Prophet 600

“Great shape, completely re-capped and new internal battery in 2019, Forge (by Anvil) hard case with perfect fit and good foam, original manual (worn, see pics), gligli modded and will also include the original Z80 chip.

Sounds amazing, everything works. A special synth.” Click here to search for synths on eBay

“Sequential Circuits Prophet-600 polyphonic synthesizer

Looks 8.75 of 10
Some scratches discovered but in clean condition. please see pictures.

Works 10 of 10
Everything works as specified, overhauled before shipping to have long life and to keep original sounds.

Work list:
Change all elec. caps, tant caps and poly caps with new ones.
Change all power regulators and rectifier diodes with new ones
DAC adjustment
Change all buffer Opamps and multiplexors with new ones
Keys, knobs, switches and jacks cleaning.

gligli firmware 2.00 installed
factory 100 sound data installed

Voltage changed to 120 or 220-240V for free on buyer’s request.” Click here to search for synths on eBay

“Sequential Circuits Prophet 600 GliGli modded Keyboard Synthesizer. Condition is Used.
Includes power cable and original OS chip

professionally gligli modded
All switches, knob, keys work, and were recelty cleaned and properly lubricated and feel great.
Audio out is clean and strong. Has lower noisefloor than a bunch of modern gear.
Small ding in one wooden ear but othwrwise in great cosmetic condition.
All 6 voices work and keep tune. All membrane buttons are responsive. And the LED js bright and clear for its age.
Everything appears to work as it should and patches sound great.
Overall great condition. ” Click here to search for synths on eBay

“10/15/20. My tech just went through and check all functions. Battery is good and shows 3V.

This is a rare Sequential Circuits Prophet 600 OS version 2.9 (uploaded Video showing power up can be seen in my tristarmusicgear Instagram page) in 100% working condition with the must-have GliGli Mod, which truly takes the synth to the next level, putting it alongside the Prophet 5 as one of the greatest analog polysynths ever.

The previous owner painted the wood side panels black, which in my opinion gives it a sleeker and more refined look. See for yourself in the photos. If you prefer brown wood, there are a few people selling Prophet 600 wood side panels online. Few dents on the membrane panel.

The synth was fully cleaned and serviced by a synth professional when acquired from previous owner. There are a few small scratches and dings as you can see in the photos, and a few knobs have fading paint, as you might expect from a synth that is almost 40 years old. All buttons, knobs, and switches work as expected (make sure to read the GliGli manual at https://gligli.github.io/p600fw/), and the sound is unbelievable.” Click here to search for synths on eBay

“Fully working and with the desirable Gligli mod installed. This was fully overhauled when we bought it to ensure longevity and had new wooden end cheeks installed to finish it all off. It was purchased for use on a project” Click here to search for synths on eBay

“Sequential Prophet-600 for sale. This one has been modified with the GliGli firmware upgrade. I will include the original z80 microprocessor should you want to restore the Prophet to its original state, as well as a printed copy of the GliGli manual.” Click here to search for synths on eBay

” Sequential Circuits Prophet 600 Analog Keyboard Synthesizer, manufactured in the early 1980s. Condition is used. Shipped with UPS Ground in included Road Ready flight case (slight crack in case – purely cosmetic! – see attached photos).

This keyboard is in excellent condition! Plays beautifully, extremely fun to program. Historic, early MIDI compatible synth. No real cosmetic damage; all original knobs, wheels and sliders.

This analog gem has been in my studio since 2008 – I am a retired studio engineer and theatrical sound designer. Has been used for a great deal of studio production as well as live shows over the years. I am only selling because I am no longer working in sound; it’s been a much-loved piece of gear and I hope to pass it on to someone who appreciates it as much as I have!” Click here to search for synths on eBay

“Vintage legend from Sequential in very good condition.

All keys knobs and modules works great.” Click here to search for synths on eBay

“Studio use only. Beautiful Cherry wood sides. GliGli mod. All works as it should.
No scratches, with photocopied manuals, power cord and original OS chip.” Click here to search for synths on eBay

“Sequential Circuits Prophet 600 synthesizer.
I have listed this item for parts not working but the synthesizer does work but is in rough / medium cosmetic condition. Electrically it seems to work fine but I cant say for sure all the functions work as it has never been serviced by a tech in the brief time Ive owned it.
here is what I do know.
all keys work and produce sound. synth tunes up and after warm up stays in tune.
touch pad looks rough but all buttons work. there are about 10 presets stored that play.
you can make your own presets and they will store in memory for recall.
that is about the extent I have worked with it. I am a novice player and do not know all the synths functions or capabilities. hence why its being sold as is for parts not working.” Click here to search for synths on eBay

“Sequential Circuits Prophet 600 (with GLIGLI) Vintage Synthesiser in superb condition + flightcase. Only selling due to need to downsize.

Fully working, some marks here and there but globally in an excellent and beautiful condition” Click here to search for synths on eBay

“The synth has been freshly serviced and thoroughly tested, and all functions and features work as intended. There’s only very light wear on the solid wood ends framing the synth, and only a bit of additional light edge wear on the enclosure. All of the original knobs are intact too.” Click here to search for synths on eBay

“SCi Prophet-600 programmable polyphonic synthesizer

Looks 9.5 of 10

In very clean condition,. Please see pictures.

Works 10 of 10
Everything works as specified, overhauled before shipping to have long life and to keep original sounds.
Change all electrolytic capacitors and some short life transistors, opamps and logis ICs with new ones,
and keys knobs, sliders, switches and jacks cleaning before shipping.” Click here to search for synths on eBay

“Used But In Good Working Condition. Used in Studio Only. stand is not included.” Click here to search for synths on eBay

” original prophet 600. fantastic condition, a few small cosmetic scratches” Click here to search for synths on eBay

“SCi Prophet-600 programmable polyphonic synthesizer

Looks 9.25 of 10

Some minor scratches discovered but looke younger than its age. Please see pictures.

Works 10 of 10
Everything works as specified, overhauled before shipping to have long life and to keep original sounds.
Change all electrolytic capacitors and some short life transistors, opamps and logis ICs with new ones,
and keys knobs, sliders, switches and jacks cleaning before shipping.” Click here to search for synths on eBay

” Sequential Circuits Prophet 600 GliGli plus SCI hard case. Immaculate. Tip top condition throughout. A pleasure to play.

Includes original SCI Prophet 600 hard case.” Click here to search for synths on eBay

“The compact PROPHET series released in 1982.
The tone is a bright sound peculiar to SEQUENTIAL, and since it is equipped with MIDI, it can be immediately introduced to the home recording environment.
Serial number: 930
Accessories: None” Click here to search for synths on eBay

“Sequential Circuits Prophet 600 Keyboard Synthesizer. Condition is Used. Square wave on one of the oscillators is a bit finicky. Wiggling the switch for the wave shape usually does the trick, but I suspect pots need to be cleaned. I’ve lowered the price because of this. No other issues with the synthesizer. Comes with power cable, hard case from previous owner, and foot pedal. ” Click here to search for synths on eBay

“* There are scratches and paint peeling on the exterior. Please refer to product photos.” Click here to search for synths on eBay

“Sequential Circuits Prophet 600, in excellent condition.
This synthesizer is in excellent condition, though it does show some tiny signs of age.
It is fully working, have been cleaned and refurbished.
All the knobs have been cleaned and lubricated.
The keyboard has been rebuilt, every keys are working correctly without double triggering.
The unit has been calibrated following the factory specifications.”
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“SEQUENTIAL CIRCUITS PROPHET 600 SYNTHESIZER.

Condition is Used. Works well but…………………SOMETIMES…………

Does have an intermittent fault on some start ups, the Synth goes into edit mode at times, this clears after 5/6 re-starts, maybe in need of a service.

The Synth was gigged regularly throughout the 80’s and early 90’s but has not been gigged since 1993. Only used occasionally at home.

No updates or modifications have been applied.

It was serviced by “Synth Repair Services in Stoke -on -Trent on 26th Nov 2012. (Copy of Invoice in Photos)

All the keys work, as does all the Knobs and Pitch Wheels.

It comes with the operation manual, the condition of this is well used., I do not have the original tape to upload the original patches.

There is a flight case that was made for the synth, which comes with it.

The condition is well used, with cosmetic damage..See photos. ” Click here to search for synths on eBay

“SEQUENTIAL CIRCUITS PROPHET 600 Analog VINTAGE SYNTHESIZER Midi Keyboard for sale.

Has been stored away in case for a long time now so condition is in tact and very good. Comes with original manual as well. This item has been part of my private collection which I am now selling.

I think it has one faulty voice chip or filter. I am not sure. Price has been lowered to make up for this.”
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“SEQUENTIAL CIRCUITS PROPHET 600 SYNTHESIZER.

Condition is Used. Works well but…………………SOMETIMES…………

Does have an intermittent fault on some start ups, the Synth goes into edit mode at times, this clears after 5/6 re-starts, maybe in need of a service.

The Synth was gigged regularly throughout the 80’s and early 90’s but has not been gigged since 1993. Only used occasionally at home.

No updates or modifications have been applied.

It was serviced by “Synth Repair Services in Stoke -on -Trent on 26th Nov 2012. (Copy of Invoice in Photos)

All the keys work, as does all the Knobs and Pitch Wheels.

It comes with the operation manual, the condition of this is well used., I do not have the original tape to upload the original patches.

There is a flight case that was made for the synth, which comes with it.

The condition is well used, with cosmetic damage..See photos.”
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“I’ve had this synth for about 7 years. It sounds fantastic, looks beautiful and clean, and I’m sure I’ll regret selling it. From what I’ve tried, the new DSI synths don’t come close to the raw immediacy of this sound.

This P600 was acting up and had a recent trip to Wine Country Sequential last year to fix some underlying bugginess. In the time I’ve had it it has seen an almost entire replacement of the digital control ICs for the panel controls, as well as the replacement of all the original plastic potentiometers with nice metal, panel mounted, buttery smooth metal pots, and a new production membrane pad. It also has a new battery, brand new EPROM, and all original factory presets loaded in.

While it is completely up and running (and sounding amazing!) one of the filters doesn’t quite track. If interested, I can answer any questions or send sound samples regarding this.”
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“SEQUENTIAL CIRCUITS PROPHET 600 SYNTHESIZER.
Condition is for parts or not working. It switches on but it is faulty.
I have had this for many years, when it stopped working i thought i’d get it refurbished.
That was 5 years ago and i have done nothing with it so here it is for sale. I have the original (tatty) manual.”
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“This Sequential Circuits Prophet 600 is for parts/needs repair. The keyboard is cosmetically clean overall but the left side wood panel was cracked and has been repaired (pictured). Also, the Frequency knob in the LFO-MOD section is missing. The keyboard powers on and all parameters are working but there is a total of 5 keys that do not pass any sound. We are not repairing. Selling this as is as a project synth. The keyboard mostly does work. This is a great project for a tech to get into to restore it to its full glory.”
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“Sequential Circuits Prophet 600 Keyboard Synthesizer with Anvil Case, sustain pedal and original preset cassette. The synth had the battery replaced a few years ago and seems to be fully functioning as it should. There are a few nicks and scrapes on the sides and on the metal, but overall it is in great condition. Synth is sold as is since I’m not an expert, but I can’t find anything of note to mention as far as how it sounds/plays.”
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“SEQUENTIAL CIRCUITS PROPHET 600 SYNTHESIZER.

Condition is Used. Works well but…………………SOMETIMES…………

Does have an intermittent fault on some start ups, the Synth goes into edit mode at times, this clears after 5/6 re-starts, maybe in need of a service.

The Synth was gigged regularly throughout the 80’s and early 90’s but has not been gigged since 1993. Only used occasionally at home.

No updates or modifications have been applied.

It was serviced by “Synth Repair Services in Stoke -on -Trent on 26th Nov 2012. (Copy of Invoice in Photos)

All the keys work, as does all the Knobs and Pitch Wheels.

It comes with the operation manual, the condition of this is well used., I do not have the original tape to upload the original patches.

There is a flight case that was made for the synth, which comes with it.

The condition is well used, with cosmetic damage..See photos. ”
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