Six-Trak

” Really nice vintage six-voice polyphonic multitimbral synth with a lovely Sequential sound. One of the first ever MIDI-controllable synths and one of the first multitimbral synths too. It has a really neat onboard sequencer where each of the six sequencer tracks can be a different patch. It also lets you assign a different patch to each voice for a unique unison mode of six different patches stacked for every note. Really neat little synth; I’m only selling it because I’m out of studio space!” Click here to visit listing on eBay

” Sequential Circuits Six-Trak Analogue Synth – perfect working order – RARE!.

Midi in and out” Click here to visit listing on eBay

“Sequential Circuits Six-Trak Analogue Synth -Works,but has issues.Synth is in very good condition.It has only been outside my studio twice(I moved)since the 80’s.It has the new OS ver 14.Let you just turn the Program knob to change patches..No more punching numbers.Plus a bunch of other cool MIDI stuff.I will also include the original ver 11 chip too. The unit plays great! You can program patches and save them.The only problems I see are if you use the arpeggiator the notes will play a note lower!??Sequencer will record,but also play a note lower on playback..And the stack a/b won’t do anything.I have 2 of these keyboards.I bought them at the same time in the 80’s.Never changed the batteries(40yrs)!They both are doing the same thing..So maybe the battery has something to do with it.Batteries on Amazon are like $25.Not saying that would fix it,but strange they both are doing the same thing at around the same time.Other than that,it works great. Its in really great shape also!Check out the pictures,Most of the original sounds are still in there.Including some great stacked bass sounds. I bought caps for the knobs that give it a Prophet 5 look.They look very cool in the light..You can take them off,not glued.Unit sounds great…It just needs some effects…They didn’t give you that stuff in the 80’s LOL .Thank you for looking!!!” Click here to visit listing on eBay

“For sale is a Sequential Circuits Six-Trak Polyphonic Analogue Synthesizer. It has 48 keys and is multitimbral, meaning it is capable of playing more than one sound simultaneously and capable of combining up to six sounds, creating complex sonic textures. The rear panel has a monophonic audio output, control footswitch jack, and midi in & midi out jacks. There are user manuals available online to explain the many functions. I am not exactly sure of the production year of this synth, but I believe it was made in the 80’s. In either case, the serial number is shown on one of the photos, so you can look it up online. The battery in this synth has long died. Therefore, I can verify some of the functions but not all and that is the reason I am selling it as is for parts. That said, I plugged it in and powered it up. There is a default sound, so I can verify that all 48 keys work. No broken keys. All Leds light up. You just cannot select any sounds until a new battery is installed and the original sounds are loaded back to the internal memory. The pitch wheel and modulation wheel work perfectly. The master tune and master volume knobs work perfectly. The audio output jack also works perfectly. There is a missing knob for the track volume. Other than that, the front panel looks clean. The right wood panel has a broken corner. A new battery could have this working like new again.” Click here to visit listing on eBay

“Sequential Circuits Six-Trak Polyphonic 48-Key Keyboard / Synthesizer.

Unit powers on, everything appears to work as it should. The button for stack b Is missing.

No stock keys, a very clean/functional machine with those amazing retro tones.

There are scratches and oxidized areas, as referenced in the pics. Unit is sold as-is, with no warranty.”
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“Sequential Circuits Six-Trak Synthesiser.

body is in great condition but the wooden ends have been scratched
they were new but suffered a fall but I think a little creative sanding could sort it out…
Synth works perfectly as it fell during a service..!” Click here to visit listing on eBay

“Had this synth from new since bought in the mid 80’s. The keyboard was serviced by Cyberwave EMS last year and is in excellent working condition. Also in fantastic condition generally as you’ll see from the images. Free to collect of course but I will also deliver for free within a reasonable range of Gloucestershire. Would not recommend using a courier but can send insured if desired.” Click here to visit listing on eBay

“Condition : Used, clean, and fully functional”
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” I’ve owned a few of these over the years. They all have their slight oddities, but this one is in pretty good condition. 

If you’re looking at the listing you probably know what it is already. Sounds like a Prophet 5 for a fraction of the price. ” Click here to visit listing on eBay

“1984 SEQUENTIAL CIRCUITS SIX TRAK SYNTHESIZER :

* does not work = NEEDS SERVICE

* 1 key is broken

* some screws & 1 pot knob are missing

* 110 volts version 

* SOLD AS IS – NO RETURNS” Click here to visit listing on eBay

“Overall good condition considering the age. All buttons and knobs operate. All keys operate. There is wear and tear that can be seen in the photos. This is a very vintage item, so please don’t expect mint condition, but it functions well and sounds AMAZING! It is a little dusty from storage and didn’t have time to deep clean, and that shows in the photos as well.” Click here to visit listing on eBay

“Sequential Circuits “SIX-TRAK” Polyphonic Synthesizer.

Great condition just one key has a hair crack on it not deep see pictures

Works great or your money back” Click here to visit listing on eBay

“What’s included in this lot:
Sequential Circuits Six-Trak Polyphonic 48-Key Synthesizer in original box” Click here to visit listing on eBay

“Sequential Circuits Six-Trak Synthesiser 1984.

This unit is in great condition and works as it should. Sadly the internal battery died so the synth is not storing patches or doing anything interesting other that powering up. Played fine when last used few months ago.

The battery is soldered in but could be replaced with a battery holder . Cheap easy fix, low bargain price. 100 patches can be reloaded via SYSEX bank dump as I have done in the past.” Click here to visit listing on eBay

“Works great. Original owner. Battery backup was replaced with an off-circuit-board battery holder and now uses a CR123 battery instead of the oddball lithium it originally came with. In great cosmetic shape. All buttons and caps are present and working. Very cool classic synthesizer!” Click here to visit listing on eBay

“Sequential Circuits Six-Trak Polyphonic 48-Key Keyboard / Synthesizer.” Click here to visit listing on eBay

“Sequential Circuits Six-Trak Vintage Synthesizer.

This is a great little synth in perfect working condition. As pictured there is one key that’s partially broken and another that is cracked, but this does not affect the key playing the notes. Some scuffs here and there but ultimately in good condition!” Click here to visit listing on eBay

“Howdy!!!

You are bidding on a used “Sequential Circuits Six-Trax” Polyphonic Synthesizer with built-in 6 track sequencer in it’s original factory box with the original owner’s manual.

This vintage 49 key mono Synthesizer is priced to sell!

It’s in 100% working order.

It features “Polyphonic Mode” and “Unison Mode.”

In “Unison Mode” you can use all six oscillators for those big and fat Mini-Moog type Lead and Bass synth sounds!

I am the original owner of this keyboard.

It has been in my studio or it’s box since I’ve owned it.

This unit is in immaculate condition!

There are no scratches or heavy dings on the wood.

There are no scratches on the face or the keys.

There are just a few small blemish scratches on the bottom of the unit from a keyboard stand.

I tried to photograph the scratches as well as I could.

(see attached pictures)”

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“Sequential Circuits Six-Trak Synthesiser Condition: LIKE NEW!.

Belonged to my dad who never actually learned to play. Has only been used a handful of times. Condition is like new and is in perfect working order.” Click here to visit listing on eBay

“This is a joy to own but alas I cannot do it justice. Classic sounding from a time long long and they do not make them like this anymore. Studio use only and recent repair and upgrade.

Looks great with the odd mark and scratch which is to be expected. power is direct from the back to the plug. I have also printed out most of the manual (it is not the original). The joy of playing this is that it is 6 Note poly which was a rarity back then. Most of the tech spec is on line but if you are looking at this piece of history you will know all about it anyway.” Click here to visit listing on eBay

“The Six-Trak was an analogue synthesizer manufactured by Sequential Circuits and released in January 1984. It is notable for beingone of the first multi-timbral synthesizers, equipped with MIDI and an on-board six-track digital sequencer.

– Was used in home studio only, from new.

– Has been in dry storage for many years.

– Fantastic condition with NO wear marks on ether the body, keys, buttons, knobs or transfers.

– No modifications, all original.” Click here to visit listing on eBay

“Tested and FULLY functional! Please see pictures for slightly cosmetic scratches on underside. Free shipping” Click here to visit listing on eBay

“Sequential Circuits Six-Trak Polyphonic 48-Key Keyboard / Synthesizer. Use in excellent condition and working. Right side wood chipped off but was glued back on. See pics. Had scratchy volume pot but a little magic juice fixed that. Comes with gig bag. Ready to go. Thanks for bidding, Tony” Click here to visit listing on eBay

“Sequential Circuits Six-Trak Polyphonic 48-Key Keyboard / Synthesizer. Use in excellent condition and working. Right side wood chipped off but was glued back on. See pics. Had scratchy volume pot but a little magic juice fixed that. Comes with gig bag. Ready to go. ” Click here to visit listing on eBay

“This unit has been used.

This Six-Track is in great condition. It shows some minor wear from use and age. For example some light nicks and scratches. There is nothing major at all, overall it is a nice piece.

This unit has been thoroughly tested and we can confirm it is 100% functional.

Please be aware this unit is 100V. This means it MUST be used with a step-down transformer, not a travel adaptor. If you are unsure about this please let us know. We have some great, compatible step-downs for sale” Click here to visit listing on eBay

“For sale vintage “SEQUENTIAL CIRCUITS SIX TRAK” synthesizer in great condition. Tested, fully functional and works perfectly” Click here to visit listing on eBay

“For sale is a vintage Sequential Circuits Six-Trak. The Sequential Circuits Six-Trak Polyphonic Synthesizer may be labelled as a “beginner model” by the company, but the features and functionality make it a prime choice for any synth enthusiast. Built with 48 velocity-sensitive keys and the same Curtis circuitry found in the company’s more expensive models. This Six-Trak exhibits some heavy cosmetic wear like rusting on the chassis and scratches on the side wooden panels. It’s not in the prettiest cosmetic shape, but it is completely functional and works perfectly.” Click here to visit listing on eBay

“For sale vintage “SEQUENTIAL CIRCUITS SIX TRAK” synthesizer in great condition. Tested, fully functional and works perfectly” Click here to visit listing on eBay

“For sale vintage “SEQUENTIAL CIRCUITS SIX TRAK” synthesizer in great condition. Tested, fully functional and works perfectly” Click here to visit listing on eBay

“This unit has been used.

This Six-Track is in great condition. It shows some minor wear from use and age. For example some light nicks and scratches. There is nothing major at all, overall it is a nice piece.

This unit has been thoroughly tested and we can confirm it is 100% functional. ” Click here to visit listing on eBay

“Sequential Circuits Six-Trak Polyphonic 48-Key Keyboard / Synthesizer.

This synth is fully functional and sounds heavy af!

all lights and outputs work.

Baby is just dusty and needs more use.

Will ship it from my work and nicely secure it.” Click here to visit listing on eBay

“Rare piece of equipment.

Genuine sale,

Good overall condition for the age

A bit of history behind this one (Won’t go in details just know it belonged to a cool producer I knew)

Will be happy it goes to a good musician or producer who will look after it

One split key (replaceable for £7 pounds)” Click here to visit listing on eBay

“Sequential Pro One Analog Synthesizer + Original Box & Manual, Serviced, SCI

The Pro One has been serviced, calibrated and tuned. This includes:

NEW power supply fitted (worth reading up on this online)
NEW capacitors fitted to ensure functional stability
CLEANED key contacts and potentiometers

Cosmetically a small amount of wear here and there as you can see in the pictures.

Original box does not include the original inserts.” Click here to visit listing on eBay

“Sequential Circuits Six Trak Analog Synthesizer Model 610 49-Key Keyboard.

6 voice polyphony and a looping real time sequencer make this synth super fun to play around with.

I just tested every key and button all of which are in working order.
It shows its age a bit, but its in pretty solid condition for an instrument from 1984.

This is one of the first synthesizers to implement MIDI.
MIDI sequencing I/O is supported but not all MIDI message types were established at the time of release.

Comes with 2 alternate firmware chips.
One of them is the same as the installed chip (sixtrackv9p) and one is an update (sixtrackv12).” Click here to visit listing on eBay