDI add-on
J-Wire keyboard
Prophet 5 knobs instead of original knobs, quite snazzy
Attached power cable replaced with standard 3-prong “PC” adapter, will include cable

Due to the age it is being sold as-is.”
Click here to visit listing on eBay

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

” For sale, Sequential Circuits Pro One. Everything works but some knobs could probably use a cleaning. Comes from a good owner with several nice features and improvements:

S/N 100-0028, 1981
Original Manual
Custom Road Case by Emperor Cabinets in Chicago
Dust Cover
MIDI add-on
J-Wire keyboard
Prophet 5 knobs instead of original knobs, quite snazzy
Attached power cable replaced with standard 3-prong “PC” adapter, will include cable

Due to the age it is being sold as-is.” Click here to visit listing on eBay

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 1 Full Kenton MIDI Spec and new keyboard.

I’ve owned this unit for 14 years about and when I had Kenton fit the midi retrofit the engineer said it was in exceptional condition inside and out.

I have also fitted a new Techsmechs Fatar keyboard … I have a Nord stage 3 compact with waterfall keys and it’s a Nord and great to play but this has been said and it’s easily as good …

.. ~~~Nords are unquestionably top notch instruments, but several times I’ve seen the opinion expressed that the Fatar TP40 and TP100 keybeds feel better on other instruments than they do on Nords that have the same actions, and I tend to agree. ~~~🤷🏼‍♂️

So it has a Fatar keyboard and this is a dream to play ..like butter no more clickety clack keys and poor contact issues …

But I also have it’s original Keyboard boxed and is included.

The nobs have also been replaced with Techmechs … and there are no duff spots or crackles on the pots and it all tunes and lines up properly.

It also comes with the red swan flight case but being such a delicate item I would advise collecting or a very careful courier organised by you ! ” Click here to visit listing on eBay

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

“This listing is for one used original vintage Sequential Circuits Pro~One synthesizer. I bought this used in 2011, it had been previously stored in an attic for years. It has lived in my home studio ever since.

I had the oscillators tuned and power plug replaced by a professional. I replaced all key bushings and cleaned the J-wire myself. It is in excellent condition. Please scrutinize the pictures. Everything works flawlessly. The keys will double trigger, but that’s j-wires for you. Clean them and they work great until a spec of dust rests on one. ;-)”
Click here to visit listing on eBay

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

” I bought this over 10 years ago – and it has been in storage. I have therefore had it serviced a few months ago to ensure it functions properly.

I can’t really grasp the concept of envelope generators and oscillators etc to make good use of this machine – I much prefer the pre-sets which I have a plenty on the Korgs, Roland and Alesis keyboards in my arsenal. So rather than put the machine back into storage, I have decided to sell it – hopefully to someone who understands analogue synths and can put it to optimum use. ” Click here to visit listing on eBay

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

“Early 80s Sequential Circuits PRO 1 Analog Synthesizer + Manual.

I’ve had this synth for about 5 years and I just don’t get enough use out of it anymore.

It’s due a service as several of the pots crackle and need a clean.

It’s also fitted with the less desirable membrane key board which needs upgrading (anyone that’s familiar with Pro Ones will know exactly what I mean). For this reason a few of the keys no longer work. However, if you are planing on using this synth via CV, like many people do, this doesn’t present any problems.

The service that needs doing is reflected in the price that I am asking.

Apart from the above it works exactly as it should. It’s also in fairly good aesthetic condition for a synth of its age (please see pictures).

I did consider servicing it and relaying the keyboard myself, however I have neither the time nor the desire to do so. ” Click here to visit listing on eBay

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

Recently installed brand new Fatar keybed (that which you find on the OB6, Prophet 6)

it has a great feel, lovley to play.

Recently serviced all checked, its 100% functioning and working like it should.

Will pack bullet proof, with priority tracking.” Click here to visit listing on eBay