“Sequential Circuits Drumtraks. Classic vintage drum machine. In perfect working condition.
Kept in a smoke and pet free studio since I got it second-hand (around 5 years ago)
It is modified with the extra bonus of 4 x 1/4 inch inputs for external drum trigger pads for live performance. Trigger pads can be bought from Roland et al.
There is one plastic button/top missing – for the ‘Slower’ tempo button. I have not had a chance to replace it. But I am sure you can buy a replacement online and put it back on yourself. You can still trigger the button without it though.
Everything else technically is in perfect condition and cosmetically looks great for its age.”
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“Recently refurbished by Cyberwave, having to sell my beloved T8. Full specs can readily be obtained online.”
“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 Prophet 5 Version 3.3 synthesizer in good condition. I am the original owner of this magnificent keyboard. Only used in the studio on countless recordings. Unfortunately this keyboard has been in storage and is due for some maintenance. The keyboard works, all potentionmeters work, all LED works, Pitch and Mod wheels work. Some of the J wires need to be replaced so some keys do not trigger a sound. Also the rubber key stops need to be replaced on the entire keyboard. Not necessary if your’e using MIDI but if your playing it you will get tired of all the key clacking. All of these parts are available at WineCountrySequential or you could have them refurbish the keyboard. The wood casing is in good condition except for a dent on the front rail by the name plate, see photo #5. The Star case is in good condition but needs to be refoamed.
“SEQUENTIAL CIRCUITS MAX synthesizer, no power supply = UNTESTED, 1 button is missing, LEFT SIDE PANEL is CRACKED – needs to be serviced.”
“Pro One Synthesizer, -w- Manual & Case Serial 8405
” Used in working order ” 
“This one is in excellent cosmetic condition and working 100%. Beside the servicing & internal restoration, the bottom metal chassis was professionally repainted and silk-screened as it was pretty ugly and scratched up. Internally, I decided to keep this one stock without adding midi. It is ready to be played and needs nothing!” 
“SCI Pro one J-Wire in very good condition, inspected, clean, full working order. Has been Pro serviced. Used in home studio and handeled with care.
“Sequential Circuits Sx trak , superb condition and all working , new battery
“FOR SALE A 1985 VINTAGE SEQUENTIAL CIRCUITS PROPHET 2000
” 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.
“Fully functional. Recently serviced and cleaned.
“VINTAGE synthesizer! ! Prophet – 5 Rev.3.3 has arrived! PROPHET – 5 is a 5 – pitch polyphonic analog synthesizer which was released from Sequential Circuits Company in 1978. This is REV 3.3. Memory 120 tone color, MIDI loading model becomes. The internal chip is made of CES (Curtis Electromusic Specilities), voltage control”
“It was released models in the mid-1980s.
” 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.
“SEQUENTIAL CIRCUITS PRO ONE SYNTHESIZER
“Classic analog synth with amazing fat leads, lush brass, atmospheric pads and filter sweeps from early-mid 1980s, with MIDI, comes with hard case.
“I recently acquired this from the original owner. I was able to load disks and the samples seem to work fine. All keys seem to be working as well. I was able to use the Arpegiator and Filters. Since I’m not an expert in the keyboard I’m not sure if it’s exactly 100% functional. Sold As-Is. Some of the included disks didn’t load but a lot of them did.”
“Vintage Sequential Circuits Six-Trak in excellent working condition. Very minimal cosmetic wear. Great analog classic sounds! ” 
“Sequential Circuits Drumtraks Drum Machine
“Pro One Synthesizer, (Good Working Condition ) Serial 8405
“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.” 
“It is a compact polyphonic synthesizer with looks reminiscent of Prophet. It was launched in the mid 1980’s, with MIDI installed while manufacturing in this age, patch memory 64 sounds, 8 voice specifications. With a flat design with almost no knobs etc. after DX 7, there is a white board in the center of the body, you can write notes such as patches. It is now difficult to edit sounds, but the sound is an analog sound like SCI.
“SEQUENTIAL CIRCUITS PRO ONE SYNTHESIZER
“Great shape comes in original packaging with power cord, with carrying bag and a Gotcha Covered dust cover that is the wrong size and way to large. Both manuals are included as well.” 
“In good functional condition. Has woodgrain end cheeks instead of the black painted ones. Volume pots are a little scratchy but all functional. There were note stickers on the keys that were removed. Some keys have minor damage, but nothing to hinder performance. Sounds amazing, but I have too many polysynths at the moment.” 
“Good condition . Everything works as should .. Sounds great .” 
“I am reluctantly selling my Pro One. Between a friend and I we have had this classic for over 30 years.
“In good used condition Includes flight case an manual (well used)
“NOT WORKING! Will not turn on. I have owned this synth since it was new for my home studio. See pics for superb cosmetic condition. Never gigged, never left it’s climate-controlled, smoke free environment. I do not know what the issue is, but before it went into storage I tested it and found several keys did not play. This was always played thru MIDI from my DX7, so I didn’t notice this before that. Hopefully someone familiar with these can bring it back to life-these instruments have a wonderfully rich sound and deserve to be played.