“1x Sequential Circuits Pro One Vintage Synthesiser

In good working order, just had a service

Rebushed j-wire keyboard, plays nice and keys are level

Couple small chips on the front panel which are purely cosmetic

Missing both name badges, which it has been since I got it.

All time classic mono synth from sequential circuits. essentially a single voice prophet – and too wonderful for any words to do it justice! It also is the model with a Tibetan Buddha and chant* stencilled on the circuit board, for extra good vibrations!” Click here to visit listing on eBay

“you are bidding on the synth pictured
from a private collection. has been sitting a long time
but in Great physical shape. all keys and functions are working well
some of the pots and switches and key contacts will need cleaning and normal service
I have not had this unit serviced, but will guarantee it to work as it should
faces up Very nicely as seen. wood sides are in very good shape.
dates to 1983. the keys are a bit clanky when triggered – I think they need a new felt strip inside
no major issues or problems” Click here to visit listing on eBay

“Up for auction is my Sequential Pro One vintage analog synth w/MIDI in near mint condition. It has the more desirable j-wire keybed which has been painstakingly refurbished.

What has been done:

MIDI kit installed. Simply connect a MIDI cable from your controller or sequencer to the MIDI IN jack. Hold the red button down to enter MIDI mode. Send the kit a MIDI note and it will respond on that channel from that point forward. A red LED above the pitch/mod wheels indicates whether or not it is receiving MIDI. CV/GATE can also be used.
Keyboard bushings replaced, bushings greased, j-wires polished, every key removed/cleaned/polished, and keybed painstakingly adjusted to perfection (both height and width). Each j-wire adjusted so that they hit the buss wire at the same time for more accurate keyboard response. Keyboard now plays like butter. I have extensive experience refurbishing pratt-reed keybeds and took extra care to make this synth play like a dream. This easily took 4-5 hours of painstaking work to complete.
Prophet-5 knobs with metal caps installed. Paint on caps is absolutely perfect, with no scratches.
Every knob removed and cleaned with a toothbrush to get all the dirt out of the cracks.
Wood panels removed, sanded, waxed, and hand-rubbed to bring out the grain.
Pitch/Mod wheel plastic replaced with NOS wheels from Wine Country. The old ones crack over time and can slip on the pots.
All pots and switches cleaned.
Power cord replaced with a much nicer panel mounted 3 prong IEC power receptacle. Makes it much easier to remove from a stand (power cable included).
Inside and outside of synth completely cleaned.
Synth voices calibrated and checked over for tuning stability up and down the keyboard.

I own two Pro-One’s, and this one sounds the best of the two. It stays in tune up and down the keyboard. Pots have been cleaned but a few might be scratchy. I will retest before shipping. Not sure why this one has such a nice rounded, thick character to it but I prefer the sound over my other Pro One. Physical condition is very clean, near mint. The wood panels have some nicks and dents here and there, and small holes where knots are in the wood. Every knob cap is pristine. Every knob has been cleaned. A few scratches on the front panel. See photos for details. Only selling to fund another purchase. I am very picky about my gear, and have refurbished this to as close to perfect condition as possible.” Click here to visit listing on eBay

” First class example of this iconic monophonic synthesizer.”
Click here to visit listing on eBay

Pro One, Sequential Circuits @ 21 February 2019, Comments Off on Sequential Circuits Pro One

“I’m selling this much loved piece of kit as it’s been under a dust sheet in my studio for the last 12 years and deserves some use. It’s been well looked after but hasn’t been used for some time. It’s never been gigged – studio use only. Before listing I fired it up for testing and it could do with a service but a spray of pot cleaner in the right places would probably do the job.

Supplied with the original manual in pristine condition!
The Pro Solo is a little bonus to help get to hooked up and started with the Pro One straight away.” Click here to visit listing on eBay

Pro One, Sequential Circuits @ 21 February 2019, Comments Off on Sequential Circuits Pro One

“The awesome Pro-One in great working order. No modifications. I am the original owner. Looks and sounds great.

This is the preferred J-wire model.

Recent restoration includes;

– 8 noisy potentiometers replaced with new ones.

– All new keyboard bushings.

– New power cord.

– New power switch and new fuse holder.

– All switches and potentiometers cleaned.

– Keyboard contacts cleaned like new.

A few extras are also included;

– Extra keyboard to circuit board cable that is extra-long.This is useful for servicing.

– Extra spare potentiometers included in case you need to replace any in the future.

– The original potentiometers that were replaced during servicing are also provided.

Original instruction book is also included.” Click here to visit listing on eBay

Pro One, Sequential Circuits @ 14 February 2019, Comments Off on Sequential Circuits Pro One

” One owner since new, bought in Leeds in the very early 80’s. It has never been gigged but used for music fun at home.

The pictures shown are of the actual Synthesizer.

Model 100 – serial no. 5193 – circa 1981
Number of keys: 37
Type: keyboard synthesizer
MPN: does not apply
Analogue/digital: analogue
Brand: sequential circuits

It is in working order, slight wear with the odd scuff and little scratches, other than that in good very condition.
Comes with the original cardboard box (however the box is not in good condition). ”
Click here to visit listing on eBay

Pro One, Sequential Circuits @ 07 February 2019, Comments Off on Sequential Circuits Pro One

“UNIT IS IN EXCELLENT VISUAL CONDITION AS SHOWN. ONE KEY SEEMS TO SIT A LITTLE LOWER THAN ALL THE OTHERS. UNIT POWERS UP, BUT I DO NOT KNOW ENOUGH TO TEST FUNCTIONS. THE GATE LIGHT COMES ON WHEN ALL THE KEYS ARE PRESSED. SELLING AS IS FOR PARTS. NOTE ONE OF THE WHEELS IS CRACKED. PREVIOUS OWNER SAID THEY TOOK IT TO A MUSIC STORE TO GET TESTED AND IT PASSED.” Click here to visit listing on eBay

Pro One, Sequential Circuits @ 31 January 2019, Comments Off on Sequential Circuits Pro One

“Sequential Circuits Pro One Keyboard Synthesizer. Condition is Used but in Very Good, working condition.” Click here to visit listing on eBay

Pro One, Sequential Circuits @ 31 January 2019, Comments Off on Sequential Circuits Pro One

“The awesome pro-One in great working order. No modifications. Recent restoration includes; 8 noisy potentiometers replaced with new ones, all new keyboard bushings, new power cord, new power switch, new fuse holder. All switches and potentiometers cleaned. Keyboard contacts cleaned like new.

Includes an extra keyboard to circuit board cable that is extra-long.This is useful for servicing.

Extra spare potentiometers included in case you need to replace any in the future.

This is a J-wire model.

Original instruction book is included.” Click here to visit listing on eBay

Pro One, Sequential Circuits @ 17 January 2019, Comments Off on Sequential Circuits Pro One

“For sale: Sequential Circuits Pro-One with beautiful wood case. Works perfectly and plays great.” Click here to visit listing on eBay

Pro One, Sequential Circuits @ 17 January 2019, Comments Off on Sequential Circuits Pro One

“As you can see it’s got some graffiti from the 80’s. I bought it in 82. The keyboard is a bit uneven in key height but all the keys work. All the knobs and everything works but it could probably use a cleaning.” Click here to visit listing on eBay

Pro One, Sequential Circuits @ 10 January 2019, Comments Off on Sequential Circuits Pro One

“For Sale. My beloved Pro One synth which I have owned from new. It has NEVER BEEN GIGGED and has spent it’s entire life flightcased or sitting in my studio. There are two small cosmetic scratches (shown in the pics) which don’t affect its performance in any way. Like all things of its age, it could do with a spray of pot cleaner (and I would recommend that the buyer does this), but is in full working order and sounds great. Extremely rare now and hard to find in this condition. If you love that fat analogue sound, get bidding and you wont be disappointed. ” Click here to visit listing on eBay

Pro One, Sequential Circuits @ 03 January 2019, Comments Off on Sequential Circuits Pro One

“SEQUENTIAL CIRCUITS PRO ONE SYNTHESIZER
SERVICED AND TESTED BY THE ANALOG LAB IN EARLY 2017
NOT USED SINCE.
VINTAGE SYNTHESIZER
MODEL 100 – YEAR 1981
MONOGRAPHIC VERSION OF PROPHET-5
MODULATION IS FULFILLING
POSSIBLE TO CREATE A VARIETY OF SOUNDS.
SIMPLE SEQUENCER
ARPEGGIATOR LOADED
COMPACT-WEIGHS approx15 LBS
22 WHITE KEYS
15 BLACK KEYS
NO BOOKLET OR INSTRUCTIONS , NO CASE” Click here to visit listing on eBay

Pro One, Sequential Circuits @ 29 November 2018, Comments Off on Sequential Circuits Pro One

“Sequential Circuits Pro One , in fantastic condition. J-wire edition and serviced in December 2017 by James Walker at Synth Repair.

Well looked after in a smoke free studio.” Click here to visit listing on eBay

Pro One, Sequential Circuits @ 22 November 2018, Comments Off on Sequential Circuits Pro One

“The sequential Pro-One is one of the most desirable analog mono-synths out there. This is a great find for someone who likes well-cared for synths that work as they should and look great. This unit has lighted, aftermarket, pitch/mod wheels in addition to the wood upgrade.” Click here to visit listing on eBay

Pro One, Sequential Circuits @ 08 November 2018, Comments Off on Sequential Circuits Pro One

“First class condition example of this iconic synthesizer.” Click here to visit listing on eBay

Pro One, Sequential Circuits @ 01 November 2018, Comments Off on Sequential Circuits Pro One

“Very recently serviced (30 days ago by SD Machines in Miami) Sequential Pro-One with case and owner’s manual. Everything works. In very good condition. It has a new transformer, new power switch, all keyboard contacts have been cleaned, new bushings, all keys aligned and calibrated. There is a chip in the paint next to the LFO amount knob (see picture). The Modulation wheel broke in two and has been glued together (see picture) The inner foam of the case is not the original one (see picture)” Click here to visit listing on eBay

Pro One, Sequential Circuits @ 18 October 2018, Comments Off on Sequential Circuits Pro One

“Up for sale is a highly modded and amazingly cool Sequential Circuits Pro One.

This synth is modded. Keyboard is an entirely rebuilt J wire keyed… not the horrible membrane version. The serial of this synth lands in the membrane keybed version but a J wire keyed was overhauled and installed. It plays and tracks extremely well. No double triggers or mis-triggers. It also has an aftertouch strip put in. The key dip is just a tiny little bit less, and there is a pic showing that. The keys goes down a little more when you activate the aftertouch. Very light and quick action. The aftertouch controls many things. Pitch up and down, modulation, LFO, Filter, etc…Very flexible variations. Also there are two pots inside the synth for gain functions for the aftertouch if needed. There is an additional LFO pot added , and there is duel portamento pots for the two VCO’s . Very effective on glides rather than the stock single portamento . Also a momentary jack in the back for on/ off portamento. Again a very effective performance feature. Tested , and everything works as should. In tune and calibrated. Ground loop issue corrected, which was common for these keyboards. Condition is good. There are a few marks on plastic and some marks on the keys. But its all minor… jut=st stating for full discloure on this ad. The only thing to note is that the Master Tune pot shaft has the tip broken off. You can still easily use / adjust it. With all the mods completed, this takes the Pro One to a whole new level. Ive created some very wicked efx, basses, leads that simply cant be done on a regular pro one. GREAT synth, great condition, great price. ” Click here to visit listing on eBay

Pro One, Sequential Circuits @ 04 October 2018, Comments Off on Sequential Circuits Pro One

“Vintage Sequential Circuits Pro One Analog Synthesizer in great condition. Legendary synth used by everyone from Depeche Mode and New Order to Prince.” Click here to visit listing on eBay

Pro One, Sequential Circuits @ 04 October 2018, Comments Off on Sequential Circuits Pro One

“SEQUENTIAL CIRCUITS PRO ONE SYNTHESIZER
SERVICED AND TESTED BY THE ANALOG LAB IN EARLY 2017
NOT USED SINCE.
VINTAGE SYNTHESIZER
MODEL 100 – YEAR 1981
MONOGRAPHIC VERSION OF PROPHET-5
MODULATION IS FULFILLING
POSSIBLE TO CREATE A VARIETY OF SOUNDS.
SIMPLE SEQUENCER
ARPEGGIATOR LOADED”
Click here to visit listing on eBay

Pro One, Sequential Circuits @ 27 September 2018, Comments Off on Sequential Circuits Pro One

“Sequential Circuits Pro One Analog Monophonic Synthesizer Fatar Keybed Turbo CPU MIDI

I’m selling my beautiful Pro One.

I’ve modified it with the Turbo CPU Midi Upgrade and I’ve installed a new Fatar keybed so you don’t have to worry about failing membranes or adjusting j-wires.

With the new keybed it plays and feels like a brand new modern synth.

It’s the same keybed that is installed on most modern Moog synthesizers.

The connections are identical to the Moog Little Phatty keybed.

The midi upgrade is a nice improvement.” Click here to visit listing on eBay

Pro One, Sequential Circuits @ 13 September 2018, Comments Off on Sequential Circuits Pro One

“Sequential Circuits Pro One

– analoger Synthesizer Klassiker –
– einer der vielseitigsten Mono-Synths überhaupt –

Der Pro One ist in sehr gutem Zustand!

Top Zustand! neueste Revision (mit J-Wire Kontakten) Die Tastatur spielt sich gut! Das ist eher eine Seltenheit, da die meisten älteren Revisionen schlechtere Tastaturen haben!

Dieser analoge Synthesizer ist seit den 80er Jahren beliebt bei Produzenten und Livekünstlern gleichermassen! Er liefert dicken Soud (Bass, Leads und Seq.&more), der in so einer Form auf digitalem Wege nicht nachzuemulieren ist. Ein Urgestein elektronischer Musik, dass an Liebhabern gewinnt! Extremer Seltenheitswert und Preissteigerung. Dieses Exemplar liefert eien besonders eigenen Klang. ”

Click here to visit listing on eBay

Pro One, Sequential Circuits @ 13 September 2018, Comments Off on Sequential Circuits Pro One

“1982 Sequential Circuits ProOne Vintage Analog Synthesizer

Serviced and Tested by authorized repair center in early 2018

Model 100 – 1982

Serial Number# 100-9082

Monophonic

Full modulation range

Wide range of sound bank variations

Simple Sequencer and Arpeggiator

Compact – approx weight is 14 LBS

22 White Keys / 15 Black Keys

Original Operation Manual included (8 Chapters total with schematics for patch sounds)” Click here to visit listing on eBay

Pro One, Sequential Circuits @ 23 August 2018, Comments Off on Sequential Circuits Pro One

“you are bidding on the synthesizer pictured
Very clean shape – includes wood sides that are in very good shape as well
the unit powers on and all the keys are working
most all functions appear to be working and change the sounds
this is an older unit and will need to be cleaned and serviced but most everything seems to be
working fine. some scratchy pots. Control panel is super clean. no damage or major scratches
no missing knobs. Pitch / Mod wheels working” Click here to visit listing on eBay

Pro One, Sequential Circuits @ 23 August 2018, Comments Off on Sequential Circuits Pro One

” This instrument has been serviced and cleaned all fully working.” Click here to visit listing on eBay

Pro One, Sequential Circuits @ 23 August 2018, Comments Off on Sequential Circuits Pro One

” The synth has been taken apart, refurbished and cleaned. Some old electrolytic/tantalum capacitors has been replaced and a busted IC-chip as well so now the machine is good as new again.

A true classic analog synthesizer. 110V unit so you might need a step down transformer in countries with different current. Comes with owners manual and well boxed.” Click here to visit listing on eBay

Pro One, Sequential Circuits @ 09 August 2018, Comments Off on Sequential Circuits Pro One

“Inside the base plate is signed ‘Julia 12-16-81’, so I probably bought it (new) in early ’82. I’ve only used it at home and it’s been stored in the loft for some years.” Click here to visit listing on eBay

Pro One, Sequential Circuits @ 09 August 2018, Comments Off on Sequnetial Circuits Pro One

“So, I impulsively purchased a MiniMoog recently so I have to let this PRO1 go.

This is serial number 626 and, as you can see in the pics, it is in absolutely pristine condition. No scratchy pots, nothing but phat, pure analog sound.

This is one of the best vintage analog synths out there! ” Click here to visit listing on eBay

Pro One, Sequential Circuits @ 02 August 2018, Comments Off on Sequential Circuits Pro One

“Excellent condition, some keys not triggering which I am not gonna have time to sort out. Imagine a service will be about £100 .

Sold as seen.

It’s collecting dust.” Click here to visit listing on eBay

Pro One, Sequential Circuits @ 02 August 2018, Comments Off on Sequential Circuits Pro One

“Here we have for sale a Sequential Circuits Pro One monophonic analog synthesizer. It has been fully dissasembled, the key contacts, busbar, switches and controls have been cleaned. The power supply has been recapped with nichicon high temp capacitors, and some mismatched hardware has been replaced. It is dated 1981 low serial number with true key contacts. All ins and outs have been tested and are deemed to be working. There are blemishes on some keys and the wood sides, but overall considering the age, it is in very good shape. It will be double boxed and packed securely.” Click here to visit listing on eBay

Pro One, Sequential Circuits @ 12 July 2018, Comments Off on Sequential Circuits Pro One

“Nice condition not mint but very good. J wire low serial with chassis mounted psu. I’ve owned it for several years and it’s been regularly serviced I had the power cord removed and a kettle lead put in its place much safer and easier to move around. I also had the keyboard bushings replaced about two years ago as the keyboard was shocking plays nicely now. The pro one badge came off in the studio and is unfortunately now lost but they are readily available on Facebook if you feel you need it. I’ve recorded with it gigged with it and it’s never once let me down. It can be a bit picky with power as in it likes an nice clean supply, if you have a pc or laptop running on the same circuit the analog oscillators will create hum, this is a common thing with a lot of vintage synths it also likes a good 10 or 15 mins to warm up. I will be really sorry to see it go but it’s just not getting the use these days and I’m a player not a collector. ”
Click here to visit listing on eBay

Pro One, Sequential Circuits @ 12 July 2018, Comments Off on Sequential Circuits Pro One Project Machine

“Used with scratches and scuffs. For parts/repair only. Powers on. Tones can be heard but there is heavy static.” Click here to visit listing on eBay

Pro One, Sequential Circuits @ 28 June 2018, Comments Off on Sequential Circuits Pro One

“Sequential Circuits Pro One analogue synthesizer – restoration project

All keys, dials and switches present. Woodenside panels, main body and branding stickers all in good condition.

Serial number 100-1795. This is the more desirable J-wirekeybed model (as opposed to the less reliable membrane keybed on serial numbers8500 and above), also with the power supply mounted to the chassis (as opposed to thepower supply mounted to the circuit board leading to breaks on serial numbers1500 and below).

Most dials and switches alter the sound that isproduced but this keyboard needs repair / calibration and a full service to getit back to working order. Keys 25-32, 35 and 37 are not responding. ”
Click here to visit listing on eBay

Pro One, Sequential Circuits @ 28 June 2018, Comments Off on Sequential Circuits Pro One

“Sequential Circuits Pro One Synthesizer – Serial No : 100-8249
On/Off Power Switch faulty so no power at the moment, therefore unable to check functions.
Used
Sold as seen
Buyer to collect.” Click here to visit listing on eBay