“It is in nearly great condition as you can see from the photos. Comes with two original disks, a handful of custom disks of my own, and digital copies of dozens of disk images. This particular sampler has had the 512K memory upgrade installed. There is a software editor available online.

Schematic and service manuals are available as PDFs, however this unit is in perfect working order – checked it out yesterday.

I believe this sampler is a hidden gem, sounds just as good if not better compared with EMU Emulator II. Feature and sound-wise one of the best designed samplers and sound quality. It also has a very nice MIDI arpeggiator that is unique. Leave it to Dave Smith for the ingenuity of this beast.” Link

“Up for auction is a Sequential Circuits Six-Trak vintage analog synthesizer. This model is notable for being one of the first multi-timbral synths, equipped with MIDI and an on-board six-track digital sequencer. The unit is fully functional with one exception; track 5 does not work. Everything else on the synth is good. Physically it’s in good shape, with a repaired crack in the wood (see pics). Other than that it just has a few minor cosmetic marks here and there, typical of a 30 year old used piece of gear. ” Link

“Selling a rare Sequential Circuits Prophet VS Digital Vector Synthesizer. In very good condittion..” Link

“The unit is working but selling as is for parts, refurbishing. All keys and functions seem to be working. I did not check the midi ports. The on/off switch works but is incredibly hard to turn on/off. It appears someone replaced the audio out jack. It is missing one knob for speed and shows wear, notably some rust, a chip in the wood on one side, and upon close inspection the black keys on the left of the board are chipped in the back (where you can’t see) where there should be full “hooks” if you will that prevent the black keys from sliding or popping out of place. They are seated fine and don’t move at all but if they were pulled on they would dislodge-it’s easy to put them back and again, they are in place firmly and all work just fine. Rubber of the power cord at exit in back is frayed but internal wiring appears ok and provides power but power cord might need replaced. Overall cosmetics aren’t great but seems the electronics are good. Selling as is for parts, repair or refurbishing. (I’ll try to put up a video tomorrow so you can hear it).” Link

“Description: . comes as seen. Classic Vintage Synthesizer. see pictures. Please see all pictures. dated on the inside 1984. all original and unmodified except for the red chicken head track volume knob.

Condition: Great shape. some minor scuffs and light wear only. no damage or issues. tested and working good. No Issues. ” Link

“Sequential Circuits Drumtraks vintage drum machine (UNTESTED). Item turns on, all buttons push in and return as designed, all knobs turn as designed, lights on the face turn on as seen in the pictures. Item has not has anything plugged in to it to ensure it makes the correct sounds which is why it is listed as parts not working and untested. Exterior is dusty but has no major damage to it.” Link

“Up for auction is a sequential circuits prophet T8 polyphonic analog synthesizer keyboard parts/ repair as is. I’m going to attempt to list all the things that are functioning/ not functioning. This keyboard probably needs a few thousand dollars to get it up and running.

Pieces that are missing/ not functioning :

5 screws in the back

22 knobs

The original pot on the frequency knob on the Lfo – mod section. It does have another pot on their at the moment, that does work… Its just not the original pot.

The switch on the freq A on the Lfo – mod section doesn’t turn on. Let me rephrase this, it turns on if it is included on a certain preset. But it doesn’t switch on.

Keys:

The first four keys on the lowest octave are warped and stuck together.

53 out 76 keys work

When you plug in a midi keyboard all the keys work great

What works:

The sequencer

The presets have been currently installed

All the keys work via midi

The after touch

All eight voices are working

all of the knobs and switches work except for the frequency A switch on the Lfo mod

The tuning button works

Modifications/ Repairs

I painted/ stained all the wood on the sides on the front and in the middle of the keyboard.

I painted the top portion of the Prophet black

I replaced two of the Voice chips

I replaced the internal battery and I installed all the factory sounds” Link

“I am selling the amazing and beloved Sequential Circuits Six-Trak. I have owned this Synth for about 2 years and have upgraded various areas of the Synth. Despite some minor cosmetic scuff marks due to its age, this Six-Trak is in pretty good shape. The right wooden side panel is broken and is something that can be fixed easily by applying some wood clue or by buying new wooden side panels for only $60 on “gmusynth” Some of the key features for my particular version of the Synth are.

1. Multiple Outs! This synth was modded so that all voices have their own output on the back. (AWESOME!)
2. I recently upgraded the Firmware from v9 to the latest version from tauntek v14.
3. Fixed some of the broken keys, (cosmetics)
4. Bought a new knob cap for the main volume knob (which I haven’t attached yet because the new knob cap needs to be modified, cosmetics)

You can read up on the new firmware version by googling tauntek SixTrackBug. This firmware version fixes a lot of the parameter issues with previous versions and adds some new features.” Link

“Selling our Prophet 2000 Keyboard sampler. It has the maximized 512K memory and an upgraded hard drive. It functions perfectly and is in great condition. Has a few marks on the surface but minimal wear for its age. Comes with an SKB I Series waterproof case.

We have made awesome sounds with this. For any questions we’ve been in touch with the people at Sequential Circuits and they’ve always helped us with the programming.

The Prophet has analog VCF’s and VCA’s which give you analog tweak-control over the sounds you sample. It has 8 voices of polyphony, the keyboard can be split into 8 layers, MIDI equipped, and there is an arpeggiator.”
Link

“I bought it in the late 1980s in San Jose, California when I lived in San Jose. I had the pads redone by the company owner in San Jose.
Original manual included, approximately 40 ORIGINAL DISCS INCLUDED.” Link

“Hello! I’m selling a Vintage Sequential Circuits Six Trak Analog Synthesizer. This synthesizer has been tested, played, and turned on in order to verifiy that everyone works perfectly. From 1983, this vintage keyboard makes beautiful sounds when considering it’s age.” Link

“SEQUENTIAL CIRCUITS PRO ONE – MIND CONDITION – JWIRE KEYS

Benutzung der Tastatur auch bei gestecktem CV/Gate möglich !

Nichtraucher – Netzkabel anbei !” Link

“All internal chips are missing

You are bidding on a Sequential Circuits Prophet 600

This unit is for spares or repair

It will need major work to restore but is reflected in the price” Link


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

Prophet VS, Sequential Circuits @ 07 September 2017, Comments Off on Sequential Circuits Prophet VS

” Very rare item, reluctant sell due to moving and i have 16 keyboards and this particular synth in rack format. Never taken on the road, home studio use only. All buttons and knobs are original and working. Needs new battery for memory back up. Under $20 on eBay and easy install. Comes with very rare factory VSROM card #3 with 100 extra sounds. Nothing sounds like this synth. Strings are so lush and a very unique texture and stereo vectoring is awesome. Missing a couple case screws, a little paint wear from moving from stand to instrument closet over the years. Otherwise in xlnt shape for its age. If your looking for that sonic edge in your productions this is the vintage synth for you. PS… it comes with original owners manual too. ” Link

Prophet 600, Sequential Circuits @ 07 September 2017, Comments Off on Sequential Circuits Prophet 600

“SCI Prophet 600 upgraded to the new Gligli firmware, which increases the resolution and smoothness of various functions (especially filters), adds massive extra options and flexibility. I purchased this from a music store 6-7 years ago and it has become by far my favorite keyboard. I installed the Gligli update this year and while I love it, I have decided to sell most of my keyboards since I don’t get to play much anymore. Comes with hard plastic Yamaha case, modded to fit the Prophet 600. It also includes a power cable and the original Z80A processor, which is in the Teensy box with its documentation. Stand not included.

The unit is in excellent condition, save a few minor scratches a little tape residue on the back (probably comes clean but I never tried). Check the linked You Tube video to verify that all switches and knobs function. It is mostly loaded with the original factory presets since I haven’t played much since I installed the upgrade.” Link

Pro One, Sequential Circuits @ 07 September 2017, Comments Off on Sequential Circuits Pro One

“Verkaufe eine Sequential Circuits Pro One mi eingebautes midi.
Es gibt ein schalter für mdi on/off.
Midi ist Kanal 15.” Link

Pro One, Sequential Circuits @ 07 September 2017, Comments Off on Sequential Circuits Pro One

“Bought 30 years ago, used as a teen then stored. Much loved. Great condition, working order. Under 8500 serial number and above 1500” Link

Sequential Circuits, Six-Trak @ 07 September 2017, Comments Off on Sequential Circuits Six-Trak

“Used and in full working order from a smoke free studio. Selling due to recent upgrades. Great little synth. No original box or manual I’m afraid. Item will be well packaged.” Link

Prophet 600, Sequential Circuits @ 31 August 2017, Comments Off on Sequential Circuits Prophet 600

“The synth is in very good condition as per the pictures. The front panel and rear panel are very clean with some minor blemishes. In some areas, the paint has been knocked off and this was touched up with a black marker by a previous owner. The membrane is also in great condition.

All knobs, buttons and switches are present and work properly. The keys are clean and fully functional, but are a bit ‘clacky’ like most 600’s. They might benefit from a little lubrication.

Functionality
The previous owner told me that the synth sometimes had erratic behaviour, with some parameters glitching-out occasionally. Since I’ve owned it, I have not experienced any of this behaviour myself but I’ve not spent a huge amount of time with it. I expect it could have been due to the Z80 CPU chip not being seated properly, which I’ve reseated. You’re welcome to come and try the synth at my house and find out for yourself.

An adaptor has been installed under the Z80 CPU so that it can easily be removed from the board without having to desolder it. In addition, a Teensy++ chip with the GliGli mod was provided to me, but I have not been able to successfully install the updated firmware. When I have tried to install it, the greeting message correctly displays and some secondary functions work, but when a key is pressed the synth then switches off.

I’ve spoken with the creator of the mod, and he indicated that the issue was likely due to either my (cheap) MIDI interface not correctly transmitting SYSEX correctly (only partial transfer of the firmware), or poor soldering on the chip itself. Both of these should be easy to solve, but I haven’t got the time to try these and I’m about to move house.” Link

Pro One, Sequential Circuits @ 31 August 2017, Comments Off on Sequential Circuits Pro One

“Here we have a Sequential Circuits Pro-One Monophonic synthesizer, a rare Vintage 80s Analog synthesizer made between 1981-1984

It has been cared for in a smoke-free studio environment and never gigged (by me). Cosmetically it is a 9/10, everything looks fantastic.

Functionally it is an 8/10, everything works and sounds great but most of the pots and switches are crackly and need to be cleaned.

Once you dial in a value it’s fine, it’s only when turning/switching you hear some crackling. (some cleaning of the potentiometers/switches should take care of this.)
I also just had the bushings changed out before listing it, and one key is a little higher than the others (see pic) but this doesn’t affect its playability at all.
I hate to part with this one, it just sounds incredible, but I need to sell it so my loss is your gain, low starting bid and a short auction so don’t wait!” Link

Pro One, Sequential Circuits @ 24 August 2017, Comments Off on Sequential Circuits Pro One

“80s iconic,classic synthesiser as used by Prince,New Order and more.Recently restored and serviced by a reputable
syth company.J wire version.In good condition considering age” Link

Pro One, Sequential Circuits @ 24 August 2017, Comments Off on Sequential Circuits Pro One

“Verkaufe eine Sequential Circuits Pro One mi eingebautes midi.
Es gibt ein schalter für mdi on/off.
Midi ist Kanal 15.” Link

Sequential Circuits, Six-Trak @ 24 August 2017, Comments Off on Sequential Circuits Six Trak

“A Vintage Sequential Circuits Six-Trak Analog Synthesizer with Operation Manual. Synthesizer receives power, and to my knowledge, works properly. 49 keys. Model: 610 Serial # 610-003276. 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. A little bit of writing on the Factory Program List page.

The wood cabinet shows very minor blemishes on right edge, and a chip on the cabinet on the left side (see pics). Does not affect play.

Please see images to qualify the condition of the item.

The synthesizer will be properly packaged and shipped via USPS.

I bought this synthesizer nearly 10-15 years ago, and have barely used it. Time to get it to someone who will.” Link

Sequential Circuits, Six-Trak @ 24 August 2017, Comments Off on Sequential Circuits Six Trak

“Up for auction is a Sequential Circuits Six-Trak vintage analog synthesizer. This model is notable for being one of the first multi-timbral synths, equipped with MIDI and an on-board six-track digital sequencer. The unit is fully functional with one exception; track 5 does not work. Everything else on the synth is good. Physically it’s in good shape, with a repaired crack in the wood (see pics). Other than that it just has a few minor cosmetic marks here and there, typical of a 30 year old used piece of gear.” Link

MultiTrak, Sequential Circuits @ 17 August 2017, Comments Off on Sequential Circuits Multitrak

“Item is a used, good condition synth. Hasn’t been played in years, so will need new battery. Power supply is missing, but a replacement can be purchased at the manufacturer’s site.” Link

Prophet 600, Sequential Circuits @ 17 August 2017, Comments Off on Sequential Circuits Prophet 600

“Local pickup only. Willing to travel to surrounding Seattle area to meet after purchase. Synth is in good condition and sounds amazing. Has the Gligli Teensy mod install which upgrades the CPU, makes envelopes snappier, and more great features. 6 voice VCO analog beast. ” Link

Pro One, Sequential Circuits @ 17 August 2017, Comments Off on Sequential Circuits Pro One

“I highly doubt anyone looking at this ad does not know the ins & outs of the legendary pro one.

Arguably the standout synth for bass, leads and pads ever. This machine is a monster!

Mine has been upgraded with the Turbo CPU Midi and is in immaculate condition with zero faults.” Link

Sequential Circuits, Six-Trak @ 10 August 2017, Comments Off on Sequential Circuits Six-Trak

“Excellent condition for a 30+ year old synth. I am the second owner (bought in 1990) and have kept this early production model in my smoke free studio ever since. Never gigged or toured. Great sounding unit with no issues. You can find the manual online which I highly recommend. This thing is surprisingly deep in its layering abilities. Sorry, no international bidders please. Good luck bidding!” Link

MultiTrak, Sequential Circuits @ 10 August 2017, Comments Off on Lot of 2 Sequential Circuits MultiTrak Project Machines

“These were purchased as part of a joblot last year, and as there is no power cable they are being sold as is with no returns.

No attempt has been made in my possession to get them looked at and because I am stacked with other synths needing attention with my synth tech, space is a premium therefore these have to go.

As expected some wear and tear but overall in good condition. Please see pictures.”
Link

Pro One, Sequential Circuits @ 10 August 2017, Comments Off on Sequential Circuits Pro One

“I highly doubt anyone looking at this ad does not know the ins & outs of the legendary pro one.

Arguably the standout synth for bass, leads and pads ever. This machine is a monster!

Mine has been upgraded with the Turbo CPU Midi and is in immaculate condition with zero faults.

Selling to fund a house move, music is taking the backseat for while :(”
Link

Sequential Circuits, TOM @ 10 August 2017, Comments Off on Sequential Circuits TOM

“For sale a Sequential Circuits 420 Tom Drum Machine for Spares or repair.

This was purchased as part of a joblot last year, and as there is no power cable its being sold as is with no returns.

No attempt has been made in my possession to get it checked over or looked at and because I am stacked with other synths and drum machines needing attention with my synth tech, space is a premium therefore I’m moving them on…see also the two Multitraks in my other items.” Link

Pro One, Sequential Circuits @ 10 August 2017, Comments Off on Sequential Circuits Pro One

“I’m selling my Sequential Circuits Pro One. It’s in excellent condition and sounds unbelievable. This is the model with the J-Wire keyboard which has recently been serviced and works perfectly. The little rubber cover on the audio output jack popped off and I can’t seem to find it in my studio, this does not affect the audio output at all, it’s purely cosmetic – guaranteed!

All knobs, buttons, wheels, keys, etc… work perfectly. It’s in excellent condition and sounds incredible.

I’m also including my Kenton Pro Solo Mk II MIDI to CV interface which allows you to sequence the Pro One with a DAW.

This synth has been kept in my smoke free home studio, so it will arrive smelling clean.” Link

Model 800, Sequential Circuits @ 10 August 2017, Comments Off on Sequential Circuits Model 800

“Up for your consideration fellow synthesists: The rare vintage Model 800 by Sequential Circuits. I used this with my Arp 2600 for many years. It was a lot of fun, but now it’s time to pass it on to someone else to get creative with! I used it about a year ago and it worked fine. All LED indicators, toggle switches, I/O worked fine. I powered it up today with no problems (see pics), but my system has been dismantled so I can’t verify its current operational state, and therefore I am selling it as-is with no returns.
However, Dave Smith seemingly built these to military spec- they were built rock solid- like they had a Pentagon budget! I bought this one when they first came out (1970’s) so it’s had a stable home environment. These are rare animals especially since it also comes with the original footswitch. I have the original manual somewhere… if I can find it, it’s yours as well (but no guarantees). ” Link

MAX, Sequential Circuits @ 10 August 2017, Comments Off on Sequential Circuits MAX

“SEQUENTIAL CIRCUITS MAX synthesizer, no power supply = UNTESTED, 1 button is missing, LEFT SIDE PANEL is CRACKED – needs to be serviced.” Link