“This keyboard works almost like new! I discovered two keys that don’t work unless you press on them pretty hard. I suspect they need to be cleaned underneath. Some of the wood has also been damaged – otherwise, it is in great condition! ” Click here to visit listing on eBay

“This keyboard works like new! Some of the wood has been damaged – otherwise, it is in great condition!” Click here to visit listing on eBay

Prophet 600, Sequential Circuits @ 19 July 2018, Comments Off on Sequential Circuits Prophet 600

“SPECIFICS
*This synth is 100% Functional. (Everything works as if it was brand new including all controls, pots, switches, LEDs, & input/output jacks.).
*The electronics is 100% Functional. All VCO’s, VCFs, ADSR’s, VCA’s, LFO’s, etc work as they should.
*The touch pad (membrane switches) works like new.
*The keyboard action is like new and all keys are in alignment. All 61 keys are functional and none of them stick.
*This synth is in immaculate cosmetic condition with no noticeable dings, scratches, or blemishes. ” Click here to visit listing on eBay

Prophet 600, Sequential Circuits @ 05 July 2018, Comments Off on Sequential Circuits Prophet 600

” Prophet 600. In great condition everything works. Had it serviced 1 year ago. Doesn’t get played enough.
I’ve owned for almost 30 years. Purchased in August of 1988.” Click here to visit listing on eBay

Prophet 600, Sequential Circuits @ 21 June 2018, Comments Off on Sequential Circuits Prophet 600

“Sequential Circuits Prophet 600.

One owner purchased in 1982.

Has original box it shipped and stored in.

Original instructions, foot pedal, and factory programs cassette tape included. ” Click here to visit listing on eBay

Prophet 600, Sequential Circuits @ 21 June 2018, Comments Off on Sequential Circuits Prophet 600

“This one is in really nice shape and is in great working condition. As you can see in the photos, this Vintage analog synth has been well looked after and has the regular wear and tear for a vintage synth of this age and pedigree.The unit has been fully tested, cleaned regularly and maintained well.All the keys, sliders, knobs, and switches are original and working as they should be.The front panel is clean with the usual marks & blemishes for a vintage synth of this age. Front panal has a very unnoticeable scratch (shown in photo)Back of unit has usual tour wear and tear as expected.The synth has been kept and stored in a climate controlled recording studio.Both beautiful side panels are brand new and without a blemish. (the originals are also included)This Prophet 600 is good looking and solid” Click here to visit listing on eBay

Prophet 600, Sequential Circuits @ 14 June 2018, Comments Off on Sequential Circuits Prophet 600

“Condition: B +: no problems in applications that normally use
Year of Manufacture: Unknown” Click here to visit listing on eBay

Prophet 600, Sequential Circuits @ 07 June 2018, Comments Off on Sequential Circuits Prophet 600

“This synth uses the same CEM 3340 VCOs you’ll find in the Prophet 5 Rev 3 and OBerheim OBXA/OB8.

First commercial synth with MIDI

Pro Serviced (May 2018) with fulll calibration, GliGli installation, and keybed service. Gligli brings it up to specs with most modern synths regarding midi clock/sysex support/overhauled lfo and envelope sections/fm capabilities, filter drive and way more. This is basically as close as you’ll get to a prophet 5 without spending 5-6 grand. It’s a nasty nasty sounding synth especially for the money. Everything works, but you might want to clean the keybeds a touch.

Pro serviced by Analog Synth Service May 2018.
Sequential Circuits Prophet 600 with Teensy/GliGli Update installed.
New membrane panel also recently installed.
This synth is in excellent working condition with all keys, buttons, switches and knobs working perfectly.
Cosmetically it has some wear on the wooden sides and also some minor scratches and tape residue. See pics for more details. ” Click here to visit listing on eBay

Prophet 600, Sequential Circuits @ 31 May 2018, Comments Off on Sequential Circuits Prophet 600

“Sequential Circuits Prophet 600 analog synthesizer.
All keys work.
New on-board battery” Click here to visit listing on eBay

Prophet 600, Sequential Circuits @ 24 May 2018, Comments Off on Sequential Circuits Prophet 600

“Sequential Circuits Prophet 600 with GliGli Chip Update installed.

The GliGli update basically it adds many new functionalities, such as making the envelopes punchier and adding more arpeggio settings, Google it!

This synth is in excellent working condition with all keys, buttons, switches and knobs working perfectly.

Cosmetically it has some wear on the wooden sides and also some minor scratches and tape residue. See pics for more details.” Click here to visit listing on eBay

Prophet 600, Sequential Circuits @ 26 April 2018, Comments Off on Sequential Circuits Prophet 600

“Good condition . Everything works as should . Great sounding synth. Original factory presets in the keyboard .” Click here to visit listing on eBay

Prophet 600, Sequential Circuits @ 26 April 2018, Comments Off on Sequential Circuits Prophet 600

“Great sounding piece I’ve rarely used over the years. Needs a new home. I got it in the mid 90’s exactly as is shown. Signed. Keyboard works fine bit has a cig burn and cracked key. The entire replacement of the keyboard is about 100$ but I never had a problem with it, I’m more concerned with how it sounds (awesome) then the cosmetic issues. ”
Click here to visit listing on eBay

Prophet 600, Sequential Circuits @ 19 April 2018, Comments Off on Sequential Circuits Prophet 600

“This Prophet 600 looks amazing for its age. All the knobs function and all LEDs light up in response to the touch pads. I re-loaded the 100 factory preset programs back into it to give it a fresh start and they play,sound and match their descriptions OK. I’ve never had this keyboard worked on and after ten years of home studio use followed by 23 years of storage in my closet here’s what went wrong:

1.) On a few programs, some keys are dead or weak, while in the rest of the programs all the keys sound out as they should. It exhibits this behavior since I pulled it out of storage. I probably should replace the battery but I don’t want to put any work/money into it unless I could verify it would fix the problems.

2.) Tunes itself OK but, it seems like an oscillator gets a little wavy at times. (De-tuning noticed during chords). The oscillators have never been tuned, gets a little better as it warms up

3.) That being said overall this synthesizer sounds great and I believe a little technical service will revive this rare and (truly vintage classic) analog synthesizer. NOTE: While taking photos I noticed it appears to have been factory signed. Pretty faded though” Click here to visit listing on eBay

Prophet 600, Sequential Circuits @ 12 April 2018, Comments Off on Sequential Circuits Prophet 600 Project Machine

“THIS SALE IS FOR Vintage Sequential Circuits Prophet 600 Synthesizer PROJECT

INCLUDE: NO POWER CORD. UNTESTED

HISTORY: ITEM CAME FROM STATE SURPLUS AND IT IS “AS IS” NO RETURN ”
Click here to visit listing on eBay

Prophet 600, Sequential Circuits @ 12 April 2018, Comments Off on Sequential Circuits Prophet 600

“Great sounding piece I’ve rarely used over the years. Needs a new home. I got it in the mid 90’s exactly as is shown. Signed.

Keyboard works fine bit has a cig burn and cracked key. The entire replacement of the keyboard is about 100$ but I never had a problem with it, I’m more concerned with how it sounds (awesome) then the cosmetic issues.” Click here to visit listing on eBay

Prophet 600, Sequential Circuits @ 22 March 2018, Comments Off on Sequential Circuits Prophet 600

“Great working condition”
Click here to visit listing on eBay

Prophet 600, Sequential Circuits @ 25 January 2018, Comments Off on Sequential Circuits Prophet 600

“Classic analog synth with amazing fat leads, lush brass, atmospheric pads and filter sweeps from early-mid 1980s, with MIDI, comes with hard case.

The high A key was repaired professionally and is fully functional, just shows some slight discoloration. See pics for wear/scratches on wood and rest of body.

Membrane keypad and LED display are new (exact replacement part), and were professionally installed.

I played this keyboard for years in a gigging/recording band and loved the amazing analog sounds you could coax out of this thing. It has a unique and undeniable character. Has real heart as an instrument and I hate to see it go.

Hard Case is made of thick plywood covered in felt with metal corners and hardware. Inside is foam. Very heavy-duty build and is valued at ~$125 on its own–included with your purchase at no extra charge.”
Click here to visit listing on eBay

Prophet 600, Sequential Circuits @ 04 January 2018, Comments Off on Sequential Circuits Prophet 600 Project Machine

“NOT WORKING! Will not turn on. I have owned this synth since it was new for my home studio. See pics for superb cosmetic condition. Never gigged, never left it’s climate-controlled, smoke free environment. I do not know what the issue is, but before it went into storage I tested it and found several keys did not play. This was always played thru MIDI from my DX7, so I didn’t notice this before that. Hopefully someone familiar with these can bring it back to life-these instruments have a wonderfully rich sound and deserve to be played.

It will ship with the original Owner’s Manual and a HYBRID flight case that I had made for it when new.

The Prophet-600 is a 6-voice polyphonic analog synthesizer with a 5-octave, 61-note (C-C) keyboard. Each voice consists of two VCOs, two VCFs, and two VCAs. Each of these components has its own independent ADSR envelope. Each Prophet-600 voice uses 2 sets of Curtis Chips for its architecture.”
Click here to visit listing on eBay

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

” Selling ]1982 Sequential Circuits Prophet 600 ]e. Everything works perfectly excep program cover is loose it has been taped does not effect plays great please see photos ” Click here to visit listing on eBay

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

“Selling my 1982 Sequential Circuits Prophet 600 along with the case. Everything works perfectly as the person who owned before me was a sound engineer. Great value for a vintage analog synth! Does not have Gligli update.” Click here to visit listing on eBay

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

” For sale is my Sequential Circuits Prophet 600 synth. It’s fully functional and in nice shape. It does have some wear so be sure to check out the pictures to make sure you like it. Classic vintage analog SCI synth, don’t miss out. ” Click here to visit listing on eBay

Prophet 600, Sequential Circuits @ 14 September 2017, Comments Off on Sequential Circuits Prophet 600 Project Machine

“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” Click here to visit listing on eBay

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.” Click here to visit listing on eBay

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.” Click here to visit listing on eBay

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. ” Click here to visit listing on eBay

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. ” Click here to visit listing on eBay

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.” Click here to visit listing on eBay

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!” Click here to visit listing on eBay

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.” Click here to visit listing on eBay

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.” Click here to visit listing on eBay

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.” Click here to visit listing on eBay

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.” Click here to visit listing on eBay

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. ” Click here to visit listing on eBay

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″ Click here to visit listing on eBay

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.”” Click here to visit listing on eBay