“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” Click here to visit listing on eBay
” A very capable synthesizer with 99 presets, full parameter control, 6 voice polyphony w/unison, simple classic design, and a six track sequencer built in to the synth! ” 
“This Vintage Six-Trak Synthesizer is fully functional and in Very Good to Excellent Condition. The synth has been well taken care of with all knobs and pads intact. The wood side panels and keys are clean. The keyboard will come in a RoadRunner Flight Case measuring 29 x 18 inches. ”
” Sequential Circuits Six-Trak Vintage Analog Synthesizer. In excellent condition. Everything works on this synth. Volume control is clean, no noise at all…. Thanks for looking!” 
“Six-Trak Synthesizer – Everything works and is in Very Good Condition. Midi settings all set to factory settings using the midi ports. This synth has been well taken care of and all knobs and pads feel like they have experienced low use. The wood side panels are in great shape and the keys are clean. The Inside shows no sign of repairs or abuse. Clean inside and out. Please see the photos. ” 
“lots of very very cool sounds on this thing, from Emerson Lake and Palmer, To 80’s dance.
“Free Shipping on this old vintage synth. been sitting unused for a long time. powers up, its keys work, the programs can be edited and altered. some of the keys (on some patches) sound sharp or flat, with other matching keys. tuning issue? some great patches, both wheels work. all the buttons produce. sounds on this thing can take you back 40 years. some sounds Like Emerson Lake and Palmer. chip in the wood, on the left side panel. sold as is due to its age, and being electronic item. ” 
“Up for auction is my 100% fully functioning Sequential Circuits Six-Trak. It shows relatively minor wear considering its age (see pics). It comes with the original manual.” 
“here im selling the sequential circuits six-trak in very good condition almost without any mark on it
“This Vintage Six-Trak Synthesizer is fully functional and in Very Good to Excellent Condition. The synth has been well taken care of with all knobs and pads intact. The wood side panels and keys are clean. The keyboard will come in a RoadRunner Flight Case measuring 29 x 18 inches. The case has some dings but has kept the keyboard protected. Please see our photos. ” 
” Due to emergency, need to sell some synth stuff. Up for auction is one Sequential Circuits Six Track Synthesizer. This synth is functional and sounds beautiful, but has some issues. First, the rubber chicklet buttons are terrible, they should be replaced. Sometimes you can get them to work. Second, the power switch is stuck in “ON” position. Good news is it also comes with some extras. This auction includes the Sequential Circuits foot pedal switch. This switch is a helpful assist to work around not having to use some of the very finicky buttons. This unit has been upgraded with the Wine Country IC, so it handles standard MIDI. I’ve included the original chip in the tube the upgrade came with. I’ve also included some other Wine Country paperwork and a new capacitor. Despite the issues, I know this machine makes beautiful sounds, but due to personal emergency cannot test all other functionality and this synth is being sold “AS IS.” Thank you.” 
“This unit is in great condition.
” here im selling the sequential circuits six-trak in very good condition almost without any mark on it
” here im selling the sequential circuits six-trak in very good condition almost without any mark on it
“This is a 1983 Sequential Circuits Six-Track six voice analogue synthesizer. It is one of the first analogue synths to include MIDI in and out and has 64 preset sounds. It has six voices that can be stacked individually as well as plays with six-voice polyphony. I am including the original manual. Because of it’s vintage nature it is being sold as is. Everything is tested and working.” 
“For sale is a Sequential Circuits Six-Trak analog synthesizer. Cosmetically the synth is in pretty good condition considering it’s age with only minor scuffs and blemishes, however whenever you throw midi at it it begins to act up, either dead voices start appearing or it cuts out completely until you resit the battery. For this reason it has to be under for repair.” 
” Sequential Circuits Six-Trak Model 610 Vintage Analog Synth with original manuals and guides and Evolution UC33 USB/MIDI controller
“This Six-Trak is in great condition, just came from a recent service and calibration. It is working and sounding great!
“This Six-Trak is in great condition, just came from a recent service and calibration. It is working and sounding great!
“This is a 1983 Sequential Circuits Six-Track six voice analogue synthesizer. It is one of the first analogue synths to include MIDI in and out and has 64 preset sounds. It has six voices that can be stacked individually as well as plays with six-voice polyphony. I am including the original manual. Because of it’s vintage nature it is being sold as is. Everything is tested and working.” 
“This is a Sequential Circuits Six-Trak synthesizer in great working condition. Multi timbral synth with advanced early MIDI capabilities. You can multi stack to get monster analog sounds. It’s got some really nice custom made looks like birch ends. This is the Japanese 100VAC version but the studio I got it from insisted they always used it at 117VAC without issue. I contacted Wine Country because they sell a US transformer for this for only $10 and David Sesnak formerly of Sequential Circuits, emailed me back and advised it’s not necessary, these 100VAC Six-Traks work fine at 117VAC.” 
” This is a Sequential Circuits Six-Trak synthesizer in great working condition. Multi timbral synth with advanced early MIDI capabilities. You can multi stack to get monster analog sounds. It’s got some really nice custom made looks like birch ends. This is the Japanese 100VAC version but the studio I got it from insisted they always used it at 117VAC without issue. I contacted Wine Country because they sell a US transformer for this for only $10 and David Sesnak formerly of Sequential Circuits, emailed me back and advised it’s not necessary, these 100VAC Six-Traks work fine at 117VAC.” 
“Ive put in a good effort trying to get this thing fixed, but I think it’s time to pass it on. Essentially, the main issue is that the sixth channel is screwed up. This usually manifests by not producing any sound whenever you hit a note on the six channel, and unfortunately, it’s kind of unpredictable which you know will be on that sixth channel. You can partially correct the problem by setting the voices to monophonic, but that ruins a lot of the fun. Additionally, some of the numeric buttons aren’t working very well.
“Sounds super awesome and works well. Used very rarely in non smoking studio. Bid with confidence. Starts at .99” 
“SEQUENTAIL CIRCUITE KEYBOARD IN EXCELLANT CONDITION” 
“This is a Sequential Circuits Six-Trak. Powers up, all lights come on but don’t go out. No sound, no response to buttons or keys. Power switch is broken and looks like it has been connected straight through, so it powers up as soon as it is plugged in. All parts appear to be present. Sold as is for parts or repair only. 117 VAC, model 610.” 
“Sequential Circuits Sx trak , superb condition and all working , new battery 
” 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, the Six-Trak boasts six voice polyphony and six VCOs for solid lead, bass, and pad modeling. Throw in an expansive onboard sequencer and single knob for one parameter control to achieve a world of sound right out of the gate.
” 1984 Sequential Circuits Six-Trak in great condition, serial #245. I bought it from a sixth form college last year as the department that owned it was shutting down. I’ve since replaced the memory battery and reloaded the factory presets. The synth is now fully functional with all 6 voices, filter, LFO, amp, sequencer, stack, arpeggiator, wheels* etc working perfectly, and makes some really great sounds in poly, unison and stack modes. It works with a foot controller though I’m not including one.
“Vintage Sequential Circuits Six-Trak in excellent working condition. Very minimal cosmetic wear. Great analog classic sounds! ” 
“This is a vintage Six Trak synth from 1984 in excellent condition! All knobs, sliders and buttons work. No broken or missing keys. It’s super clean.” 
“Good condition . Everything works as should .. Sounds great .” 
“Here is a nice vintage SC Six Trak synth. Looks and sounds great! Recently serviced with zero issues. ” 
“For sale one Sequential Circuits Six-Trak synthesizer in very good working condition. It is a US voltage 110v model
“Awesome little synth. Very flexible despite the somewhat unusual interface. Sounds awesome. Sold as is.”