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Sequential Circuits Multi-Trak

“Bummer to have to let this go, but I’ve no longer the space for a bunch of hardware. Was working last time I powered it on a few months ago, but clearly the battery needs to be replaced. As-is due to age (cosmetically decent, etc…)”
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Sequential Circuits Multi-Trak

“This hard-to-find synth is in very good working and cosmetic condition. There is wear and tear common to units this old. Please see pictures for condition.

It comes with an aftermarket power supply.Condition comments of note:
-The Stack button needs a little more of a push than usual, but otherwise works fine.
-There’s some minor discoloration on the keys and some of the buttons, most visible in the pictures when you look at the first A key. Neither I nor the previous owner could explain it. But the keys work totally fine; it’s a cosmetic that’s never bothered me.
-There’s what appears to be old, dry tape residue on the bottom. Again, never bothered me.

This thing is tons of fun and underrated. It’s a multitimbral 6-voice VCO analog poly. It has the option to use 6 different outputs, and you can stack different voices on top of each other! Pretty neat for a vintage synth!

It also has an onboard chorus. It’s no Juno chorus, but I think it sounds great, and you can control depth and rate.There are also onboard arps and sequencers. They work, but I’ve never used them much.” Click here to visit listing on eBay

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Sequential Circuits Multi-Trak

“This hard-to-find synth is in very good working and cosmetic condition. There is wear and tear common to units this old. Please see pictures for condition.

It comes with an aftermarket power supply.Condition comments of note:
-The Stack button needs a little more of a push than usual, but otherwise works fine.
-There’s some minor discoloration on the keys and some of the buttons, most visible in the pictures when you look at the first A key. Neither I nor the previous owner could explain it. But the keys work totally fine; it’s a cosmetic that’s never bothered me.
-There’s what appears to be old, dry tape residue on the bottom. Again, never bothered me.

This thing is tons of fun and underrated. It’s a multitimbral 6-voice VCO analog poly. It has the option to use 6 different outputs, and you can stack different voices on top of each other! Pretty neat for a vintage synth!

It also has an onboard chorus. It’s no Juno chorus, but I think it sounds great, and you can control depth and rate.There are also onboard arps and sequencers. They work, but I’ve never used them much.

This will be fragile-packed and shipped insured by FedEX for our collective peace of mind. :)” Click here to visit listing on eBay

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Sequential Circuits Multi Trak

“Recently serviced by pro Bay Area tech. Fully functional and sounds great! All new 33 push button tact switches, new battery, internal cleaned, loaded few factory sounds. Can’t find a wav file to do a sysex factory download. Did find a copy of the factory manual and manually loaded the sounds. Will email you the manual so you can save all the factory sounds in it. Minor marks & scratches but overall it is in excellent condition. Includes new replacement power supply from Syntaur, cost $82! ” Click here to visit listing on eBay

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Sequential Circuits Multi-Trak

“See below for youtube link for video on this synth!

This is from around 1985, and have a video below playing it and seems to play great.

This comes with the original power supply which has been modified with its own off and off switch – not sure why as the switch on the keyboard works just fine.

Good cosmetic condition and all the keys play and register nicely. no broken or chipped keys.

The circuit board that the buttons in the “Track” section are connected is loose, just on the left hand side, so when you press the buttons, they sink down a bit. probably just needs a screw tightened inside on that section of circuit board. all the buttons function perfectly – see the video below which shows that issue.

Even though this looks to be in great working condition, I haven’t a clue how to test all the myriad of features so am selling this as is only as I am not a keyboard geek.

Also comes with original soft case, which has stains on it. ” Click here to visit listing on eBay

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Sequential Circuits Multi-Trak

“Super rare Sequential Circuits analog synth and sequencer. If you’re looking you probably know what it is but lots of info online about this one. I’m not really a ‘synth guy’ but inherited this in a studio/partnership divorce. It didn’t have a power supply and wasn’t working so it sat on a shelf for quite some time. But recently I had it fixed, serviced and a custom power supply made by https://synthservice.com/ in London (receipts available). It is now working perfectly. Some wear on the keys as pictured but in good condition for its age.” Click here to visit listing on eBay

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Sequential Circuits Multi-Trak

“This synthesizer will be described to the best of my ability, but
it is very important that you read this whole item description
section and view all pictures as they are part of the description
and so you can know EXACTLY what you are buying.” Click here to search for synths on eBay

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Sequential Circuits Multi-Trak

“Function: 10/10, Cosmetic: 9/10

All functions work and the synth sounds fantastic! Has been serviced and had its internal battery replaced with a new battery holder that takes two AA batteries. As well, the factory presets have been restored, and the battery drain mod has been performed (allows the internal batteries to last for years instead of months). As shown in the pictures, will come with a carrying case (modified guitar case), power supply, as well as an Operations Manual and Midiguide. ”
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Sequential Circuits Multi-Trak

“Sequential Circuits Multitrak Vintage Analog Synthesizer. Condition is Very good , one missing knob , master tune , can be turned without the plastic , all keys are in good shape and overall clean condition, missing power supply so has not been tested .”
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Sequential Circuits Multi-Trak

“Restored recently from wine country, they are known for specializing in sequential circuits repair. Pictures not of actual unit, it’s still in the box packed by wine country so I didn’t want to take it out only for photos. Let me know if you have any questions. Sequential Circuits Multitrak Vintage Analog Synthesizer. Condition is Seller refurbished.” Click here to search for synths on eBay

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Sequential Circuits Multi-Trak

“I bought this damaged synth a while ago in this condition, but I’m unlikely to get around to fixing it up any time soon so selling it on as I need the space. It does not have a power supply and was sold to me as faulty so that is the condition you are buying it in (it requires a 15v AC power supply). There is water damage to the top panel with signs of rust and even some holes, mainly on the left and right edges. I’ve opened it up and the internal parts are pretty clean and tidy though, no sign of water damage there.” Click here to search for synths on eBay

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Sequential Circuits Multi-Trak

“Sequential Synthiser number 00377

Model & serial number 615

I can see no reason why this will no longer work however unable to check as do not have power cable. ”
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Sequential Circuits Multi-Trak

” Up for sale is this rare, vintage 1980s Sequential Circuits Multi-Trak 6-voice polyphonic analog synthesizer. Synth is in overall good condition. Shows minor signs of wear & use. Has a massive sound & really fun to mess with, especially the chorus section! All the parameters seem to function properly, however the Pitch Bend wheel is not working (feels stuck). The ModWheel is working properly though and feels great. Comes with power supply cord.” Click here to search for synths on eBay

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Sequential Circuits Multi-Trak

“Offering up this analog gem. It’s been in the family for decades, but hasn’t seen much use lately.

I have extensive electronics experience, so I serviced it. I cleaned the controls, performed the battery life modification, and installed a new Energizer Lithium battery. Should last 10 years before it needs service again. Other than that it is unmodified and it is a revision “A” board. The patch memory was lost when the battery died, but I programmed a handful of sounds to test out the features. There is a lot of information regarding the original 100 presets online if you are looking to restore the factory samples.

Everything except the “tape drive” functions were tested. All controls, MIDI and audio I/O are 100%.

The power cord insulation is cracked as noted in the pictures. There are scratches on the bottom and a ding or two on the control plate. Otherwise it is excellent!”
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Sequential Circuits Multi-Trak

“The fine item you are considering is a Rare Vintage Sequential Circuits Multi-Trak Synthesizer Model 615 Keyboard No Power Supply. This cool vintage keyboard is being cold “as is” as I do not have a power supply and have no way to test it. My understanding is that these usually have an internal battery which will also need to be changed. The unit came out of long storage, and was quite dusty, but I cleaned it up pretty well, although the pitch bending wheel is still a bit grindy from dust. Cosmetically, the unit makes a nice overall impression, although one corner does show chipping/banging (see photos). Since I have no way to test this rather rare keyboard, I’m selling it “as is” at a low price that reflects that fact. Please see my photos to have a look at this nice item.”
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Sequential Circuits Multi-Trak

“The fine item you are considering is a Rare Vintage Sequential Circuits Multi-Trak Synthesizer Model 615 Keyboard No Power Supply. This cool vintage keyboard is being cold “as is” as I do not have a power supply and have no way to test it. My understanding is that these usually have an internal battery which will also need to be changed. The unit came out of long storage, and was quite dusty, but I cleaned it up pretty well, although the pitch bending wheel is still a bit grindy from dust. Cosmetically, the unit makes a nice overall impression, although one corner does show chipping/banging (see photos). Since I have no way to test this rather rare keyboard, I’m selling it “as is” at a low price that reflects that fact. ” Click here to search for synths on eBay

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Sequential Circuits Multi-Trak Project Machine

“Sequential Circuits Multitrak SCI Vintage Analogue Polyphonic Synthesiser with power unit.

SPARES OR REPAIRS

Unit powers up and all keys and buttons appear to respond but no sound comes out.”
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Sequential Circuits Multi-Trak

“Up for bid is the vintage 80s Sequential Circuits Multi-Trak Model#615 Analog synthesizer in excellent cosmetic condition. New battery just installed by a bay area tech. All the original factory sounds were loaded in. Tested and works perfectly! Just light marks/scratches. Comes with compatible power supply. ”
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Sequential Circuits Prophet T8

“Tunes up, and all of the keys work great, including the velocity/aftertouch. Everything else works perfectly but it is old, so it is being sold as is, no returns. You can come test it out yourself.

Physically it is a bit worn looking The wood side panel has a large chip on the corner as you can see in the photos. and the silk screening has rubbed off in some places along with some paint on the back.

Also, two of the original knobs were missing, so I replaced them with similar looking knobs. One of the original knobs is also missing it’s silver cap, so it’s just pure black.

This is the most expressive keyboard ever! The aftertouch is poly-aftertouch, so each key has individual modulation instead of channel aftertouch like most other keyboards where it affects all voices the same at once. Sounds soooooo good! For a vintage synth you’ll only find this kind of feature in the CS-80 or Rhodes Chroma to my knowledge. Works as a great controller for other synths. The aftertouch has the perfect sensitivity. ”
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