“This beautiful Prophet T8 has just been serviced by David Sesnak at Wine Country Sequential and is fully functional, running the latest OS version 3.8. I have cared well for it in my smoke-free studio for many years. Will ship in the same carefully padded box that Wine Country sent it in. Comes with original manual and dual foot pedal. Cosmetically in good condition – the wood is in good shape save for one noticeable scratch on the right wood cheek, and some scratches on the metal top cover (see photos).” Click here to visit listing on eBay
Prophet T8, Sequential Circuits @ 19 April 2018, Comments Off on Sequential Circuits Prophet T8 Project Machine
“Up for auction is a sequential circuits prophet T8 polyphonic analog synthesizer keyboard for parts
Pieces that are missing/ not functioning :
5 screws in the back
22 knobs
The original pot on the frequency knob on the Lfo – mod section
The switch on the freq A on the Lfo – mod section doesn’t turn on.
You cannot split the keyboard at the moment
Keys:
Two keys on the lowest octave are warped and stuck together.
53 out 76 keys work
When you plug in a midi keyboard all the keys work great
What works:
The sequencer
The presets have been currently installed
All the keys work via midi
The after touch
All eight voices are working
all of the knobs and switches work except for the frequency A switch on the Lfo mod
The tuning button works
Modifications/ Repairs
I painted/ stained all the wood on the sides on the front and in the middle of the keyboard.
I replaced the internal battery
I replaced two of the Voice chips
Again is an “as is” auction. The sounds on this keyboard I must say are pretty amazing. But I will say that I will say that it will take at least $1000 to get this keyboard back up to 100%. ” Click here to visit listing on eBay
“Recently refurbished by Cyberwave, having to sell my beloved T8. Full specs can readily be obtained online.” Click here to visit listing on eBay
“Up for auction is a sequential circuits prophet T8 polyphonic analog synthesizer keyboard parts/ repair as is. I’m going to attempt to list all the things that are functioning/ not functioning. This keyboard probably needs a few thousand dollars to get it up and running.
Pieces that are missing/ not functioning :
5 screws in the back
22 knobs
The original pot on the frequency knob on the Lfo – mod section. It does have another pot on their at the moment, that does work… Its just not the original pot.
The switch on the freq A on the Lfo – mod section doesn’t turn on. Let me rephrase this, it turns on if it is included on a certain preset. But it doesn’t switch on.
Keys:
The first four keys on the lowest octave are warped and stuck together.
53 out 76 keys work
When you plug in a midi keyboard all the keys work great
What works:
The sequencer
The presets have been currently installed
All the keys work via midi
The after touch
All eight voices are working
all of the knobs and switches work except for the frequency A switch on the Lfo mod
The tuning button works
Modifications/ Repairs
I painted/ stained all the wood on the sides on the front and in the middle of the keyboard.
I painted the top portion of the Prophet black
I replaced two of the Voice chips
I replaced the internal battery and I installed all the factory sounds” Click here to visit listing on eBay
“This here is rare and amazing synth. Prophet T8 in GREAT condition!!! 9/10. This synth has after touch, midi, 8 oscillators (opposed to the P5’s 5 oscillators)… The ability to stack patches makes this synth a gnarly Prophet 5 on crack.!!! it also can come up with some very interesting sounds of its own. Down fall is that it’s huge, and old, you wouldn’t want to gig with this. It is a studio synth. Kept in a smoke free studio. Dope, Rare synth. Local pick up welcome! And I will ship. ” Click here to visit listing on eBay
“For sale, a Sequential Circuits Prophet T8 synthesizer. This synth is a beast! If you are considering this, I’m sure you are aware of its capabilities. The only issue I’ve found with it is there are times when a voice, or voices, cut out randomly in a wave-like or LFO fashion where certain keys will not play, but it’s not always the same key. After a couple seconds, the non-playing key will start playing and a different key will become inactive. All of the keys function properly when put in Unison mode. I’ve taken a video to show this behavior that I can send if requested. ”
Click here to visit listing on eBay
“Vintage Sequential Circuits Six Trak synthesizer in good to very good condition, with manual. Pictured stand not included. Built in sequencer. Very versatile parameters, many unique sounds, MIDI.” Click here to visit listing on eBay
” Here is a fine example of the legendary Sequential Circuits Prophet T8 polyphonic synthesizer, at a very competitive price. It is in excellent condition and working perfectly after recent servicing.” Click here to visit listing on eBay
“sequential circuits prophet T8 in amazing condition!!! Has Midi!!! If you don’t know, T-8 is like a prophet-5 but thicker sound and with, weighted keys with velocity and aftertouch,
split/layer double/unison keyboard modes, and a simple
real-time sequencer.This thing is a monster!!!! named “Sequential’s finest analog synthesizer” This is a rare and wonderful synth.” Click here to visit listing on eBay
“sequential circuits prophet T8 in amazing condition!!! Has Midi!!! If you don’t know, T-8 is like a prophet-5 but thicker sound and with, weighted keys with velocity and aftertouch, split/layer double/unison keyboard modes, and a simple real-time sequencer.This thing is a monster!!!! named “Sequential’s finest analog synthesizer” This is a rare and wonderful synth. Local pick up only as it is huge, and delicate. This is a studio synth only. you would not want to gig with something like this.” Click here to visit listing on eBay
This instrument is in pristine condition cosmetically and functionally. It has been in my collection for ten years covered in a non-smoking environment. SN 000664. Due to this being a rare instrument I request that the buyer pay actual shipping and insurance costs.” Click here to visit listing on eBay
“This Sequential Circuits Prophet T-8 is in great condition. The ROMs have been upgraded to 3.7/3.8 from Wine Country Sequential. I replaced all of the foam in the keybed. Two defective voices were repaired, and the oscillator and filter trims are calibrated.
It sounds great! ” Click here to visit listing on eBay
“Fat, thick sounds!!! Analog synth!!!!! MIDI!!… Plus!… You can stack sounds, sequence, and find some very unique tones.This Synth is clean inside and out! It’s a 9/10, if 10 were mint. Sounds amazing!!!!” Click here to visit listing on eBay
“This Synth is clean inside and out! It’s a 9/10, if 10 were mint. Sounds amazing!! You can stack sounds, sequence, and find some very unique tones…
It’s like the original P5, but on crack. LOCAL PICK UP ONLY!!!!! Williamsburg, NY. This piece is old and heavy. Not sure what else to say this synth speaks for itself and is very rare. Just fully serviced by Jun Takeshita, at Main Drag Music, Williamsburg, Brooklyn.” Click here to visit listing on eBay
“Very good condition. New aftertouch, and new key action materials. New caps on filter section. New trim pots on tuning section. Calibrated filters and tuning. Aftertouch works perfect through out entire key range. Original pedals, manual , and case.” Click here to visit listing on eBay
” This beautiful vintage synth has a midi upgrade, all knobs, switches and lights are functional. This keyboard plays great! The keyboard comes with owners manual, pedal, power cord,electrical schematics, rom diagnostic chip, original factory programming cassette. There are a few minor scratches and the wood sides have a small chip in them (shown in pictures) Keyboard comes with “STAR” flight case. Thanks for looking! ” Click here to visit listing on eBay
“Sequential Circuits Prophet T8 in stunning condition (recently serviced) – RARE! With original manual (mint) – S/N 000774
Coming from a lovely, clean non-smoking home studio.” Click here to visit listing on eBay
“Up for bid is the SEQUENTIAL CIRCUITS PROPHET T8 ANALOG SYNTHESIZER -SERIAL NUMBER 1008 – 000340. Just recently fully serviced by a well known professional technician in the Bay area.
SERVICE DONE: (PARTS & LABOR COST $1000 ALONE)
>> Replaced 10 switches and 2 pots.
>> Replaced key “felts” (not really felt, more like rubber)
>> Replace pressure padding
>> Treat key felts, on keys
>> Replaced 1 bad ADC and a CD4051
>> Replaced two 16 pin male DIP connectors and two CEM VCF chips
>> Reload factory presets (from Wine Country)
>> Clean pots and connectors
Some of the original gray colored buttons were replace with black replacements knobs ones. Few knobs are not original. Minor marks/scratches here & there. Some sticker residue. Few screws were replaced. Few small dings in the wood panel. Dent on left rear corner panel (see pix#13). Last 2 keys are a little “clacky” when press but it doesn’t affect function (I will have my tech check it this is an issue. He is out of town until March 25). Overall it’s in good cosmetic condition considering its aged. Tech went through the whole functions. Works & sound awesome!” Click here to visit listing on eBay
“This is a Sequential Circuits T8 polyphonic synthesizer. Electronics have been upgraded and everything works as should. Also has the latest operating system chips put in. Aftertouch and key action all have been restored with new materials and sensors. Very accurate velocity and aftertouch through out the entire key range. Cosmetically the synth is in very good condition. Original box, pedals and manual is included. Service paper work is included also.” Click here to visit listing on eBay
“This Prophet T8 analog synthesizer (Serial 1008-000742, 3.8 Main ROM, 3.7 LS and MS ROM) works but needs some care and repair. It has the following issues that we can detect:
1) Unit has been stored in an Anvil case for around 8 years. The case foam decayed, leaving a sticky residue on the unit. We have cleaned the exterior as best we can, but there is still some slight staining of metal and wooden surfaces and some foam has gotten inside the unit. The black paint or enamel on some of the knobs appears to be loosening. There are some minor scratches on the top lid, and chipped paint on one edge of the lid. One lid screw is missing on the back. The F and G keys in the highest octave have odd spacing, the G key rides a bit high and highest C a bit low but this does not appear to affect play.
2) The Anvil case is solid and sturdy on the outside and has average wear. Inside, its protective foam has deteriorated into sticky powder and has been removed. New foam can be easily purchased and glued in to refurbish the case. The synthesizer will be secured in temporary packaging inside this case for shipment.
3) The T8 has 8 voices. In Split mode, 4 voices are assigned to the right side of the keyboard and the other 4 are assigned to the left. (The point between right and left can be adjusted to any key you choose.) In Single mode, all 8 voices play the sound of your choice (right or left), and in Double mode, a pair of voices (one from the right and one from the left) plays each note, for a total of 4 pairs.
On this particular T8, all 4 voices on the right appear to work properly (for most presets; one preset showed a slight difference in one of the voices). 3 of the voices on the left have some problems. (One of those is different in a minor way). It’s probably just one component in each voice that needs to be replaced. Without replacing them, those voices play sounds, but not the same sound as is desired (one is close but not exactly correct; the other two seem very different). It is possible to disable a voice easily, just hold down a key that’s playing the bad sound, and at the same time hold down RECORD (the red button) and press 7. After that, the disabled voice will not play until the unit is turned off and on again, the processor will just choose a different voice to use instead.)
4) The factory presets have been overwritten. If you get a cassette of the digital data for the presets, you can load them back into the T8 through a cassette port. Or you can save your own presets, of course. (If the LFO amount was turned up high, it was noticeable in most of the presets. Once the LFO was lowered, the presets sounded much better.)
This auction includes the synthesizer, Anvil case, and power cord. Stand in main photo not included.” Click here to visit listing on eBay
“Beautiful Condition, photos show as is ( marks to top never bothered me and this is a removable panel so can be refinished, plus usually a synth sits there, it’s useful for that).
Keyboard has had all new action pieces throughout and all poly pressure and action is A1, and sounds very expressive.
The T8 is basically an 8 voice poly Prophet 5 Rev 3.2, with MIDI and twin processors for fast envelopes, and yet sounds warmer and far, far more expressive. The only downside with the Prophet 5 family was the 5 voices and no velocity, pressure, or even Midi on some.
This was Sequential Circuits Flagship synth while the Prophet 5 was out and as it was more expensive it is also much rarer, only aprox 367 worldwide.
This one is as nice as it gets and I challenge any comparison to the rest of the prophet family.
The keyboard alone being 76 note Wooden hammer action is ideal as a master keyboard.” Click here to visit listing on eBay
“Up for Auction one Prophet T8. This Synth has just been fuly serviced by A Sound Education in Brookfield IL. It is fully functioning and is tune. I put over $600 in the restoration. The wood sides are in fair shape but can be purchased for replacement. This is a monster synth. ” Click here to visit listing on eBay
“Up for Auction one Prophet T8. This Synth has just been fuly serviced by A Sound Education in Brookfield IL. It is fully functioning and is tune. I put over $600 in the restoration. The wood sides are in fair shape but can be purchased for replacement. This is a monster synth.” Click here to visit listing on eBay
“A rare opportunity to offer this Prophet T8 for sale. This synth is in excellent physical condition and is 100% functional.
Prior to sale, the synth has been extensively tested and serviced by my tech. This included the essential procedure for all T8s of replacing all of the keyboard action foams with spec parts sourced from N.E.D. and testing all of the aftertouch sensors. All functions and features work correctly.
The front panel is in excellent condition, very clean and with only a couple of marks.
The top metal panel has some fine marks to it as you would expect.
The mod panel is very clean, with only a couple of small marks on the front edge.
The wooden panels are in really excellent condition with small marks only.
The back panel is excellent, with small marks only.
All knobs, buttons and switches are present, original and function correctly.
All keys are clean and aligned and contact correctly.” Click here to visit listing on eBay
” Deteriorated foam from the Anvil case had adhered to unit. There is some slight staining of metal and wooden surfaces and some foam dust has gotten inside the unit. The black paint or enamel on some of the knobs appears to be loosening. There are some minor scratches on the top lid, and chipped paint on one edge of the lid. One lid screw missing on back. The F and G keys in the highest octave have odd spacing, the G key rides a bit high and high C a bit low but this does not appear to affect play. 2) The Anvil case needs new foam inside. (Unit will be shipped with temporary packaging.) 3) Three of the voices on the left have some problems. This may result from one component in each voice that needs to be replaced. 4) The factory presets have been overwritten. With a cassette of the digital data for the presets, you can load them back into the T8 through a cassette port.See full description for more details” Click here to visit listing on eBay
“Good shape cosmetically and functionally” Click here to visit listing on eBay
“A life-long musician recently passed – this was his pride and joy. This comes from the original owner and includes original manual which is now yellowed with age. Sold “AS IS” which is VERY good condition – see photos for more info. I know very little about this item, but it is in working condition. The very last key droops a tiny bit lower than the others but all are working. See a cut-and-paste description from the manufacturer below. More photos can be sent as needed. I am only seeing 2 others on EBay so this is a rare find indeed. ” Click here to visit listing on eBay
“ALL GEAR IS TESTED AND GUARANTEED TO BE 100%
THE PHOTOS THAT ARE SHOWN ABOVE ARE OF THE ACTUAL ITEM YOU WILL RECEIVE.
NOTE: OS 3.8 / SERVICED BY WINE COUNTRY / THERE ARE COSMETIC MARKS ON THE UNIT THAT WERE TOUCHED UP BY WINE COUNTRY WITH A SHARPIE. DON’T ASK ME WHY THEY USED A SHARPIE BUT THEY DID / LOOKS PRETTY GOOD STILL BUT PLEASE BE AWARE” Click here to visit listing on eBay
“Sequential Circuits Prophet T8 Analog Synth- NEWLY SERVICED
LOCAL PICKUP ONLY (Hollywood, CA) I do not have a case or crate to ship.
This was serviced in October by Ed Miller here in LA. It now in great working condition, no problems or issues. This is quite rare I guess, and it was quite expensive when new over thirty years ago.” Click here to visit listing on eBay
“Up for sale is one used Sequential Circuits Prophet T8 polyphonic synthesizer in excellent condition. This extremely rare synth features weighted keys, polyphonic capability, velocity and aftertouch – a very rare feature for keyboards at the time that this was made. It also has full MIDI capability and a real-time sequencer. The T8 was used extensively by Howard Jones, The Thompson Twins and many other artists. The sounds are unreal. We went through the entire keyboard, up and down and found that the electronics function flawlessly. There is one key that will need attention as it does not seem to be working. It’s the fifth G# up from the bass-side. Everything else is perfect. There are a few dings on the corners and a few light scratches. All in all, this keyboard is in absolutely fantastic shape, considering its thirty years of age! ” Click here to visit listing on eBay
”
for sale is a mint condition T8, the eight voice, split and touch sensitive version of a Prophet 5. Extremely rare, only 300 made.
Weighted Keyboard Synthesizer with factory MIDI,
poly after touch,
stereo outputs,
sequencer,
extensive modulation section, way more than a Prophet 5
This one is technically in absolute perfect condition, EVERYTHING works! Every button, knob, LEDs, no scratchy pots!! Comes with manuals.
There are a few tiny scuffs on the wood as you can see in the picture, there are no indentations, it was like that when I got it 10 years ago, all the metal is clean, no scratches, all the lettering and knobs in perfect condition.
Prefer local pick up or can deliver in or around LA, shipping requires crate and will add about $300.-” Click here to visit listing on eBay
“For sale is a vintage and rare Sequential Circuits Prophet T8 analog synthesizer in very good condition!
A monstrous 8 voice polysynth from SCI, the T8 has a very fat Prophet-5-like tone. This analog keyboard added many illustrious features (for its time) such as full MIDI implementation, 76 full size weighted keys with velocity and aftertouch, split/layer double/unison keyboard modes, and a simple but useful real-time sequencer. Released in 1983, the keyboard features many dynamic enhancements, ie: aftertouch can affect pitch, level, filter or the LFO. It was Sequential’s finest analog synthesizer, some calling it the Rolls Royce of analog synthesizers. Digital control of analog sound with an extremely flexible, intuitive and beautiful design – right down to the wood panels!
Recently had it looked over by synth electrician, Chris Roland, at Offbeat Electronics in Longmont, CO. It checked out extremely well both inside and out. All voices, oscillators, filters and sequencer are working. The circuit boards, battery and internal connections are all solid. So it’s not only in great working condition but playable in every respect. The issues are small. There are a couple buttons not working, a pot could be replaced (it is working but the top snapped off), a couple keys need to be re-weighted. Chris estimated these all to be very minimal and quoted me $200 to fix. I’ve factored that into the price. The black top has some scratches and the wood could polished. A fully restored version of this highly sought after synth sells for almost $5,000 at Wine Country Productions.” Click here to visit listing on eBay
”
Final 3.8 Main ROM Firmware & MIDI Rev. Serial Number 5** (for the buyer only), so one of the last produced.
It is estimated there were only around 600 of these T8’s made in total so certainly a very rare synth.
Ex Sequential Circuits European factory @ Mijdrecht in Holland initially on release around 1984-6.
Never gigged to my knowledge, I’m the 3rd owner & only used by myself in non-smoking studio since 2006
The keys have barely been played in that time as I’m not a musician.
It has worked fine for me in that time but the following work has been done as refurbishment for this sale.
Serviced and calibrated/re-tuned to factory specification. Tunes in less than 5-10 seconds now after 20 minutes warm up.
An ex-BBC tech has replaced the PSU capacitors with long life Phillips ones & checked the power rails to be in spec.
5 front panel tact switches replaced & all 7 rear jack sockets replaced.
New Z80B keyboard CPU fitted. 2 x new Common RAM fitted. 5 x new scratchpad RAM fitted.
All as a precaution for long term health & reliability. (Receipts for all replaced parts here & pictures also.)
Keybed and all keys individually removed & cleaned. (Pictures here to prove.)
After touch works 100% and always has in both Poly & Mono modes. (8 channels of aftertouch in Mono mode.)
Front panel removed & cleaned, as well as all pots.
I replaced three key return hammer/spring/flanges when I bought it in & still have two new spares.
Key bed even over full span of 7+ octaves to within a millimetre. (Spare spacers in Wine Country kit should you need.)
The 128 Factory programs/presets have been reloaded for auction sale and are an excellent starting point for learning the strengths of this machine with reference to the user manual, which illustrates all patches as seen on the front panel.
In addition this T8 comes complete with EVERY possible accessory including some that you wouldn’t find
with stock T8’s on original purchase, as follows:
Original foot pedal.
Original bound user manual & MIDI revision update manuals.
Original preliminary service data complete with RARE full original schematics.
Original technical service manual with tuning procedures.
128 Factory programs cassette from Wine Country and also as sysex files on CD.
Note this final Rev. T8 supports MIDI program dump/load to/from PC via sysex. (No need for cassette loading.)
Wine Country long term survival kit including CEM3360 dual VCA.
Wine Country diagnostics/service ROM & manual.
Even includes a 1 page promotional colour ad from Sequential on release (taken from a UK published magazine.)
Also includes a custom made flight case made by Adam Hall, UK (with an Amptown sticker on it.)
Weighs 48Kg in flight case, less all accessories. A very big & heavy synth that’s for sure…
Mains voltage regulator for 110 or 220V output.” Click here to visit listing on eBay
“For sale is a Prophet T8, designed by Dave Smith at Sequential Circuits.
If you have been waiting to find the perfect T8, this is the one you have been waiting for.
Often described as the “Rolls Royce of Analog Synths,” there is nothing quite like it and it is quite a rare find, especially in this condition.
There were only a few hundred made, estimates range from 350-600. This one is Serial Number 282.
The Prophet T8 had many groundbreaking features such as 76 full-size, weighted keys, with velocity and polyphonic aftertouch. It is regarded by many as the best keyboard ever used on an analog synth. It also has a full MIDI implementation, including transmission of the velocity and aftertouch data, so it makes for a wonderful-feeling MIDI controller. Dave Smith is said to still use one as his main controller.
The sound comes from an 8-voice synth with 16 analog oscillators.
The Prophet was bought new in 1983. Everything is clean and in perfect working order. I even made sure the inside was perfectly clean, and have just serviced the Mod/Pitch wheels. Usage has been very light throughout its lifetime.
It has not been played since the mid-90s, except when I fired it up this month and spent a morning playing to make sure everything works (it does!)
Everything is bone stock; software is 3.3 as it came from the factory. All the factory programs are still in memory.
Includes the original pedals (hard to find!), 3-ring bound instruction manual in perfect condition, and I can throw in some original advertising materials for free if you’re interested (see pics).
Again, all the keys work, I believe all the voices work. I spent a morning playing it recently and it sounded beautiful.
You will not find another T8 in such excellent condition, complete, and one-owner kept.” Click here to visit listing on eBay
“der Prophet befindet sich in einem gutem Zustand nur das Käppchen von einem Knopf fehlt , versuche es gerade zu besorgen !” Click here to visit listing on eBay