“Working when I last used it two months ago, but being sold AS IS as this is a vintage item. Will include 15ft. MIDI cable” Link

“Vintage Sequential Circuits Prophet 2000 Synthesizer Keyboard

Great Condition, Everything functions as should, does not come with any floppy disks. Just got checked out and was given a clean bill of health.” Link

“This is a used Sequential circuits prophet 5 rev 3 (serial above) . I am the second owner of this synth , both owners kept in clean smoke free studio . Never gigged with . The synth is in excellent condition , especially consider its age . In great working order . Minor issues : missing one knob on source mix pot which is pictured , easily replaced . Other issue is one key will trigger twice at beginning of usage . However as you earn her up she sounds amazing and continues to get warner and warmer . This is a rare opportunity to own one of the most iconic synths ever created . Only thousands exist in the world. She has been very good to me and now its time to let her go to a new home for new creations . ”
Link

“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

“I’m unfortunatley selling this keyboard due to my current life circumstance, as im going travelling for a long period of time. I would love to pass this synth on to someone who will make the most out of this beautiful machine. I’m very saddened to part from this beauty, although i hope for somebody to continue making amazing music with it…. as its done for me 🙂 xoxo

Fully serviced and Working perfect, Great condition. Very easy to use, even if you’re a beginner
in my opinion no need for extra controllers to simplify the synth.

p.s. I must mention this has been used in some great sessions, with some A-list muscians at metropolis studio London…. Rhianna, Adele e.g
also left on the machine are some gems, really great presets (over 60+) which were edited and used by some top industry musicians.” Link

“Up for sale is our Sequential Circuits SPLIT EIGHT analog synth. This is the big brother to the Six Trak and MultiTrak classic synths. It has the ability to stack or split two sounds for big analog goodness. It is loaded with custom patches for our studio… lots of great pads, efx, leads, basses and more. I left the last 2 banks blank for your programming additions! This piece sounds huge… great addition to any stage or studio that needs TRUE classic analog goodness. It works great… All buttons and keys work. I could not get midi to transmit but i think its something im not doing in the settings, otherwise this piece is ready for your music! Due to age and vintage analog era technology, sold as is.” Link

“Vintage 1980s Sequential Circuits TOM Digital Drum Machine Beatbox Model 420

I played around with it and it seems to work. I plugged it into an amp and all of the bottoms worked and it made sounds. The “claps” option seemed slow to respond so the pot may need to be cleaned. Did not investigate further or advanced features but one should assume that this may need a tune up and should be purchased with that understanding.

The power cord has electrical tape around the plugin to the unit. Works though.

Very Rare and interesting piece of equipment.

See Pictures” Link

“I bought this keyboard back in the late 80’s and stopped using it shortly after college. It’s been sitting underneath a sheet at my parent’s house for the past 25 years – they’re cleaning out the house so it’s time to get rid of my old gear…

The Sequential Circuits MultiTrak is an underrated and somewhat rare analog synth. It has an onboard arpeggiator and sequencer as well as MIDI. The unit is in very good condition with the exception of some scratches on the bottom. This is a great sounding synth and everything works as it should.

The internal lithium battery that maintains the patches was replaced just a couple of weeks ago and I restored the patches I had using the tape interface. I couldn’t find a factory patch WAV online, but you can find MIDI SysEx dumps online and the Owner’s Manual contains settings for the original factory sounds.

Power supply is included, as well as copies of the Owner’s Manual, MIDI Guide, and Technical Manual (purchased from Wine Country Productions back in the day)” 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

“I bought this keyboard back in the late 80’s and stopped using it shortly after college. It’s been sitting underneath a sheet at my parent’s house for the past 25 years – they’re cleaning out the house so it’s time to get rid of my old gear…

The Sequential Circuits MultiTrak is an underrated and somewhat rare analog synth. It has an onboard arpeggiator and sequencer as well as MIDI. The unit is in very good condition with the exception of some scratches on the bottom. This is a great sounding synth and everything works as it should.

The internal lithium battery that maintains the patches was replaced just a couple of weeks ago and I restored the patches I had using the tape interface. I couldn’t find a factory patch WAV online, but you can find MIDI SysEx dumps online and the Owner’s Manual contains settings for the original factory sounds.

Power supply is included, as well as copies of the Owner’s Manual, MIDI Guide, and Technical Manual (purchased from Wine Country Productions back in the day)” Link

“Works perfectly well! In great condition! Was professionally serviced and tested not long ago!” Link

p600 ” Unit in excellent shape. Plays well hardly no scratches on it. Bought it new in 1983.
Has two minor issues with it as you can see in the invoice worth of over $900 worth of work done on it. The number two on the key pad is not working at the moment so any program with a two in it will not come up. All the other programs plays fine. It also comes with a gator gig bag that it fits in.
Serial # 4631″ 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

Prophet 600, Sequential Circuits @ 11 May 2017, Comments Off on Sequential Circuits Prophet 600

“I purchased this keyboard ages ago for a project, I just grabbed it out of storage. It powers up, and plays the presets, however about 12 of the keys are not firing. I have seen tutorials online for cleaning the contacts, but it’s just not something I’m interested in doing. It is also missing a speed knob. As is.”” Link

Prophet 5, Sequential Circuits @ 11 May 2017, Comments Off on Sequential Circuits Prophet 5 Rev 3.3

“Great condition and fully functional. This went to one of the best sequential circuit techs last year. It sounds amazing. ” 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

Sequential Circuits, Six-Trak @ 04 May 2017, Comments Off on Sequential Circuits Six-Trak

“Lovely analog synth. Almost museum quality as far as appearance is concerned with a couple of marks on the side woodwork.

Whatever anyone says about soft synths, there’s something about real warm vintage analog synths! There’s a warmth that digital synths just can’t do. See http://www. flitemedia .com /studio /sci-sixtrak/

Built with 48 velocity-sensitive keys and the same Curtis circuitry found in the company’s more expensive models, the Six-Trak boasts six voice polyphony and six VCOs for solid lead, bass, and pad modeling. Only issue is that the volume goes up to 9.5 or so then back to 0. Doesn’t affect me as my amp goes to 11!!” Link

Prophet 600, Sequential Circuits @ 04 May 2017, Comments Off on Sequential Circuits Prophet 600

“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. Collection only on this as there is no case and not prepared to shove in a box and wave it goodbye!” Link

Drumtraks, Sequential Circuits @ 04 May 2017, Comments Off on Sequential Circuits Drumtraks

“Up to sale is my sci drumtraks, I bought this unit not function and repaired it to full working order.

Both Cem 3320 VCF chips have been replaced

New battery

Restored Eproms back to original settings.

Dusted internals

Calibrated power supply

Comes with two extra EPROMs 1x alternate bass drum and 1x electronic toms

The only two issues that I didn’t get around to servicing because they didn’t bother me was the volume pot a little bit scratchy if moved and one of the buttons has its border missing, purely cosmetic, including a few surface scratches as shown in the picture.

I am not turning a profit on this unit and the price doesn’t include my time for restoring, so starting the bid at cost price for parts and original unit.”
Link

Model 800, Sequential Circuits @ 04 May 2017, Comments Off on Sequential Circuits Model 800 Sequencer

“Vintage Sequential Circuits model 800 sequencer..all original and in good working order.all lights,switches.knobs and display work as they should..low serial number 071….very rare and made by Dave Smith as the very first product offered by sequential circuits…some slight wear and a few tiny scuffs..some oxidation on a few of the case screws but nothing very noticeable or major…It’s 40 Years Old! will include a copy of the original hard to find manual as well.” 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

Prophet T8, Sequential Circuits @ 27 April 2017, Comments Off on Sequential Circuits Prophet T8

pt8 “This here is rare and amazing synth. Prophet T8 in GREAT condition!!! 9/10. This synth has after touch, midi, 8 oscillators (opposed to the P5’s 5 oscillators)… The ability to stack patches makes this synth a gnarly Prophet 5 on crack.!!! it also can come up with some very interesting sounds of its own. Down fall is that it’s huge, and old, you wouldn’t want to gig with this. It is a studio synth. Kept in a smoke free studio. Dope, Rare synth. Local pick up welcome! And I will ship. ” Link

Prophet VS, Sequential Circuits @ 27 April 2017, Comments Off on Sequential Circuits Prophet VS

“Selling one of my Prophet VS synths. It’s in lovely condition and sounds beautiful. It will be packaged safely with special care given to the joystick. There’s really no other synth like it. ” Link

Model 800, Sequential Circuits @ 27 April 2017, Comments Off on Sequential Circuits Model 800


This is an extremely rare and amazingly intuitive sequencer. It belongs with someone who will use it more than i do. It’s one of the finest Cv/Gate sequencers ever made due to it’s logical layout and improvisational capabilities. More on that later…

There were only around 500 made, and they were hand made by Dave Smith himself. He started his entire company Sequential Circuits based on this round of sequencer sales, which then provided his business foundation for developing the Prophet 5 and other major musical instrument milestones .

And what’s more is that of the 500, only the first 50 or so had the capability of working with both V/Octave standard AND Hz/V standard. This is one of them. It is serial number 0041, and presumably this capability was more expensive due to the pricier D/A conversion necessary for the higher resolution.

AND, what’s even more, is that this is one of a small handful that had a mod done to the unit (by Dave Smith) that allows for musical rests to be placed between notes. One can add as many single beat rests as any sequence can fit.” Link

Sequential Circuits, Six-Trak @ 27 April 2017, Comments Off on Sequential Circuits Six-Trak


Features of this Six-Trak:

• Excellent physical condition minus a few knicks on the case

• Lived in non-smoking, loving home for 30+ years

• Recently professionally cleaned all pots, wheels, and reconditioned all buttons and keyboard contacts, resulting in like-new operation

• Completely Functional: All buttons and keys work, all pots work cleanly, and it sounds deep, rich and yummy as an analog synth should

• Includes original Sequential box!” Link

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

model500 “Sequential circuits Pro FX Model 500. A very early Digital Analog hybrid effects unit specifically made for your CV analog / modular Synth. This is a quality machine. Very few of these were made. Extremely rare. It’s in excellent cosmetic condition. No dings, dents or serious cosmetic wear at all. The face is in beautiful shape. There’s light scuffs on the top edge and a light blemish on the back as seen in photos. Lightly used and very well cared for!

It powers up and passes a signal but the effects aren’t working as they should. All LEDs and lights work. All buttons and knobs are in great shape and trigger the digital LED / appropriate lights perfectly but as for any 40-year-old vintage analog gear, this will need to be serviced and is being sold AS IS. If you have any questions, please feel free to ask. This will be packed with extreme care and shipped immediately upon payment received.” 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

Prophet 600, Sequential Circuits @ 20 April 2017, Comments Off on Sequential Circuits Prophet 600

p600 “This item listed is a Prophet 600 Sequential Circuits synthesizer. This item works perfectly. I used this in my personal studio and it sounds amazing.” Link

Drumtraks, Sequential Circuits @ 13 April 2017, Comments Off on Sequential Circuits Drumtraks

dt “Classic Drum machine from the 80s.

Can Be Synced via midi

Separate outs all working.

240v U.K. Plug type as seen in pic 3

Please note everything is working except, the clap button is stuck in(see pic 2) and doesn’t trigger via the pad! still functions via midi though. Not sure how easy this is to fix hence the cheaper price to others listed on eBay.” Link

Prophet 2000, Sequential Circuits @ 13 April 2017, Comments Off on Sequential Circuits Prophet 2000 Project Machine

p2k “Water damaged Prophet 2000 sampler.

Keyboard has top C broken.

Extent of damage unknown, but would be useful for parts etc., or a restoration project.

Sound generation is digital (Sampler), but the envelopes, amplifiers and filter are all analogue.

Contains 8 x CEM3379 chips

History of this particular synth is unknown, it came to me last year.

Clearing out the workshop in preperation for a move hence the sale.” Link

Prophet 600, Sequential Circuits @ 13 April 2017, Comments Off on Sequential Circuits Prophet 600

p_600 ” Selling the Prophet 600. Couple of surface problems, shown in pics… the wooden box on the side is missing a small wedge from the top, the 16th key from the left is chipped, the 13th black key has a nick, and some of the metal on the back has surface scratches in the paint. I think all of that is is pictured. I do not have the original power cord.
Otherwise, it appears to work perfectly. All the buttons and switches seem to be in place and sturdy. It sounds great, and has a board of numbers and ancient symbols for you deciphering enjoyment.
It is an ‘as is’ purchase, and shipping is on you.” Link

Sequential Circuits, Six-Trak @ 13 April 2017, Comments Off on Sequential Circuits Six Trak

6t “Up for sale is a Vintage Sequential Circuits Six Trak Analog Synthesizer with Manual and Original Box. This synthesizer has been tested and tuned professionally verifying all functions of the unit are properly working. Model: 610 Serial # 610-000499. Dated from 1983 based on the publication of the operation manual. The operation manual has instrument instruction as well as a wiring diagram and play sheets all unused. If you never heard what one sounds like you will be impressed at the quality and unique sound that this instrument creates. Also included is a Sequential Circuits brochure.

Condition Issues: Wood cabinet shows minor blems on edges. Operation manual shows storage wear from being folded inside of box. Original box and foam packaging show storage wear but intact.” 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