“Sequential Circuits SCI Pro One Monosynth aus Anfang der 80er
Analogsynthesizer der Spitzenklasse. J-Wire Tastaturversion. Einwandfreie Funktion.
Neben Minimoog und Arp Odyssey klassischer analoge Synth. Äußerst vielseitiges Gerät.
Top-class analog synth. J-Wire keyboard. 100% working condition.
Classical analog synthesizer. Very versatile unit.” Link
“I’m selling a mint condition classic Pro-one analogue keyboard.I purchased this pro-one about 3 years ago after it had been professionaly serviced and reconditioned,(which included all of the keyboard pads being replaced). This great warm sounding synth has hardly been used since I bought it and is only being sold as I now work with an all software set up. This is the j-wire version (check out pictures),so buyers will not have to worry about a faulty membrane keyboard often experienced with the 8000+ serial number. All knobs, switches and wheels work excellently. As you can see from the pictures above it has the wooden side panels and all the manufacturers name plates and serial number tag.” Link
“Sequential Circuits Pro One
– analoger Synthesizer Klassiker -
– einer der vielseitigsten Mono-Synths überhaupt -
Top Zustand! neueste Revision 1.2 (mit J-Wire Kontakten)
komplett neu gewartet!
Alle Potis, Buchsen, Platinen und Tastaturkontakte wurden gereinigt. Das ganz Instrument wurde komplett neu gestimmt.
Alle Keyboard Bushings wurden gegen neue getauscht. Die sonst recht anfällige Tastatur spielt sich jetzt wieder fast wie bei einem Neugerät. ” Link
“here is a very good condition pro one is full working order, serviced and working very well, sounds incredible, buyer to collect only. thanks” Link
“Sequential circuits pro one synthesizer,wooden sides missing,one knob missing one broken key,loose casing and no cables,was in workin order before storing but now untested,thanks for lookin happy bidding,any questions please ask.50 pound deposit and cash on collection,collection only I will not post this item.” Link
“Sequential Circuits Pro One Monosynth in amazing condition! I’ve owned this unit for about a year, when I bought it it was just refurbished by Wine Country Synths. I’m moving overseas and unfortunately can’t take the Pro One with me. The machine plays beautifully, and there is no cosmetic damage whatsoever.” Link
“Sequential Circuits Pro One Analog Synthesizer.
100% Functional
Just installed NOS Curtis Voice Chips
Gold Paint Job
No Scratchy Pots
All Switches work
Tuned
New Key Bushings installed and keyboard leveled
Sequencer Tested
CV ins and outs tested” Link
“Sequential Circuits Pro One
– analoger Synthesizer Klassiker -
– einer der vielseitigsten Mono-Synths überhaupt -
Top Zustand! neueste Revision 1.2 (mit J-Wire Kontakten)
komplett neu gewartet!
Alle Potis, Buchsen, Platinen und Tastaturkontakte wurden gereinigt. Das ganz Instrument wurde komplett neu gestimmt.
Alle Keyboard Bushings wurden gegen neue getauscht. Die sonst recht anfällige Tastatur spielt sich jetzt wieder wie bei einem Neugerät. ” Link
“Sequential Circuits Pro One Vintage Analogue Synth
Excellent condition. Full working order and serviced. With user Manual and box
This is a rare opportunity to own a superb example of a classic vintage synth. I purchased this new from Rod Argents Keyboards in 1981/82 having seen it used by Vince Clarke in Yazoo. It only saw bedroom use for about 18 months before I gave up all hope of being a new romantic pop star and it has been in storage in the loft virtually since then. As a result it is completely original and in excellent condition. I had it fully serviced last month by Ben Rossborough from Cyberwave EMS (vintagesynths.co.uk). It is in perfect working order (all knobs, switches, and wheels) The keyboard is perfectly alligned and you can see from the photos that it is the sought after J-Wire version (serial number 8000+ have a notoriously faulty membrane keyboard)
It comes with the instruction manual and in the original box. It has a beautiful rich analogue sound (even when i play it) which cannot be matched digitally.” Link
“SEQUENTIAL CIRCUITS PRO ONE IN PRISTINE CONDITION
THIS PRO ONE HAS BEEN COMPLETELY DISASSEMBLED AND CLEANED THROUGHOUT.
EVERY ASPECT OF THE SYNTH HAS BEEN FIXED OR REPLACED WITH NEW PARTS.
MISSING SCREWS HAVE BEEN REPLACED, THE KEY BOOTS HAVE BEEN REPLACED THE SPRINGS AND J WIRES HAVE BEEN RE-ALLIGNED, THE POWER CABLE HAS BEEN REPLACED WITH A 12 AWG ONE, MOST IMPORTANTLY THE POWER SUPPLY HAS BEEN COMPLETELY REBUILT.
THE PRO ONE’S ARE KNOWN FOR THE STICKY KEYS AND POWER ISSUES.
THIS ONE IS UNIQUE AND HAS BEEN COMPLETELY REDONE, IT WORKS PERFECTLY IN EVERY WAY, AND IT IS BUILT TO LAST.
NOW, I WILL EXPLAIN INTO DETAIL ON HOW THE RESTORATION PROCESS WENT
-FIRST THE ENTIRE SYNTH WAS DISMANTLED, THE MAIN PCB WAS TAKEN OFF AND DISCONNECTED, THE KEY BOARD WAS TAKEN OFF, ALONG WITH THE WOOD SIDES, POWER TRANSFORMER AND ANY JACKS, AND SWITCHES.
-ONCE EVERYTHING WAS TAKEN APART THE ENTIRE CHASSIS WAS CLEANED AND POLISHED USING ADHESIVE CLEANER AND ALCOHOL, THE GROUND FOR THE TRANSFORMER WAS SHAVED DOWN MORE TO GUARANTEE A MORE SECURE CONNECTION.
-THE CIRCUIT BOARD WAS THEN CLEANED INSIDE AND OUT USING A SAFE PROPRIETARY CLEANING AGENT, EACH AND EVERY POT, SWITCH AND SLIDER WAS LUBRICATED AND CLEANED
-NEXT, THE ORIGINAL POWER CORD WAS COMPLETELY TRASHED, SO IT WAS TAKEN OUT AND REPLACED WITH A HEAVY DUTY 3 PRONG CONNECTOR AND 12 GAUGE WATER PROOF POWER WIRE, THE STRAIN RELEIF WAS CUSTOM FIT WITH BIGGER HOLE BEING DRILLED INTO THE CHASSIS
-THE POWER SUPPLY WAS COMPLETELY REBUILT, BY CHANGING OUT THE VOLTAGE REGULATORS WITH NOS ONES AND SWITCHING OUT THE CAPACITORS WITH NOS NICHICON’S, THESE TWO MODIFICATIONS REALLY BRING OUT THE CLARITY AND VOLUME OF THE SYNTHESIZER
-LASTLY THE ENTIRE KEYBOARD WAS DISMANTELED, CLEANED, POLISHED, LUBRICATED, ADJUSTED AND FIXED. EVERY KEY ORIGINALLY STUCK AND THIS WAS DUE TO THE OLD BOOTS BEING COMPLETELY DISINEGRATED. EVERY CRUSTY BOOT WAS TAKEN OFF AND REPLACED WITH A PROPRIETARY FIT FOAM AND RUBBER ENCAPSULATING BOOT. EVERY KEY WAS REMOVED, CLEANED AND POLISHED INDIVIDUALLY, GETTING OFF THE DIRT, RUST AND LEFT OVER REMAINED OF THE ORIGINAL BOOTS. EACH SPRING WAS TAKEN OFF AND RE-ALIGNED. EACH JWIRE WAS THEN RE STRAIGHTENED AND TESTED FOR QUALITY ASSURANCE. EVERY KEY NOW PLAYS LIKE THEY DID WHEN THIS SYNTH WAS FIRST PURCHASED.
- THE WOOD PANELS WERE CLEANED, BUT WERE NOT RE LAQUERED BECAUSE THEY ARE IN GREAT CONDITION.
THIS SEQUENTIAL CIRCUITS PRO ONE SYNTHESIZER IS GUARANTEED TO WORK GREAT AND SOUND SPECTACUALAR. OVER 14 HOURS OF TIME WAS PUT INTO THE RESTORATION PROCESS OF THIS SYNTHESIZER AND EVERY LITTLE DETAIL REALLY HELPED MAKE THIS SYNTH FEEL AND PLAY GREAT. YOU WILL NOT BE DISAPPOINTED IN THE PERFORMANCE OF THIS SYNTHESIZER. ” Link
“THIS LISTING IS FOR ONE VINTAGE SEQUENTIAL CIRCUITS PRO ONE SYTHESIZER. THIS ANALOG UNIT IS USED BUT IN GOOD CONDITION. IT WAS USED BY A PROF. MUSCIAN BUT HAS BEEN IN STORAGE FOR THE LAST 15 YEARS OR SO. JUST PLUGGED IT IN YESTERDAY AND ALL OF THE KEYS WORKED FINE BUT THERE WAS A LITTLE NOISE FROM THE AUDIO OUT JACK. THIS UNIT WILL NEED PROFESSIONAL CLEANING AS IT HAS BEEN STORED. I DID NOT CHANGE ANY OF THE SETTINGS OR PLAY WITH IT MUCH, SO IT IS BEING SOLD “AS IS”. THE EXTERIOR OF THE UNIT IS IN FAIR TO GOOD CONDITION. AS YOU CAN SEE IN THE PHOTO ALL OF THE LABELS AND PANEL KNOB INFORMATION IS STILL INTACT AND THE KEYS ARE STILL SHINY. THE WOOD GRAIN SIDE PANELS HAVE A FEW MINOR DINGS, AND THERE IS SOME SCRATCHES IN THE UNDERSIDE PAINT AND I BELIEVE ( NOT SURE) THAT A FEW OF THE POWER LIGHTS ARE MISSING AND THE WHEEL SCREWS ARE LOOKING RUSTY.” Link
“Up for auction is Sequential Circuits Pro~One analogue monophonic synthesizer. This vintage instrument is in fully working condition, calibrated and tuned, ready to play.
The unit looks very good for its age. The wooden side panels are in great nick. The synth is very clean with all the original knobs and switches in place. All knobs and switches work smoothly and quietly and the keyboard (J-Wire type – the one to get) triggers flawlessly.
There are some tiny scratches on the chassis below the pitch bend wheel, the mod wheel has some internal cracks visible when moved up but it’s smooth and solid on the surface. There is a barely noticeable scratch on one of the white keys.
The sound of this machine is gorgeous and powerful. Fantastic thick bass, lovely PWM and sync sounds and amazing gliding leads are its forte. Pro~One is thought to be a single voice Prophet 5 but due to its monophonic nature the synth has much more attitude. ” Link
“Sequential Circuits Pro One
– analoger Synthesizer Klassiker -
– einer der vielseitigsten Mono-Synths überhaupt -
Top Zustand! neueste Revision 1.2 (mit J-Wire Kontakten)
komplett neu gewartet! kein Rauschen/Brummen oder Potikratzen
Alle Potis, Buchsen, Platinen und Tastaturkontakte wurden gereinigt. Das ganz Instrument wurde komplett neu gestimmt.
Alle Keyboard Bushings wurden gegen neue getauscht. Die Tastatur spielt sich jetzt wieder wie bei einem Neugerät. ” Link
“Up for sale is a SEC Pro One in great condition. The synth is fully functional; all knobs, sliders and switches do what they’re supposed to. The only flaw is the middle F-sharp key, which sometimes falls into the keybed if pressed too hard. I have the wood panels for this synth.” Link
“I’m looking to sell my Sequential Circuits Pro-One synthesizer, SN # 9129, which in its current state is semi-playable. To my knowledge, it is mostly functional except for the following issues:
- The main problem with this synth is the keyboard, which is hit-or-miss as far as responsiveness. Some keys (particularly on the lower end of the keyboard) sound pretty reliably while others need a good whack to get them to go off. There are no completely dead keys. I believe this particular synth has membrane-type key contacts, which I’ve read are notorious for being finicky.
- The Audio Out is crackly and the sound sputters from time to time.
- The square waveform on Oscillator A is faint, except for when the Oscillator Sync in turned on, at which point it sounds louder. It also is not affected by the Pulse Width knob, but it can be tuned and the octave can be changed.
- The noise generator makes sound, but it too is somewhat faint. I always just turned down the oscillators and it sounded fine.
- I never understood how the Record/Play switch was supposed to work, but I never noticed it did anything when I switched it. Perhaps I’m missing something, or perhaps it doesn’t work. The same goes for the CV In and other jacks on the back: I’ve never used anything but the Audio Out so I don’t know if the other ones work or not.
- This synth temporarily makes a loud squealing noise when shut off. This doesn’t affect function, but I thought I’d mention it.
Otherwise, I believe everything else works. As of now, I could turn it on and play melodies on it and vary the sound with the controls, it’s mainly that some notes sputter or don’t come on right away.
Cosmetically, it is in fairly good condition, as can be seen in the pictures, however, the wooden side panels are not original. When I bought it, it didn’t have side panels so I made my own. Whoever owned it before me also had stuck labels on the top part of the control panel and their outlines are still visible. There are also a few scratches on the bottom and back side of the unit. One of the screws supporting the Pitch and Mod Wheel assembly is not original and loose.
Needless to say, THIS SYNTH COULD USE SOME REFURBISHING. This being the case, it is being sold AS IS.” Link
“Sequential Circuits Pro-One Synthesizer
Model: 100 Synthesizer
Serial: 8420
Condition: Item is in good overall used condition. The unit is a bit dusty from storage and a couple of the keys are is lower on the keyboard than the others.
Functional Notes: We replaced the fuse cover on this unit and tested. The unit powers and all knobs/buttons are functional. We do not have the knowledge of this piece to fully test.
Unit comes with 3 extra fuses.
We are selling this item as is. ” Link
” Up for sale is my minty Sequential Circuits Pro One. I honestly can’t find a flaw on it. Sort of ridiculous since it was made in 1981. Very low serial number 0671! I can not 100% guarantee that there isn’t something somewhere, but I have never written that an old piece of equipment I have sold was in this condition. Look at my feedback and bid with confidence. Oh and it sounds amazing, doesn’t have noise issues associated with old keyboards. 100% functional, J Wire version. I guarantee another one like this won’t come around anytime soon. This is an actual picture of the Pro One I am selling though I had to take it with someones cameraphone, as, I have no digital cam right now. Pic does not do it justice. ” Link
“Sequential Circuits Pro One Keyboard
Ready to rock out?
This is the one. Vanilla Ice used this in an Mtv video. Jake Scott, son of Ridley Scott used this synth in a commercial with me. It goes to eleven. All knobs are new. Wana move heads?” Link
“I recently(September) purchased this well-saught after synth! I love it, but while it was in shipping, I acquired another very similar one!
Unfortunately, I cant keep both. This is the same synth that Metric plays with; it’s full of monosynth, powerful, wholesome sound. Other than a few scratches, its in prime condition.” Link
“One of the most powerful Bass machines you can buy today. Packed with features and modulation options not found on many other mono synths
Earth shattering bass and screaming leads as well as some of the best sound effects and drones possible
Dual osc mono synth using the classic CEM synth chips as found in the best analogue synths such as the Prophet 5, Oberheim OBXa, Moogs and most other top end systems
The pro one is basicly the same synth as a Prophet 5 but has 1 voice. If you layer the sounds when recording it can sound just about the same. Actualy the Pro One is my a long way phatter than the Prophet 5 for bass
Just been fully sericed and tested to make sure everything is in top notch order… all switches and pots were cleaned with Deoxit cleaners and lube.. synth re-tuned, keyboard serviced having all the J-wires and bars cleaned and also a full new set of rubber bushings fitted which have been lubricated with the correct original grease compound” Link
“You are viewing a Sequential Circuits Pro One Vintage Analog Synthesizer that I have for sale. Its serial number is 2798. I have had this synthesizer gone over by a synth technician to ensure that it works terrifically. The J-Wire keyboard was gone over to improve its function and ensure that it works for years to come; all pots were removed and cleaned. The octave toggle knob on the second oscillator was missing, and was replaced with a knob that is not original to the Pro One, as you can see in the picture. Aside from this, everything on here is what you would find on one of these the day it came out.
This is one of the all-time great synthesizers; it features arpeggio and sequencer features, which are very rarely found on monophonic synthesizers from this era. And its oscillators sound like a dream; the triangle waveform is in my opinion the best I’ve ever heard.
I will ship this for free if you live in the United States. One note, however: this is an old synthesizer, and I am not responsible for keyboard tracking falling off a bit during shipment. This is readily fixable, however, and directions for doing so can be found on the internet. As of now, keyboard tracking is perfect.” Link
“Sequential Circuits Pro One For Sale
You Get.
1 x Pro One KeyBoard With Lead And Plug (240 volts Uk)
1 x annotated manual
I have owned this for 12 years and it has seen little use.
It’s crisp and ready to go. Home use Only.
I have put up lots of pictures so you can see what you are getting.
The front logo was like it when i bought it and is cosmetic as does no effect the playing in any way.
There is a tiny scratch on one key shown in pic, very small. For a 30 year old Classic it is in good condition.” Link
“For sale is a very special Sequential Circuits Pro One. It has a new custom wood casing made by Synthwood, including a blue illumination wheel mod and prophet 5 knob kit. The original knobs are also included. Mint condition and fully functional. Comes with original manual. The more sought after J-Wire version. Serviced last year and is fully operating at factory specs. New key bushings, calibrated, tuned, the works. See pictures below for more details.
If there is one Pro One out there to get, this is the one.” Link
“Sequential Circuits Pro One SN:2075 The lower S/N means this is a J-wire model. It has been recently brought back from the dead and is ready to go 100%. The first thing it got was a good dose of fader lube, so all pots and switches glide and do not scratch, pop, miss, or stick. Next it got new key bushings, so the new soft rubber has turned a bunch of clacking into a bouncy, pleasant bump… the quality of this feel was confirmed on its last stop to… Wine Country just gave it the once over including replacing a faulty 3310 in the amp section. Notes rang forever, but now everything has been given the expert’s review and this keyboard is 100% functional.” Link
“For Sale I have my much loved Sequential Circuits Pro One mono synth. The unit is in excellent condition for it’s age and working perfectly.
It has the more reliable J-Wire keyboard. I imagine any one interested in such a classic synth may know a thing or two about it already, so I won’t go into detail, otherwise there are many resources online.
It was serviced last year and inspected and tuned this month, by much respected synth service specialist Kent Spong.
It’s always been kept covered and protected when not used.” Link
”
This is a very nice Sequential Circuits Pro One for sale. It has a low serial number (#2269) and is one of the coveted J-wire models. It was purchased from Pied Piper Music in 1981 and I am the original owner. I used it a great deal in the early 80′s but as programmable synths became more reasonable the Pro One got used less and less. It has been in storage since the late 80s and I am offering it for sale so that someone else can enjoy the power and flexibility of this synth. It really is amazing and was groundbreaking in its time. Visit http://www.vintagesynth.com/sci/seqpro1.php for more specific information.
The unit is mostly original with a couple of exceptions: All of the key bushings were replaced last year so the keyboard is tight and functional. The J-wires were cleaned at the same time so they are due to be cleaned again. The original red fuse holder was defective so it was replaced with an orange holder obtained from Wine Country http://www.winecountrysequential.com/ . These are the people you want to contact if you need Sequential Circuits parts or service. One of the pitch or mod wheels broke shortly after I got the Pro One and was replaced with a wheel obtained from Sequential Circuits. This was a common problem with the Pro One. One of the rubber feet came unscrewed and was lost. I found an identical foot but could only find a phillips head screw to replace it. Other than those small issues the Pro One is original. It has been well maintained and is ready to satisfy your creative urges. The original manual is included.” Link
“For sale is a very special Sequential Circuits Pro One. It has a new custom wood casing made by Analogics, including a blue illumination wheel mod and prophet 5 knob kit. The original knobs are also included. Mint condition and fully functional. Comes with original manual. The more sought after J-Wire version. Serviced last year and is fully operating at factory specs. New key bushings, calibrated, tuned, the works. ” Link
“This auction is for a Sequential Circuits Pro-One synthesizer. If you’re here you probably know what it is, but just in case, this is an analog, monophonic (one note at a time) synthesizer that is roughly equivalent to one voice on the famous Prophet 5 synthesizer. It is serial number 4791. The circuit board is dated 10-28-81 and the warranty tag is dated 7-23-82.
GOOD NEWS: This keyboard plays and sounds fantastic. It is the earlier J-Wire model which is more reliable (and therefore more sought-after). I replaced the key bushings and springs, cleaned and de-oxidised the key contacts, and lubricated the knobs. So, the keyboard is now even with a smooth action (no clanky keys) and the output is very clean with no discernable noise. You are of course free to show up and see for yourself if you are located in the NYC metro area, with no obligation to buy.
BAD NEWS: This synthesizer was modified at some point in time during its life. Some holes were cut in the plastic body to make room for a sequencer, but the modification was poorly performed and so it was removed. These holes have now been patched over, which can be clearly seen in the photos below. Other than this, the synthesizer is in pretty good cosmetic shape for a 30 year old piece of electronics. It has no impact whatsoever on the instrument’s sound or functionality.” Link
“Selling my much loved Sequential Circuits Pro-One Synthesizer, serial number 100 – 4288. The synth is one of the early J-WIRE models, and is in mint condition with all potentiometers and variables working fine and without crackle/hum. The keys were given a recent going-over to ensure they all work correctly, and I’m glad to say everything is running as smoothly as the day it was made.” Link
“Possibly the best Mono synth ever made….
One of the most powerful Bass machines you can buy today. Packed with features and modulation options not found on many other mono synths
Earth shattering bass and screaming leads as well as some of the best sound effects and drones possible
Dual osc mono synth using the classic CEM synth chips as found in the best analogue synths such as the Prophet 5, Oberheim OBXa, Moogs and most other top end systems
The pro one is basicly the same synth as a Prophet 5 but has 1 voice. If you layer the sounds when recording it can sound just about the same
Just been fully sericed and tested to make sure everything is in top notch order… all switches and pots were cleaned with Deoxit cleaners and lube.. synth re-tuned, keyboard serviced having all the J-wires and bars cleaned and also a full new set of rubber bushing which have been lubricated with the correct original grease compound
Keyboard is like new again and great to play. Most people moan the keyboards are not good on these but thats not the case. They’ve just not been looked after or serviced
As before this is the better J-Wire version which doesnt suffer from contact issues” Link
“Sequential Circuits Pro-One
This thing looks and sounds amazing.
Everything is working and sounding PERFECT!
Looks like new, Works like new -
Very little signs of wear –
No dirty pots no stuck keys.
It’s been kept safe in my smoke-free studio for the past 5 years.
SERIAL# 100-2028
J-Wire style keyboard! (not the membrane type)
If you have been wanting a Pro-One you will be more than happy with this unit.
I love this keyboard… but I have to sell it.” Link
” This synth is in excellent condition for its age with all keys, knobs and sliders in functional and operating condition. This is the J-Wire version of the synth
This Pro-One is fully functional. The keyboard is J-Wire and the power supply is mounted to the chassis. The serial number is: 100-7406
I purchased this synth earlier this year and am selling to fund purchase of a house. The previous owner claims to have never gigged it and to have been the 3rd owner. It has also never left my studio.
It has been recently tuned and cleaned. As you can see it is in excellent cosmetic condition. All keys move freely and evenly. There are no noisy pots.” Link
“THIS VINTAGE SYNTH IS IN FINE WORKING AND COSMETIC CONDITION. ONLY USED IN THE SMOKE FREE STUDIO. IT COMES WITH POWER CABLE ONLY. THIS IS PART OF OUR LIQUIDATION INVENTORY. ” Link
“Up for bid, or Buy It Now is 1 (one) VERY early serial number, VINTAGE 1981 Sequential Circuits Pro One.
More sought after “J-Wire” version. All original, no mods. Recently completely maintenance serviced” Link
“ich verkaufe mein Pro one
nur ein taste wie auf dem bild gesehen haben abgebrochen ( trotzdem funktioniert einwandfrei )
sonst technisch und optisch guten zustand
viel spass beim bieten ” Link
“You are bidding on a fully working Sequential Circuits Pro-One synthesizer. I have played, recorded, and maintained this unit for the past 6 years and it’s in fantastic condition. There is a small ding on one of the wood panels and one near the filter section. All the switches, pots, and keys work flawlessly.
Incredible tone and frequency range from it’s 2 main oscillators (oscillator B has a low frequency mode), a very smooth filter, modulation matrix, control voltage in and out, LFO with 3 waveforms (or combinations thereof), a simple sequencing section, and a buddah printed on the circuit board. You can also run an external line in through the filter and control the unit’s gate.
The keyboard is the J-wire style which apparently, is easier to maintain than the membrane style. A key got stuck down a few years a go and it was a simple fix to go in and bend one the J-wires back into place. Replacement parts and midi kits can be purchased at www.winecountrysequential.com
The Pro-One is an analog warthog; different than a moog, just as phat. Used by top artists such as: Depeche Mode, The Prodigy, The Chemical Brothers, Nine Inch Nails, and Dr. Dre.
Original manual is included, however all the blank pages for transcribing patches have been written on.” Link
“This synth is in VG+ cosmetic condition with light scratching top bottom front back sides and light tarnish on some metal parts as depicted. It works great EXCEPT for some intermittent key contacts, and several keys do not appear to connect at all, those are first octave B; second octave D#; and third octave G#. I suspect this problem could be solved by unscrewing the top and cleaning the key contacts, however, I am not skilled enough to perform this operation. The greatest strength of this synth IMO is the interaction between the arpeggiator, the filter and the envelope. The filter sounds fantastic. And, one can achieve extremely psychedelic effects by turning dials on the filter and the envelope while holding down various keys to arpeggiate between those notes” Link
“SEQUENTIAL CIRCUITS PRO ONE SYNTHESIZER
This is an INCREDIBLY HUGE FAT SUBBY sounding synth ! Not many were made.
It’s capable of the subbiest bass i have ever heard
This is the J-Wire version which is better than the membrane key version.
This synth has very recently been gone over and tested completely by a Sequential Circuits tech…
Everything works as it should, no problems at all !” Link
“Pictures are of actual item. There are two keys that need to be pressed a bit harder than the others. Could just need a cleaning. Otherwise excellent. Includes manual. ” Link
“FOR SALE SEQUENTIAL CIRCUITS PRO ONE 2 VCO MONOPHONIC SYNTH IN VERY GOOD CONDITION. 100% FUNCTIONAL.
PRO ONE PLATE IS CANCELLED AS YOU CAN SEE IN PHOTOS.
PITCH BEND WHEEL IS GLUED BUT QUITE UNNOTICEABLE.
KEYBOARD IS A J-WIRE TYPE SO BETTER THAN THE OTHER TYPE AS IT WILL LAST FOREVER.” Link
“The Sequential Circuits Pro-One synthesizer. This synth is in near mint condition and was recently cleaned and gone over by Ed Miller, basically the most famous of Los Angeles synth repair men alongside Kevin Lightner. I had Ed clean the pots and make sure everything was in working order. I recently tried to tune the keyboard and think I got in over my head…. so it might need to be tuned/calibrated. There’s four screws inside the synth that will calibrate all of the oscillators, you can access them without having to open the synth through small holes on the faceplate… so that will probably need to be done, and the manual talks you through the process. ” Link
“verkauft wird ein seuencial circuits pro one analogsynthesizer
.er besitzt einen onboard bis zu 40 step internen sequencer ..wird einfach note für note über die tastatur eingegeben ,easy !
klasische bassläufe wie zb donna summers i feel love ,kein problem .
technisch alles super die taster schlagen sofort an und die potis kratzen nicht ,
mit den zusätzlichen gate cv ins lässt sich der pro ( auch die sequencersteps )auch extern von anderen synths oder drummaschienen wie zb. tr.606 oder 707 alles was raustriggert,, ansteuern .
ich habe meinen immer mit dem darktime von döpfer gesynkt..
mein sci one wurde zusäzlich von meinem vorgänger ( händler aus berlin ) mit einem midi in out und zusätzlichen cv gate outs ausgestattet ,dazu wird aber ein zusätzliches netzteil bvenötigt , leider weis ich die voltstärke nicht ,wollte auch nicht einfach mal ausprobieren ,war mir zu gefährlich ,, (siehe fotos alles sehr provessionell verbaut !!!!!!!)
natürlich hat der pro auch ein paar kratzer an den seitenpanelen ,siehe fotos , bei mir stand er aber immer in meinem nichtraucherstudio ,und wird einfach zu selten benutzt ..scheiss arbeit ,,,
fraaaaaaaaaaaaaaaagen ??? gerne ich werde alles beantworten ,schaue jeden abend mal in die auktion rein ,technische details wie wann wo muduliert bitte aus dem netz ,,
der synth wird suuuuuuuuuuuuper gut verpackt versendet oder auch in münchen zum abholen ,
da ich privat verkäufer bin kann ich leider keine reklamationsanspüche oder umtäusche geltend machen ,,” Link
“This is for a Sequential Circuits Pro 1. This keyboard has been shelved as part of my personal collection for the last 8 years. I fired it up today it and considering it’s 30 years old, it works great! I spent about 30 mins playin with it and you can tell the more the unit gets used the better it performs. The filter on this thing is sick! Hopefully you’ve already messed with one of these cause its impossible to explain the sound of this thing.. The unit can be tested and picked up from quad studios in NYC if you’re in the are. Please email if you have any questions. ” Link
“Introduction:
I’ve decided to let one of my Sequential Pro One’s go 
I’ll assume you know how great they are, but if not, send me a message and I’ll tell you all about it 
About this model:
This one is a later membrane keyboard model. In 2005, the previous owner had this model’s keyboard assembly completely revamped by a synth tech and it now works great. Admittedly, as a back up to our J-wire main stay, it has hardly had any use at all over the years since we’ve had it, but all these years later the keyboard remains in perfect working order. The reality is that all Pro One keyboards are terrible, and for most people, it is a non issue because via a MIDI to CV converter, users are free to trigger the electronics via a plethora of MIDI controllers that are out there.Anyway, with that titbit out of the way, I can confirm that every works gloriously!
Condition:
Is excellent. All potentiometers rotate smoothly and crackle free. There are some cosmetic scratches consistent with an instrument hailing from the eighties era, particularly on the bottom of the unit; please see the images as below. ” Link
“Hi,
DON’T MISS OUT RARE ITEM!
All the functions are working perfectly and as you see in the pics it is in very good shape for its age.
It works on 100~240v.” Link
“Ich verkaufe den Kultsynthie der frühen 80er, den wunderbar fett klingenden, monophonen Pro One. Der Synthie ist gut erhalten, funktionsfähig und hat auf dem Schriftzug rechts eine kleine Delle-gelebte Geschichte. Auch dieses Exemplar hat die alte Pro One-Krankheit der unterschiedlichen Tastenhöhen was dem Spielen aber nicht abträglich ist. Einfach Klasse ist der Klang des Teils-dieser sagenhafte, fette Prophetsound. Ich habe ihn lange live benutzt aber nun ist Feierabend…Da dies ein Privatverkauf ist gibt es keine Garantie bzw. Gewährleistung. Viel Spaß beim Bieten, Ersteigern und Spielen.” Link
“This is for a Sequential Circuits Pro 1. This keyboard has been shelved as part of my personal collection for the last 8 years. I fired it up today it and considering it’s 30 years old, it works great! I spent about 30 mins playin with it and you can tell the more the unit gets used the better it performs. The filter on this thing is sick! Hopefully you’ve already messed with one of these cause its impossible to explain the sound of this thing.. The unit can be tested and picked up from quad studios in NYC if you’re in the are.” Link
“Der Pro One ist neben dem Minimoog der beste analoge Synth. Fette Bässe, unverkennbare Sync Sounds und komplexe Effekte dank seiner einzigartigen Modilationsmatrix. Ein geniales 24 dB Tiefpassfilter und ultraschnelle Hüllkurven. Der Pro One entspricht einer einzelnen Stimme des Prophet 5.
Die Geschichte dieses umgebauten Pro One:
Vor ca. 6 Jahren bekam ich den Hinweis, das jemand einen Pro One im Keller hat, den er verschenken möchte. Da wäre ein Glücksfall, also nichts wie hin. Nun ja, als ich den Pro One sah, konnte ich ihn kaum erkennen. Die Tastatur inkl. Platine fehlte, es war nur eine Poti Kappe vorhanden und das Gehäuse hatte einen Totalschaden. Trotzdem nahm ich ihn mit. In meinem Studio begann ich ihn vorsichtig zu zerlegen, und Oh Wunder, er funktionierte sogar. Daher beschloss den Pro One zu retten.
Ich baute mir ein Gehäuse aus Holz, öffnete und reinigte fast alle Potis mit Neutralöl. Besorgte mit neue Potikappen mit Filzunterlegscheiben. Ersetzte das für die Modulationsmatrix erforderliche Modulationswheel durch ein Poti (siehe auf den Fotos oben rechts in der Ecke). Bohrte Löcher ins Gehäuse, damit alle Trimpotis wie beim Original von oben zugänglich sind.
Seit dem verrichtete er als Expander seinen Dienst in meinem Studio.
Ergänzen möchte ich das aufgrund des fehlenden Tastatur Prozessors nicht alle Funktionen vorhanden sind:
Der interne Sequenzer funktioniert nicht
Der Arpeggiator funktioniert nicht
Rate ( Glide ) funktioniert nicht
Retrigger funktioniert nicht
CV & Gate Out funktioniert nicht
All diese nicht funktionieren Elemente sind keine Defekte, sondern werden normalerweise von dem Tasturprozessor angesteuert, der ja leider an der Tastatur hängt, welche nicht mehr da ist .
Da ich den Pro One über ein Midi/CV Interface angesteuert habe, ware diese Funktionen nie ein Verlust für mich.
2 Kleinigkeiten möchte ich nicht verschweigen:
Das OSC A Mixer Poti & das Pulse With OSc B sind leicht am Kratzen
Das Noise Signal ist wesentlich leiser als normal
Der Pro One ist 100% Oktavenrein. Wie aber bei allen Pro One muss man beim umschalten der Oktavwahlschalter ab und zu das Tuning der Osc mit dem Frequency Poti angleichen.
Die ca. Maße des Gehäuses:
B 645 x H 220 x T 112 mm” Link
“This Auction is for a Sequential Circuits Pro One Analog Synthesizer. The instrument is 100% fully functional and works perfectly. I just had it serviced by my tech – cleaned & calibrated. This thing sounds GREAT. The keyboard is the J-Wire type. Serial # 6806.
Having been used on many gigs since I acquired it in 1994, the wood panels are a bit worn, but cosmetically it’s in good shape. The one significant cosmetic issue is that in 2000, 2 of the pots had to be replaced due to broken shafts; they were replaced with superior parts, and the original knobs didn’t fit, so my tech put on new knobs. I still have one of the originals, which I will include. This in NO WAY affects the performance of the unit. If anything, it makes it better. Included is the manual (in a looseleaf binder) and said original knob.” Link
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