“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

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

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

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

Prophet 600, Sequential Circuits @ 03 August 2017, Comments Off on Sequential Circuits Prophet 600

“The keyboard is in average condition for its age.

Some blemishes in the wood.

12 of the keys need the contacts cleaned.

It is missing the speed knob.

The only testing I have done on the unit was powering it up, hooking up some headphones, and listening to the presets.

I’m guessing it could use a thorough cleaning. ” Link

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

“This Sequential Circuits Prophet 600 Gligli Mod Analog Synthesizer Keyboard – Used is a used item that our in-house techs have fully tested. Unless otherwise noted in the auction, we have verified it to be in good working condition.” Link

Prophet 600, Sequential Circuits @ 29 June 2017, Comments Off on Sequential Circuits Prophet 600

sciprophet600 “A stunning relic, vintage analog synth Prophet 600—the first commerically available MIDI synth, currently used by James Holden. Includes a fantastic hard case and is in excellent cosmetic condition. Please see photos for further detail!” Link

Prophet 600, Sequential Circuits @ 15 June 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.” Link

Prophet 600, Sequential Circuits @ 15 June 2017, Comments Off on Sequential Circuits Prophet 600

“Keypad is functional, but is slightly raised and damaged. Has some cosmetic scuffs and scratches. Sold as-is, as pictured. Includes no additional accessories beyond what is pictured.” Link

Prophet 600, Sequential Circuits @ 15 June 2017, Comments Off on Sequential Circuits Prophet 600

“This is a Ultra Rare Sequential Circuits Prophet 600 unit that was serviced and purchased in Japan. It has been factory fitted for use in Japan for a 100Vac 50Hz power requirement. It come with a Brand New 115-120Vac converter to 100Vac to use this synthesizer properly. Though some may argue it will work fine plugged into a 115-120Vac outlet, I would have to disagree. The proper voltage should be used on this unit to prevent a higher voltage on the devices due to a higher step-down voltage if used with a USA outlet. This unit is in fantastic shape and was well maintained. It also comes with its own gig bag.
All keys, switches, wheels and knobs all function but some are slightly scratchy because the unit sat idle for a few months. Testing it and using it that seems to be going away. Cosmetically it is fantastic shape and you can certainly judge by the multiple pictures. It will be packed very securely as you can see by my 100% feedback score, I take care of all my buyers.” Link

Prophet 600, Sequential Circuits @ 08 June 2017, Comments Off on Sequential Circuits Prophet 600

“Keypad is functional, but is slightly raised and damaged. Has some cosmetic scuffs and scratches. Sold as-is, as pictured.” Link

Prophet 600, Sequential Circuits @ 01 June 2017, Comments Off on Sequential Circuits Prophet 600

“Keypad is functional, but is slightly raised and damaged. Has some cosmetic scuffs and scratches. Sold as-is, as pictured. Includes no additional accessories beyond what is pictured. ” Link

Prophet 600, Sequential Circuits @ 18 May 2017, Comments Off on Sequential Circuits Prophet 600

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

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 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

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

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

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

p600 “SCI Sequential Circuits Prophet 600 6 Voice Analog 61 Key Synthesizer (1983)
Clean, Guaranteed Fully Functional.

Auction includes everything in photos:

SCI Sequential Circuits Prophet 600 6 Voice Analog 61 Key Synthesizer
Clean Road Runner 61 key soft, black felt lined keyboard bag
Standard 6ft 3 prong power cable

Second owner, gently used, home studio use only. Contact board professionally cleaned, new battery, all internal boards nice and clean. Cosmetically, some wear on the top edge, right wood cheek like broken in jeans, some light scratches on rear. Warm, every key fires cleanly. Sounds EXCELLENT! Synth will be shipped & packed respectfully.” Link

Prophet 600, Sequential Circuits @ 30 March 2017, Comments Off on Sequential Circuts Prophet 600

p660 “Unit powers on but requires a new keypad control panel membrane as well as new keys/contacts. Some keys do not trigger/ do not immediately trigger but some work. Knobs and switches appear to be functional. Includes power supply + original manual. Sold as is/no returns.” Link

Prophet 600, Sequential Circuits @ 23 March 2017, Comments Off on Sequential Circuits Prophet 600

prophet600 “Awesome Prophet 600 Analog Synth in great condition. The wooden end panels are banged up but super easy to make or buy on ebay. The front panel looks near perfect. no scratches in the graphics at all. Its been tested fully functional as far as I can tell.All knobs and switches work great. the pitch wheel doesn’t return to zero I’m assuming it’s supposed to.but does not affect it’s function. comes with power cord and nothing else. This thing sounds incredible. the bottom on it is killer. it screams pure and simple.” Link

Prophet 600, Sequential Circuits @ 16 March 2017, Comments Off on Sequential Circuits Prophet 600

p600 “Item: SEQUENTIAL Prophet-600 Ver .SIX E3.1 synth keyboard instrument .The first commercially available synth to implement MIDI!! It’s a fun synth. Polyphonic MIDI implementation and up to 100 memory patches. The P600 has two oscillators per voice with saw tooth, triangle and variable pulse waveforms. The oscillators can be individually tuned or synced together. Tested and working condition.
Condition: This is used and has some minor flaws/scratches/scuffs/chips. The right fork (a/b) spring came loose and needs to be reattached, missing tuner knob, and the middle white key has an underside chip. The right side wood panel has a small chip, which does not comprise the integrity of the system. It comes with the power cord.” Link

Prophet 600, Sequential Circuits @ 16 February 2017, Comments Off on Sequential Circuits Prophet 600

p6000 “Sequential Circuits Prophet 600 out of a smoke-free studio. Just came back from the shop and it’s in fantastic cosmetic and working condition! Everything works great. Only noticeable issue is the numeric keypad makes a sticking sounds when you press the buttons, but they function fine. Battery was just replaced. Original owner, never toured. Probably about as close to new as you can get. Includes power cable and original box.” Link

Prophet 600, Sequential Circuits @ 09 February 2017, Comments Off on Sequential Circuits Prophet 600

p-600 “This synthesizer is in good used condition, with some scuffs and scratches from previous use. This unit was tested and seems to be working well, but not every single function was tested. The power cable is included. There is some chipping to the wooden body (see detailed photos).” Link

Prophet 600, Sequential Circuits @ 02 February 2017, Comments Off on Sequential Circuits Prophet 600

6 “Prophet 600 analog synthesiser just serviced and in perfect working condition. Only sign of wear on the top corner of the left wood side panel (see picture 6). Comes with switch pedal.

The P600 has two oscillators per voice with sawtooth, triangle and variable pulse waveforms. The oscillators can be individually tuned or synced together. Similar quality VCF and VCA sections from the Prophet 5 can be found here too! The P5’s Poly-Mod section has also been passed onto the P600.

The P600 is extremely versatile and easy to use! Its best functions include the onboard arpeggiator, 2-track sequencer and poly-modulation. The P600 is great for creating analog effects, swells and drones. It has a cool glide effect and has very flexible modulation possibilities.” Link

Prophet 600, Sequential Circuits @ 02 February 2017, Comments Off on Sequential Circuits Prophet 600

p6000 ” This Prophet 600 is in super condition and has recently had a $600 full service performed by the excellent technicians at Switched On, Austin TX. Sounds amazing, plus it has the TEENSY Modification done.

You wont find a better example of this synth anywhere, for its age it is sublime.

Also comes with a professional Clydesdale shipping case.” Link

Prophet 600, Sequential Circuits @ 26 January 2017, Comments Off on Sequential Circuits Prophet 600

600 “I’m selling my beautiful Prophet 600 with the latest firmware update from Gligli and a fresh membrane panel from LA Synth Co (installed 3 months ago).

– Original wood ends have been lightly sanded and finished.
– I will include the original IC with the factory firmware
– Keybed is in pretty good shape, the keyboard bushings were replaced a year ago.” Link

Prophet 600, Sequential Circuits @ 19 January 2017, Comments Off on Sequential Circuits Prophet 600

p600 “Amazing Deal!!!!
PROPHET 600 by Sequential Circuits
Original MIDI synthesizer.
Very special synth….
All the keys work. All the oscillators, switches and pots are functional and original. Display functions, front panel button overlay super clean. There is minor damage to one wooden side and one key (middle G) has a small chip missing from the underside (see in picture). Has never been in a smoking studio.” Link

Prophet 600, Sequential Circuits @ 19 January 2017, Comments Off on Sequential Circuits Prophet 600

600 “This Prophet 600 is in super condition and has recently had a $600 full service performed by the excellent technicians at Switched On, Austin TX. Sounds amazing, plus it has the TEENSY Modification done.

You wont find a better example of this synth anywhere, for its age it is sublime.

Also comes with a professional Clydesdale shipping case.

Will ship immediately upon receiving payment.” Link

Prophet 600, Sequential Circuits @ 19 January 2017, Comments Off on Sequential Circuits Prophet 600

p600 “Keypad is functional, but is slightly raised and damaged. Has some cosmetic scuffs and scratches. Sold as-is, as pictured. Includes no additional accessories beyond what is pictured.”
Link

Prophet 600, Sequential Circuits @ 12 January 2017, Comments Off on Sequential Circuits Prophet 600

prophet 6500 “Here is a beautiful and fully operational example of a Sequential Circuits Prophet 600.
This unit has been meticulously serviced and upgraded to bring it to it’s absolute fullest potential.
All of the insides have been perfectly calibrated and tuned. All tantalum capacitors have been changed with high quality electrolytic, a common flaw in all sequential gear. All controls have been cleaned and the membrane pad works perfectly. The keybed, another common ailment of prophet 600’s, has been serviced to ensure it will not loose notes.

The unit features 2 upgrades:
Brand new custom made wood sides
GliGLi CPU modification, which is the mod that makes these prophets scream as loud as it’s older the brother, the prophet 5.” Link

Prophet 600, Sequential Circuits @ 08 December 2016, Comments Off on Sequential Circuits Prophet 600

pro6 “Sequential Prophet 600 with gligli near mint. Here I’m selling a very good cosmetic condition Prophet 600 including the gligli upgrade. It’s fully working with no issues and looks nearly mint. Sounds amazing. box is already sold so only synth now
its the us verions so comes with small converter” Link

Prophet 600, Sequential Circuits @ 13 October 2016, Comments Off on Sequential Circuits Prophet 600

p600 “SEQUENTIAL CIRCUITS PROPHET 600

Fantastic synthesizer which I have owned, used and loved for 5 years. Was recently serviced by an internationally respected synth repairman with a new membrane, repaired ‘B’ oscillator, new knobs for a couple that were missing, new wood plates, etc. My favorite of the synths I’ve owned, but it’s time for me to pass it on to new hands.

Comes with a flight case. $200 already taken care of, so it’ll stay in your wallet!

Buy with confidence! Item sold AS IS!” Link

Prophet 600, Sequential Circuits @ 29 September 2016, Comments Off on Sequential Circuits Prophet 600

used-prophet-600 “Great condition, all ports working, and was recently cleaned and factory patches were restored.” Link

Prophet 600, Sequential Circuits @ 15 September 2016, Comments Off on Sequential Circuits Prophet 600

prophet_600 “An excellent condition, fully functional, all original, Prophet 600.
Plus a rock solid hard case. (Essential if you are taking it out of your studio or for safe shipping!)

I have loved using this synth over the years. Just finished a score with this Prophet all over it. Always inspiring. I hate to let it go but you will love it.

If you are like me you’ll dive into this deep synth and not come up for air for awhile.” Link

Prophet 600, Sequential Circuits @ 08 September 2016, Comments Off on Sequential Circuits Prophet 600

600 “Excellent condition Prophet 600! Recently serviced and fully functional. Sounds amazing! Includes gligli upgrade, and original manual. Will also include original OS chip, in case you want to revert to stock OS. ” Link