Custom 'Black Prophet' Reverse Keys Sequential Circuits Prophet 600 SN 440

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"Prophet 600 customized 'Black Prophet':

- reverse keys

- Prophet 5 metal cap knobs

- now discontinued GliGli upgrade installed

- darker wood cheeks

- brand new original CEM3340 Rev G VCOs"

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Wine Country Sequential Circuits Prophet 600 GliGli SN 2682

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"This is a wine country “perfect prophet” which has been recently serviced having its pots and switches cleaned and lubricated. It has the gligli modification with the Imogen 2022 code. The brief video demonstrates power up, key triggering and sound sounds. Introducing the Sequential Circuits Prophet 600, a classic vintage analog synthesizer that has been fully serviced and is in great working condition. This keyboard synthesizer features 61 synth keys, with CV In, MIDI (DIN) In, and MIDI (DIN) Out input/output ports for easy connectivity. The Prophet 600 is a top-of-the-line model from Sequential Circuits, with a range of features including a pitch wheel, modulation wheel, and arpeggiator. Ideal for both beginners and professional musicians, this Sequential Prophet 600 is a must-have for anyone looking for a high-quality analog synthesizer. Its stylish design and reliable performance make it perfect for use in any musical setting. So go ahead and create your masterpiece with the help of this amazing synthesizer today!"

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Sequential Circuits Prophet 600 Serviced With GliGli SN 4421

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Sequential Circuits Prophet 600 Synthesizer With GliGli Mod SN 4894

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Sequential Circuits Prophet 600 SN 874

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"Completely re-capped in 2019, with new lithium battery installed at that time. Includes Forge (by Anvil) hard case, original manual, and gligli mod installed (but also includes original chip). Sounds amazing, and everything works as it should."

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Behringer Pro 800 vs Prophet 600 // SOUNDS ONLY

video upload by Starsky Carr

"While I'm putting the finishing touches to my full comparison video here's some sounds to demo the similarities and differences between the Behringer Pro-800 and an original vintage Prophet 600 with the GLiGLi upgrade.

Simpler tones can be copied easily as the raw tone is all there in the oscillators. The filter envelope amount, sustain and cutoff work together slightly differently than the original so adding filter envelopes makes things a little more difficult, add to that the linear envelope shapes aren't the same - GliGLi updated the linear model in 2022 to reflect a more natural Prophet 5 Rev1/2 curve but this isn't in the Behringer. Plus Behringer have made the Pro-800 snappier, so the envelopes are not going to match on every occasion... not an issue in any way, every Prophet 600 with different GliGli firmware will be slightly different I imagine too... unless everyones updated to the 2022 version.

Other differences include the Poly-Mod, filter and LFO modulation ranges aren't as wide in the Behringer"

Sequential Circuits Prophet 600 With Gligli SN 4464

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via this auction, also on Reverb

"Sequential Circuits Prophet 600 with gligli upgrade in full working condition. Amazing sound and the v2022 gligli firmware update turns this 600 into a hefty Prophet 5 contender. More routing options, more LFO and lfo routung, Prophet 5 type envelopes, "rebounce" that prevents double triggering, more stability, better tuning and so much more! The overlay on the left side of the data membrane panel is for gligli 2.0 but will send a manual of the v2022 update that explains all the routing, operation and execution of all the v2022 functions... that said, most of the text on the 2.0 upgrade is still as it is stated."

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Sequential Prophet 600 61-Key 6-Voice Polyphonic Synthesizer w/ Upgrades

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via this auction, also on Reverb

"Excellent condition, new wood ends, GliGli mod installed with original OS chip taped to the inside, latest RAM module installed, Synthgraphics GliGli overlay, Techsmechs Fatar keybed and upgraded Knob cabs, the whole deal! I also bought the panomod kit but never got around to installing it. It's included in the sale."

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Sequential Circuits Prophet 600 SN 1866

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"This synth has the GliGli Mod installed. (I will also include the original Z80 chip that was in the synth before the GliGli Mod was installed.) I purchased this synth 4 years ago from the Vintage Vibe Electric Piano Co. It has left my studio only a handful of times since then and it functions perfectly. All switches, pots, and buttons work great and actuate as they should (i.e., smoothly and efficiently). The keys are in excellent condition. It sounds incredible and has a character that can't be captured with modern synths. The PolyMod is wicked cool and allows for some synth effects that are truly unique. I have listed the condition as "Excellent" because the synth is in great shape - but there is one noteworthy cosmetic imperfection: the left side (bass end) wood panel has been significantly scratched (it was like that when I purchased it from Vintage Vibe). I have highlighted this in the pictures. It lends character to this instrument and has zero effect on the instrument as such - and can be remedied by replacing the wood side panels with replicas of your choosing or design. The synth comes with the road case featured in some of the pictures and with a power cord. The road case is old but it is still functional and protective."

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SCi Prophet-600 w/ Gligli Firmware

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Sequential Circuits Prophet 600 Synthesizer SN 3967

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"Fully functioning and restored - Sequential Circuits Prophet 600 Synthesizer.. The unit was not working and I held on to it since then. I decided last year in March to have it repaired. It would light up but not boot to program mode. I sent the unit to one of the absolute best technicians possible for this type of instruments. The unit was sent to David Sesnak of Wine Country Productions in San Jose, California. He could not believe how great the condition of this unit was cosmetically. All repairs he made totaled $746. I had him install the GliGli update as well. The wood sides are original."

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SCi Prophet-600 SN 3086

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"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.

gligli firmware 2.00 installed on buyer's request.

Brand new switch panel installed.

Remaufactured wood end panels installed on buyer's request."

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Sequential Circuits Prophet 600 SN 4188 w/ Gligli Mod

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"Fully working and only a few minor blemishes overall. Gligli mod installed.. Comes with power cord, well packed."

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Prophet-600

video upload by rimela

"Multitrack recording of the Sequential Circuits Prophet-600 (with GliGli update). All sounds are from the Prophet except drums."

Prophet 600 vs Prophet 5 // Is the 600 a better value option?

video upload by Starsky Carr

Prophet-600 with Gligli upgrade.

"Is the Prophet 600 a viable alternative to the Prophet 5? We're here to find out! The Prophet 600 is about £2k cheaper than a Prophet 5 but can it make similar sounds? are they essentially the same synth, same circuits with different interface and a couple of minor differences?

0:00 Intro
1:43 The BIG ONE - Envelopes
5:57 Knob Resolution
9:28 Main Functions
11:31 Poly Mod
13:02 Oscillators
18:41 Filter
22:58 Conclusion"

Synth cat 17:49 in.

Prophet 600 // SOUNDS GREAT but why is it underrated and much maligned?

video upload by Starsky Carr

"Before the release of the Behringer Pro-800 I thought I'd take a look at the original vintage version from 1982. The Prophet 600 gets a really bad press (in some cases it's deserved ed), but the tones are great, and if you can put up with dodgy envelopes and a laggy processor... no-one will notice in a final track :)"

0:00 Intro
2:39 GliGli or not?
8:06 Raw Tones
13:02 Filter
16:44 Poly Mod
17:39 Final Thoughts
18:38 Demo Sounds #1
22:37 demo Sounds #2

Sequential Circuits Prophet 600 w/ GliGli Mod and Teensy ++ SN 4540

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via Switched On Reverb

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"This vintage Prophet-600 is fully functional and in very good condition. This model has been recently serviced and comes with a GliGli Modification and Teensy++.

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 with an LFO that can modulate both oscillators at the same time, the filter frequency, and the pulse width on the oscillator. The Prophet-600 has mono mode with chord memory as well as two one-track sequencers and an arpeggiator. The sequencers are programmed in real-time and cannot be edited. The arpeggiator can be set to the normal up or down modes or can cycle through the keys in the order that they were played.

The GliGli modification adds:

Increased resolution for sound parameters
Faster, smoother amplifier and filter envelope generators
New LFO function generator with a wider range
Dedicated vibrato
Unison detune
Mix Overdrive
Full Midi In control of parameters
Improved tuning procedure"

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SCI Prophet-600 Synthesizer Restored w/ Gligli Firmware

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"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
New Switch Panel installed
Keys, knobs, switches and jacks internal contact cleaning .
Gligli firmware 2.00 installed
Factory 100 sound data installed
Brand New (remanufactured) walnut wood ends installed."

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Sequential Circuits Prophet 600 w/ GliGli Mod

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"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."

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Sequential Circuits Prophet 600 w/ Upgrades Galore

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"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."

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