Sequential Circuits Six-Trak

“SEQUENTIAL CIRCUITS SIX-TRAK 80’s 6 VOICE ANALOG POLYPHONIC SYNTH WORKS SERVICED. Condition is Used.

80’s Vintage 6-Voice Analog Polyphonic Synthesizer. Fully Serviced. Excellent Condition. 100% Functional.

Unit Description:

For sale is the Sequential Circuits Six Trak, 6 voice analog poly synth. This particular unit is in near-perfect cosmetic shape for an instrument of this age. There are small signs of wear and tear. Missing one screw on the left cheek. Otherwise very, very clean. 100% functional and recently serviced by THE MASTER of Sequential. Coming from a clean, smoke-free studio.” Click here to search for synths on eBay

Sequential Circuits Six Trak

“Sequential Circuits SIX TRAK Synthesizer.
In great working order.
INCLUDES THE ORIGINAL OWNERS MANUAL!
Also have the Latest and final OS/Firmware already installed.
Has some scratches and a chip in one end cheek.
Rock solid and stable, not glitchy like some vintage synths can be.
I have used this in my studio here and there for several years, selling it now since I no longer
use it much and to simply raise money for a few other synths I would like to add to my studio.
It holds all its memory and patches, no problem, all keys play just fine.” Click here to search for synths on eBay

Sequential Circuits Six-Trak

“For Sale/Auction is the Sequential Circuits Six Trak, 6 voice analog poly synth. This particular unit is in good shape for an instrument of it’s age. There are small signs of wear and tear, some scratches in the wood end cheeks, and a few dings on the metal exterior. The main volume pot does have a slight scratch to it, although I’m trying to clean that up before it ships. Also, the previous owner did a repair to the main tune knob, it’s either glued in place in a neutral tuning, or hard to move. This does not affect the synth whatsoever, merely mentioning it for the sake of honesty. Aside from these issues, the synth is working 100% normally, to the best of my knowledge. I have had this synth for over 10 years, and recorded with it in various smoke-free home studios.” Click here to search for synths on eBay

Sequential Circuits Six Trak

“Vintage Sequential Circuits SIX TRAK 6 , Analog Synthesizer with case! In very good cosmetic condition, but I cannot figure out how it all works. I have made patches and sometimes it stores them and sometimes not. Also cannot figure out how the sequencer works. All keys seem to work fine and I have been able to make some really nice sounds from string synth to weirdo harsh stuff. Maybe it has issues or maybe I just can’t figure it all out?
Thus selling as-is, no returns for less than market value. Case is an excellent fit and will make the shipping secure, but expensive.”
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Sequential Circuits Six Trak

“This sale is in aid of my local Hospice Thrift Store, where I volunteer working on electronics. I sell items here for the store that don’t readily sell in house, alongside my normal vintage audio business.

Along with the more routine items that the generous donors contribute is the occasional gem and this is a fine example, a Sequential Circuits Six-trak.

I’ve occasionally dealt in synthesizers over the years but never had the pleasure of checking out an analog synth of this level. Fortunately the manual is available on line and I’ve checked every control and display, checking tuning, level controls, polyphonics, parameter change (I had a lot of fun with the glide parameter set to max and the arpeggiator), recording and playback, including getting two tracks recorded and playing back simultaneously. Audio output was clean.

I haven’t checked the midi functionality and offer no warranty in that respect, however you may draw the conclusion that a full check out as noted above makes that low risk. If you are local, I’d be happy to arrange for you to check out midi yourself BEFORE purchase.

This will be shipped carefully packed using closed cell foam (not expanded polystyrene) to secure and protect the keyboard.”
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Sequential Circuits Six-Trak

“Sequential Circuits Six-Trak Synthesizer w/ OSC Output Mod/New Firmware/Battery. Condition is Used.

Six-Trak synth in solid physical condition. Everything works, plays and sounds great. The battery has been replaced and all contacts have been cleaned. Surface marks & scratches are visible, and the mod wheel has a crack going across the surface. Please see photos. This does not affect playback or use.

The inside is a small DIY mess of wires and breadboards to make the separate outputs possible. If this is a concern, message me and I can open it for photos. There is some floor noise when using the separate outputs with quieter sounds, but a gate worked fine.

The mod output with a stacked & detuned unison really makes this synth unique and one of a kind. Unfortunately for me I’m moving and need to limit what I can bring.”
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Sequential Circuits Six Trak

“Selling my Sequential Circuits Six Trak synthesiser. Is a great sounding 6 voice poly synth. This item is a vintage synth – was the first synth to feature midi – and as such has some scuffs to the paint and a chip to the side panel as shown. As a vintage synth be aware the tuning can also drift slightly, however this can be calibrated. Overall the synth sounds great, selling due to underuse. ”
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Sequential Circuits Six-Trak

“Sequential Circuits Six-Trak. 240v VCO synth. Plays perfectly. No audio problems that I could find. On the left-side wooden panel, it has cracked where the screw is and has been re-glued back on. Barely noticeable, but could come off again during transport. Also, the transformer emits an audible hum from the transformer. Not a biggy, but FYI. Defintely sold as is with any and all issues.”
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Sequential Circuits Six Trak

“Listed as fair condition for cosmetic flaws but fully functioning six trak and plays and functions as it was new. Huge analog sounds! Everything has been meticulously gone through. Here is a list of some of the things that are brand new or are identical to factory parts that have been replaced.

Pitch and mod wheel pots

Latest firmware brand new version 14 eprom

Brand new identical to factory internal battery

Freshly loaded factory patches

Brand new rubber key pad contacts

New rubber feet

Cleaned and serviced inside and out

All rubber buttons have been inspected and cleaned as well as board contacts

New power cord looks like the original”
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Sequential Circuits Six-Trak

“Amazing multi-timbal polyphonic analogue synth built in 1984 by Sequential Circuits, with MIDI, on board sequencer, arpeggiator and monophonic unison mode for nice thick sounds. If you’re looking at this listing you probably already know what it can do, but check out this post http://www.vintagesynth.com/sci/stk.php or have a look on YouTube for videos of it in action.

Bought it from my friend a few years back as it needed some TLC and he wasn’t using it, so took it to Synth Prof (synthprof.com) for a full MOT and UK mains conversion, which cost £225 around 2 years ago (if you need specific details of the work that was done I can email Andrew at Synth Prof for more info).

Some minor marks on the wooden end panels but nothing more than you would expect from a machine of this age. Otherwise has been looked after well and not used very often in a smoke free studio.” Click here to search for synths on eBay

Sequential Circuits Six-Trak

“PHYSICAL CONDITION: Good – There is a 4″ strip of wood missing from the top part of the right side panel. There are light scratches and scuffs all along the sides of this synth. All the LEDs light up as they should. All the pots rotate nicely. The master volume pot/knob wiggles slightly from side to side compared to the other knobs. All the push button feel good and the I/O jacks on the back are solid. The keybed’s fast, light action feels great and the keys are level with each other. All the keys are fully intact with no major chips or cracks to speak of except for the Bb/A# key to the left of the middle C which has an extremely small blemish near the middle. The power cord is in great shape with no tears to speak of. Overall, this synthesizer is in good physical condition WORKING CONDITION: Excellent – Works like a champ! All keys, all control knobs, all buttons, all LEDs, both pitch and mod wheel as well as all I/O are working perfectly! Overall working condition is excellent” Click here to search for synths on eBay

Sequential Circuits Six-Trak Project Machine

“Listed as parts. Functional with really strange behavior. Won’t stay in tune. Constant drift and really not sure what’s going on. Patches all sound really off. Swapping voice chips did not resolve this. Currently has ROM 11. Some scratches are shown on the top panel. Two side screws are missing but does not affect stability.”
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Sequential Circuits Six-Trak

“This is for a used Sequential Circuits Six-Trak Vintage Analogue Synthesizer. The body is in decent shape has some nicks and scuffs as shown in picture but nothing major. Keys work perfectly, sounds awesome. The speed knob works fine but i think it has been replaced as it’s a little wonky but still works fine(right knob shown in picture) The 6 key works but sometimes needs to be pressed hard and last-the rubber around the end of the outlet plug is starting to degrade as shown in picture. All that said still works good and sounds amazing.” Click here to search for synths on eBay

Sequential Circuits Six-Trak

“This Six Trak is in very good condition and working perfectly. All controls have great feel and respond accurately. All lights fully functional. All ports and jacks in great shape and connect without issue. Sound is strong and clear. Keys straight and play nicely. Some scuffs and dings on the wood end panels and general signs of age, but overall in very good physical condition. ”
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Sequential Circuits Six-Trak

“This Six Trak is in very good condition and working perfectly. All controls have great feel and respond accurately. All lights and screen fully functional. All ports and jacks in great shape and connect without issue. Sound is strong and clear.

Unit is in excellent physical condition with only light signs of use. Please view photos carefully. We take lots of photos under 1000 watts of camera lights with no filters or post-production.

Sale includes the synth and power supply in a Road Ready flight case. The case is in excellent condition and holds the synth firmly in place. Added padding installed on the top of the case to offer further protection for the synth.”
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Sequential Circuits Six-Trak

“This unit is used, but it is fully functional and has been recently serviced, has new battery for the memories which will provide years of trouble-free service. The power supply capacitors have also been replaced to ensure quiet operation.

I’m selling this unit as is – it is a used instrument, but has been well cared for in my home studio.The side wood panels have a few character scratches and dings as seen in the photos. The unit otherwise is spotless with all knobs, buttons, keys and pitch and glide wheels trouble-free.

The unit is also shipped with USB flash drive with many documents, factory patches, schematics etc included.

It has an upgrade EEROM OSv14 installed which allows for program changes via knob. Also shipped with the unit is the original working factory ROM chip”
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