Sequential Circuits Prophet 600 Project Machine

“Selling a vintage Prophet-600 that needs some work. It starts up and plays to some extent but has damage to the membrane keypad (a brand new one is included for you to install) and the LED has the typical dim segment problem. The original side panels (included) were damaged so nice new ones were made. Don’t have the time for this project, but it could be a great finished keyboard with some work.

The red button was added by a previous owner to fix a problem with a broken button on the membrane keypad. Once the keypad is replaced, you could remove or disconnect it.

The synth is otherwise stock and does not have the gligli or any other mods.” Click here to visit listing on eBay

Sequential Circuits Prophet 600

“SCi Prophet-600 programmable polyphonic synthesizer

Looks 9.5 of 10
In very clean condition. Please see pictures carefully.

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

Work list (Excerpt) :

Change all elec. caps with new ones.
Change all power regulator with new ones.
Change all opamps and MUX ICs next to DAC with new ones.” Click here to visit listing on eBay

Sequential Circuits Prophet 600

“I am selling my beloved and well regarded Sequential Circuits Prophet 600 with GliGli upgrade.

The Prophet 600 is a wonderful and rich sounding 2 vco vintage polyphonic synthesizer packed full of features and tricks.

This particular unit is in fantastic condition and features a full set of P5 knob caps. The synth is in great service and works exactly as it should, it is a joy to play. The original CPU will be included in the sale should you wish to swap out the GliGli.

The only minor thing worth mentioning about this unit is that some of the silkscreening around the filter has rubbed away over the years, please see photos for more detail, other than that, the synth is in near mint condition.

I am only selling to upgrade to a modern rev4 prophet 5 as I could use the split keyboard for live shows to greater affect than the 600. ” Click here to visit listing on eBay

Sequential Circuits Prophet 600

“SCi Prophet-600 programmable polyphonic synthesizer

Looks 9.5 of 10
In very clean condition. Please see pictures carefully.

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

Work list (Excerpt) :

Change all elec. caps with new ones.
Change all power regulator with new ones.
Change all opamps and MUX ICs next to DAC with new ones.” Click here to visit listing on eBay

Sequential Circuits Prophet 600

“SEQUENTIAL CIRCUITS PROPHET-600 Synthesizer. Analog. AS-IS.

Selling a vintage Prophet-600 that needs some work. It starts up and plays to some extent but has damage to the membrane keypad (a brand new one is included for you to install) and the LED has the typical dim segment problem. The original side panels (included) were damaged so nice new ones were made. Don’t have the time for this project, but it could be a great finished keyboard with some work.

Included:
Keyboard
New membrane keypad
Original wood side panels
Power cord

Local pickup (Seattle area) available. I will refund any overcharge from the shipping estimate. Thanks for bidding!” Click here to visit listing on eBay

Sequential Circuits Prophet 600

“I am the original owner. Bought it in 1985. Last year did a full service including new keyboard contacts, full cleaning, new membrane, gigli install. Performs “as new” with zero noise from any knob. Overall very good condition with only minor scratches on side wood panels (see pics). Synth is located in Seattle and Will ship double boxed. Unique chance to get a true analog gem.” Click here to visit listing on eBay

Sequential Circuits Prophet 600 Project Machine

“Selling a vintage 1980’s sequential circuits prophet 600 synth. This synthesizer is in great cosmetic condition and functions well but does have a few issues and will be sold as is for parts or repair. One of the voice chips seems to be dead and the lcd screen has about half the pixels out. Easy repairs for the right person. Includes the original power cord, and a gig bag/carry bag for it. “ Click here to visit listing on eBay

Sequential Circuits Prophet 600 Project Machine

“Sequential Circuits Profit 600 Synth Synthesizer Keyboard Super Clean For Fix, this is a one owner purchased directly from their estate sale they hadn’t plugged it in in over 30 years or more and rarely used it to begin with ,it’s definitely near mint with one tiny nick on the end wood cap Upon powering up the unit goest into tune and then program lights just as it should . I was unable to get any sound after about 5 minutes of troubleshooting so I’m selling for fix . I know people like to get the mods on these so I figure I would just let the new owner get it going , don’t miss this super clean unit, sold as is for repair only , no returns!” Click here to visit listing on eBay

Sequential Circuits Prophet 600 Project Machine

“Sequential Circuits Prophet 600 For Parts or Repair Rare Japanese Memory Mod.

Includes synthesizer, hard case with aluminum trim, original Japanese documentation on modification.

This came from japan, not sure what work this needs, if any. Untested. It has been modified with some custom Japanese circuit dated 1987. I think the circuit added a hundred or 2 memory slots for voice recall during live performance. (Like ymo) That’s all I can really say.

I think this is the mod

“Ver.6E3.1にアップグレードすることで、プリセット・メモリーが2倍になりMIDIチャンネルの指定ができるようになります。

また、音源にノイズが追加されます。

費用は26,250円です。ご購入と同時なら改造費は10%OFFです。

or

pre-set it by upgrading it with Ver.6E3.1, and memory doubles and comes to be able to appoint the MIDI channel.

In addition, a noise is added to a sound source.

The expense is 26,250 yen. The remodeling costs are 10%OFF if simultaneous with the purchase.”

So the mod cost 26k yen at some time it seems.

It is in beautiful condition cosmetically.” Click here to visit listing on eBay

Sequential Circuits Prophet 600

“The synth has recently serviced with new battery, numeric membrane panel, and recapped power supply and voice card. Excellent working condition and only a few marks as shown. It has the GliGli upgrade and also have kept the original chip just in case you want to swap it back. The synth has been factory reset with the original patches loaded.

I did have a Prophet 5 before this and can’t really tell the difference to be frank. As some of you may already know the P 600 was the first synth to have Midi installed. Hats off Dave Smith. This is one of the most underrated synths ever! Maybe done purposely?! ” Click here to visit listing on eBay

Sequential Circuits Prophet 600

” Sequential Circuits – Prophet 600 synthesiser with brand new Gligli Update.

The Prophet has just had a service and MOT from Andy at Synthprof (I shall include the receipt £360 in the sale) and is future-proofed for your peace of mind.

Comes in new custom hardcase. Synth is fully working and is in unbelievable condition with only tiny blemishes, to be honest it looks like it just left the factory.

The pictures should say it all…What a thing to find one in this condition, Gligli firmware updated, serviced and future-proofed by Synthprof.” Click here to visit listing on eBay

Sequential Circuits Prophet 600

“This is the mac-daddy of Prophet 600s. This 1982 beast not only has the GliGli CPU upgrade, it has the coveted voice panning, stereo mod (which allows you to pan the 6 voices along the stereo field, like an Oberheim OB-8) and the instrument now has stereo outs in addition to the original mono output….in addition, this prophet 600 has a new fatar keybed installed (the same keybed that is in the high end Dave Smith and Moog Boards). Simply the best Prophet 600 you will ever see for sale. includes original Prophet 600 manual.” Click here to visit listing on eBay

Sequential Circuits Prophet 600

“This is the mac-daddy of Prophet 600s. This 1982 beast not only has the GliGli CPU upgrade, it has the coveted voice panning, stereo mod (which allows you to pan the 6 voices along the stereo field, like an Oberheim OB-8) and the instrument now has stereo outs in addition to the original mono output….in addition, this prophet 600 has a new fatar keybed installed (the same keybed that is in the high end Dave Smith and Moog Boards). Simply the best Prophet 600 you will ever see for sale. includes original Prophet 600 manual.” Click here to visit listing on eBay

Sequential Circuits Prophet 600

“Sequential Prophet-600 Analog Polyphonic Synthesizer.

Condition is “Used”.

Working Sequential Circuits Prophet-600 analog polyphonic synthesizer.
-Cosmetics pretty good for a nearly-40 year-old keyboard (see the pics).
-Control membrane switch panel fully working
-all pots & switches working appropriately
-recent battery change
-power supply electrolytic capacitors replaced in last 5 years
-all tantalum capacitors replaced with electrolytic capacitors
-new electrolytic capacitors in VCF circuits
-basic midi in & out functionality verified
-control foot switch verified

I played it, going through the patches and all sounds appropriate. All the keys trigger fine for my playing but there were a few that slightly double-triggered (very infrequent on most keys with most patches).” Click here to visit listing on eBay

Sequential Circuits Prophet 600

“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.
I have never had any issues but due to age and being modded it is sold as is. All sales are final.”
Click here to visit listing on eBay

Sequential Circuits Prophet 600

“Sequential Circuits Prophet 600 – with Gligli Mod, and original CPU. Condition is “Used”. Shipped with UPS Ground.
This synth sounds great, exactly like the 80s!
There is some wear on the keyboard, to be expected from an instrument from 1982, but ive had no issues with its reliability.
I had this keyboard serviced in late 2018, and recently had the keybed re-painted with magnetic contact paint, making sure that all keys consistently fire, making this guy a fantastic performer!” Click here to visit listing on eBay

Sequential Circuits Prophet 600

” Sequential Circuits Prophet 600 – with Gligli Mod, and original CPU. Condition is “Used”. Shipped with UPS Ground.
This synth sounds great, exactly like the 80s!
There is some wear on the keyboard, to be expected from an instrument from 1982, but ive had no issues with its reliability.
I had this keyboard serviced in late 2018, and recently had the keybed re-painted with magnetic contact paint, making sure that all keys consistently fire, making this guy a fantastic performer!” Click here to search for synths on eBay

Sequential Circuits Prophet 600

“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

“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

Sequential Circuits Prophet 600

“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

Sequential Circuits Prophet 600

” 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