Korg, Polysix @ 24 February 2018, Comments Off on Korg Polysix Project Machine

“When I bought this synth in 1999, it was already 18 years old. At the time, it was in perfect condition, save for a couple dings in the wood. I used this in several studio albums and it also made more than a few trips to the stage. For about 8 years this was my go-to vintage synth.

As the years passed, I didn’t really play anymore. In fact, it has been in storage, untouched, from 2009-2018. I kind of forgot I had it.

However, when I turn it on today, it doesn’t act the same. What used to be one of my favorite synths is now virtually unrecognizable. There are so many things wrong with it now, it makes me want to cry. I have no idea how to fix it, so that’s why I’m selling it. It makes me sad because I loved this thing back in the day and it’s really cool looking in a studio.

Alas, I will give you a rundown of the things I found wrong today with the Korg Polysix in this listing.


1.) 3-4 of the keys dont trigger sound, this was not true before it was stored, it might be dirty contacts.

2.) The volume knob is somewhat scratchy when turned

3.) The ASDR knobs don’t work correctly. As a result, most of the sounds this synth makes have quick attack, hold as long you press the key and then immediately release when finished. Similar to the dynamics of a brass instrument. However if you turn the ASDR knobs weird things can happen, but not what you’d expect.

4.) Many knobs work sometimes and don’t work other times. Or they don’t seem to be changing the same thing they changed before.

5.) It takes between 5 and 30 minutes for it to get to a state where it can make sound. This is kind of normal (battery issue?) and one of the reasons I stopped using it. “Warm up time.”

6.) It is completely out of tune. While the keys do ascend and descend, none of the notes are a proper interval. An octave is not 12 steps, but more like 11.3 steps. C1 to B2 is almost an octave on this synth. I’ve never seen anything like it.

7.) Some of the buttons are missing. The contacts still work. See pictures for details on the cosmetics.

8.) Sometimes it will start randomly making glitchy and creepy noises on its own. This synth literally seems to have a mind of its own ocassionally.

These are the most obvious bad things I could find. There are probably other issues I don’t know how to test for. Let there be no misconception, this synth is very far from perfect condition and some people might consider it usable for parts only. The only reason I don’t list it as parts only is because it powers up and makes sound and some musicians might be able to use it as-is.


1.) It is the ultimate “weird noise generator.” Because of all the aforementioned problems, it is nearly impossible to get this synth to make anything remotely close to a normal sound. Almost every knob turn results in something unpredictable; however,

2.) The cutoff and resonance filters still work perfectly, every time, and they still sound great.

3.) The arpeggiator, pitch bend wheel, chorus effect and octave knob still works.

4.) It has never had a problem turning on. The power and lights have always worked. It has powered up without issue every single time.

5.) It’s 37 years old and still powers up. That’s gotta count for something right? :)”

Korg, Polysix @ 17 February 2018, Comments Off on Korg Polysix

“Angeboten wird ein Korg Polysix! Das Gerät befindet sich in einem guten optischen Zustand, siehe Fotos. Die Oberfläche sieht sehr sauber aus, so gut wie keine Kratzer vorhanden! An den Holzseitenteilen fehlt vereinzelt der Umleimer, siehe Fotos. Teilweise ist dieser noch vorhanden und kann einfach wieder angeleimt werden.
Leider ist bei diesem – wie fast bei allen noch existierenden Polysix die Speicherbatterie im Laufe der Zeit ausgelaufen. Ein bekanntes Problem, was sich aber wieder beheben lässt – siehe Foto der Platine.”

Korg, Polysix @ 17 February 2018, Comments Off on Korg Polysix Project Machine

“Korg Polysix Analog Keyboard Synthesizer MAYBE JUST PARTS

Korg, Polysix @ 27 January 2018, Comments Off on Korg Polysix

“It is KORG’s six polyphonic synthesizer “PolysIx”.

It is a perfect analog synth, six sound polyphonics with timbre memory.

Before exhibition, we replaced the sound protection battery with a new one, and it has returned to the factory preset tone of KORG.

In addition, 2 chips of VCF [SSM 2044], ordered genuine from overseas and replaced it for a new one.

It also has an arpeggiator and plays a very wonderful sequence.

Although there are small scratches and rubbing with use, I think that the state is a good one considering the times.


perfect working.

It has been tested by musical instrumental shop in Japan.”

Korg, Polysix @ 13 January 2018, Comments Off on Korg Polysix

” This keyboard is in very good condition. Its been tested. Everything works. The battery was changed out about 4 years ago.” Link

Korg, Polysix @ 13 January 2018, Comments Off on Korg Polysix

“230V, no MIDI. Some dents on the wooden sides, minor scratches on the front panel. I tried to spot all of them. They’re not very visible. It looks very nice, works flawlessly and sounds beautiful. Overhauled last year, no battery issue, no scratchy pots, no sticky keys. I kept it in a soft case which I’ll give away with it.” Link

Korg, Polysix @ 23 December 2017, Comments Off on Korg Polysix

“Has one key that doesn’t work!” Link

Korg, Polysix @ 23 December 2017, Comments Off on Korg Polysix

korgpolysix ” The iconic Korg PolySix Synth is for sale. Each of the 6 voices have designed VCO and sub oscillators creating a warm sound, softer and brassy-er sounding than the Juno. Specs include 32 programme storage allowing for recall of user made settings. You can select Saw, Square, Pulse Width and Modulated Pulse Width oscillators. Other features include an arpeggiator with octave, latch and up/down controls and a selection of effects; chorus, phaser and ensemble. This PolySix also has a modded midi input (running on channel 11), allowing it to be controlled by a daw or midi workstation. The PolySix comes with a case and the power cable comes attached. ”

Korg, Polysix @ 16 December 2017, Comments Off on Korg Polysix

“Classic Analog Keyboard (pre-midi). All keys work, sounds nice. But here’s an important issue. You cannot access or save presets. The keyboard works fine in “manual mode” only, which means you can dial in your sound, changing parameters, but you cannot save the sound/patch. Perhaps there is an easy fix, perhaps not. I am just not sure. Other features seem fine to me. The arpeggiator works, the fx section works (and the chorus and ensemble effects are terrific), pitch bend and modulation work. No dead keys. So, the keyboard is being sold as-is. Maybe you want it for parts, maybe for recording, maybe for nostalgia.” Link

Korg, Polysix @ 09 December 2017, Comments Off on Korg Polysix

“For Sale:
Korg Polysix with CHD MIDI upgrade and KIWI CPU and Battery upgrade installation

Comes with MIDI Upgrade manual in physical and digital form
CHD MIDI Upgrade – http://www.chd-el.cz/index.php?id=399&lngid=en
KIWI CPU and Battery Upgrade
Fully cleaned and refurbished, besides a little chip on side wood panels which is very minor.” Link

Korg, Polysix @ 02 December 2017, Comments Off on Korg Polysix

“My Korg PolySix for sale. Built in 1981 it’s older than me. This sounds great, maybe a little scratchy somtimes on the headphone jack but everything works. It has some encap wood damage but nothing that compromizes the structural integrity of the synth. Has some spots on the metal panel that pave paint chipping off and superficial rust that can be cleaned off. There is a button missing the plastic but the button still is pushable and works. Please watch the video I made showing the synth and the blemishes. The synth is priced accordingly to it’s condition. The Red pieces on the keys are pieces of foam tape used to help me remember keys for a song I wrote. It just needs to be taken off” Link

Korg, Polysix @ 02 December 2017, Comments Off on Korg Polysix

“one of my favorite synthesizers…super warm, fun sounding synthesizer .

all the knobs and buttons work and the factory sounds are all reset on it.

There are about 12 or so keys that need to be warmed up, which is simply playing or pushing on them until are up to speed again…takes a few minutes if its not been used for a long stretch. If you don’t warm them up they react really slow, but once you tap on them for a few minutes they work like normal. this is new behavior after having it in storage for a bit. its likely an easy fix, usually just cleaning the contacts or worse case scenario replacing the rubber strips, all in all like a half hour pretty easy job. everything else works fine, and if you use midi, the voices work fine without warming them up. ” Link

Korg, Polysix @ 02 December 2017, Comments Off on Korg Polysix with MIDI

” Korg Polysix keyboard with Kiwisix midi upgrade and power bundle installed by LA Synth Co., which provides midi input/outputs, improved power supply, expanded patch memory, etc. I had it fully serviced and inspected by LA Synth Co. a few weeks ago – key contacts cleaned, pots inspected, etc. Everything works.

For the synth nerds – this Polysix was not a victim of the exploding ni-cad batteries that were factory-installed on these keyboards. The original KLM-367 circuit board that housed these batteries was replaced as part of the Kiwisix power upgrade so there’s no concern about battery acid corroding the circuit board.

If you purchase this synth, I will also ship you the original circuit board and parts replaced with the Kiwisix upgrade just so you have them.

Keyboard has some minor cosmetic wear as seen in the photos but nothing exceptional for a 40 year old synth. The mount that houses the mod and pitch wheel to the left of the keys is a bit loose (see last 2 photos) but has no impact on function or playing. Can be fixed with a few screws if it bugs you but it never bothered me.

It’s been a great synth to own but I decided to sell it because I never play it anymore.” Link

Korg, Polysix @ 25 November 2017, Comments Off on Korg Polysix

“Flawless working condition, some dents on the wooden sides, otherwise looking very nice.” Link

Korg, Polysix @ 21 October 2017, Comments Off on Korg Polysix

“This auction is for one Korg Polysix vintage synthesizer. It is in great shape with just minor dings on the sides. The dreaded battery problem is non-existent here as this Polysix features a brand-new CPU board (+battery). All voices work, effects work, etc. 2-3 keys need a harder press sometimes but that seems to come with the territory with these old rubber-dome keys. This synth sounds phenomenal and huge; a true classic!” Link

Korg, Polysix @ 14 October 2017, Comments Off on Korg Polysix

“Great Korg Polysix that has undergone major restoration. It has a brand new main board (not refurb, new), so no need to worry about the battery leak issue at all. Its been fully cleaned including key bed strip down and re build. The case has few marks and the end cheeks are very good for their age.

The power supply has been converted to 230v with a new toroid transformer. Midi in has been added. Its been fully tuned and is fully working and ready to go.

Classic synth in really great condition. Doubt you could find better.” Link

Korg, Polysix @ 07 October 2017, Comments Off on Korg Polysix

“Here is a Beautiful Vintage Original 1982 Korg Polysix PS-6 Keio Analog Synthesizer Project (for parts or repair) w/ Tapes & Manuals. S/N 388175. This plays and sounds ok but has some super glitchy issues associated with the battery leakage problems that these suffer from. This has had the battery leakage problem and someone attempted to repair the traces. I would suggest a professional repair it, or get a new $400 replacement circuit board available on the net. Cosmetically it looks great as shown. It looks to be complete and original. It comes with the original manuals, color brochure catalog Vol. 1 and three C-7 Patch Tapes. This will make a wonderful addition to anyone’s collection. ” Link

Korg, Polysix @ 30 September 2017, Comments Off on Korg Polysix with KiwiSix Upgrade

“Has the KIWISIX upgrade. NEW BOARD AND BATTERY. CLEAN! many original patches.” Link

Korg, Polysix @ 30 September 2017, Comments Off on Korg Polysix Project Machine

“It powers on but the lights flash all over the place and no sound.” Link

Korg, Polysix @ 16 September 2017, Comments Off on Korg Polysix Project Machine

“Famous analog synthesizer
Owned by my mate from another town
Tested for power on
Produce some sounds
No further testing was done
My mate has no knowledge and technical environment

Selling for parts
No returns and refunds

Photo of inside electronics was done
Seems like everything is in place
100V power
Buyer must search for an apropriate step down converter if using 230V or 117V mains (costs around 20$)” Link

Korg, Polysix @ 02 September 2017, Comments Off on Korg Polysix Project Machine

“Lights up, but does not make. I think it is output transistor. I not sure.”

Korg, Polysix @ 05 August 2017, Comments Off on Korg Polysix

Korg Polysix
Needs maintenance

※Please see 2nd 3rd photos.On them,keyboards put yellow seal don’t work or very low sound.
Please repair them.

※Wooden parts and back above body has some little dents and few rusty points.
Please see 10th, 11th, 12th photos!

It works properly.

Serial Number
Excellent- condition

It has some scratches and little dullness.

weight 11.745kg

This item is 100V 50/60Hz 28W

you may need a power converter depending on your country.
Please refer to the photo for details about its condition.

Inter national buyers

Import duties, taxes and charges are not included in the item price or shipping charges.

These charges are the buyer’s responsibility.

Please check with your country’s customs office to determine what these additional costs will be prior to bidding/buying.

About Us : We are a company dealing with Japan secondhand goods from Japan.

Such as Musical instruments,Audio,Camera,Car,Tires,Fishing tool, Golf Club,Bicycle,Home appliances and anything OK!

Our Mission: We’d like to deliver as many goods as possible to people all over the world.

If you demand for Japanese second-hand goods or find something from Japan,please feel free to ask.

We hope that we contact with as many people as possible all over the world.

If you have any opportunity,please contact with us.

We look forward to meeting you guys!

Thank you very much. Uni Sound from Yokohama in Japan.” Link

Korg, Polysix @ 29 July 2017, Comments Off on Korg Polysix Project Machine

“Physically, the endcaps are pretty banged up as pictured, there are some minor scuffs, scratches etc, and a button cover missing. Not too bad though. Could be restored pretty easily. Functionally, it definetly doesn’t work right. I’m not sure what all is wrong with it. To be completely honest, I didn’t expect it to power up or work at all. I was able to get sound out of it however and what it did sounded good. Definetly not working properly though, being sold as is for parts or repair” Link

Korg, Polysix @ 15 July 2017, Comments Off on Korg Polysix

“Korg PolySix from back in the 80s in excellent condition with padded carry case.

Fully functional with no scratchy pots.

Korg PolySix six-voice analog polyphony with one VCO and sub-oscillator per voice. filters include chorus, phase, and ensemble effects. Excellent resonant filter with sawtooth PW + PWM oscillators. Can also be played in Unison mode with all 6 oscillators as a super thick mono-synth .

With 32-patch memory and arpeggiator controllable with 1,2 or all octave, latch, and up/down controls.

Tape back up to store more patches. Unit ships with ‘backup recovery tape’ to restore the synth to original preset patches.

Really clean, solid unit, comes with protective padded carry case, back up tape and cable.

Unit has a new battery from previous owner so memory works perfectly with no damage to the circuit board.” Link

Korg, Polysix @ 15 July 2017, Comments Off on Korg Polysix

“All pots work well, the programmer works perfectly/saves and recalls patches, circuit board cleaned, internal battery replaced/upgraded and has a midi-in retrofit. A real classic analogue synth and rare to be in this good-a-working condition; the unison mode is huge, the Arp is awesome and because of the Midi retrofit it can be sequenced via a DAW. Kept in a smoke free music studio and cared for like a person. I’m gutted that I’m having to sell this, but I’m having to raise funds.” Link

Korg, Polysix @ 01 July 2017, Comments Off on Korg Polysix Project Machine

“Korg PolySix Analogue synthesizer in desperate need of servicing and some pampering. Think it has the common battery leak problem that seems to plague the PolySix. Can’t say if there is anything else wrong as it doesn’t work. Not too great cosmetically also and would definitely be described as in poor condition. Looks a bit of a project so sold as parts/not working.” Link

Korg, Polysix @ 01 July 2017, Comments Off on Korg Polysix Project Machine

“The rare Korg Polysix. I’m clearing out my synths that need attention. This one has some banged up endcaps, some minor scuffs scratches, as pictured, but it’s not too bad. Could certainly be restored. Functionally, I honestly didn’t think it would power up or make sound, but I was surprised that when I turned it on it did made sound. It has a really nice voice. It definetly doesn’t work properly though, and is being sold as is non-functional for parts or repair only. No returns. Good luck to you, and have a great day!” Link

Korg, Polysix @ 24 June 2017, Comments Off on Korg Polysix

Link Link

Korg, Polysix @ 24 June 2017, Comments Off on Korg Polysix

“My lovley Korg Polysix is up for sale including a cary case, Included in sale will be a Service by a professional well known London tec.

Good working condition with CHK midi upgrade. A few light scratches and a few dings in the wood (particle board) See pics for overall condition. The midi upgrade has repurposed the to tape socket so the case didn’t have to be drilled. Special midi cable will be included.”

Korg, Polysix @ 17 June 2017, Comments Off on Korg Polysix with KiwiSix Upgrade

“Not sure you can get a better PolySix than this.

KiwiTechnics ‘KiwiSix’ CPU Upgrade
KiwiTechnics brand new PSU
Custom power socket and midi connection panel.
Custom handcrafted solid oak case

The solid oak case is brand new, as is the cpu and psu upgrade. Aside from carrying out the upgrades I have fully serviced and calibrated the beast and she is ready to rock.

The KiwiSix CPU mod takes this synth into another dimension, it adds many, many new functions but most importantly gives the PolySix MIDI, and full MIDI CC implementation for complete external control, 4096 steps to each control also.. ” Link

Korg, Polysix @ 10 June 2017, Comments Off on Korg Polysix

“Good condition The accumulater is new, slight wear on corner of wooden case ( see photo)” Link

Korg, Polysix @ 06 May 2017, Comments Off on Korg Polysix

” Korg Poly Six in very good – excellent condition, just serviced. Replaced volume pot, replaced memory battery, charging cap and resistor, installed blocking diode, memory is functional, everything works as it should.” Link

Korg, Polysix @ 15 April 2017, Comments Off on Korg Polysix

p6 “Object of the offer

1x Korg Polysix synthesizer in great optical and technical condition
Serial number: 389050

Wooden case

The case is new
The wood is oak, it is treated by wax/gloss paint

Metal panel, metal parts and keyboard metal plate

New paint (powder coated) and new silkscreen
There are some small scratches on the new paint
Silkscreen inscriptions have some defects: “Intensity”, “Program”, “Programmer”. Check the photos
Almost all metal parts are powder coated to prevent the corrosion
Keyboard metal plate is completely powder coated to prevent the corrosion

Hardware, functionality

The hardware is very clean, there is no dust or dirt on the PCBs
KLM-367A and KLM-370 are new. The old PCBs were replaced because they were corroded. New PCBs ensure greater mechanical stability and electrical contacts. The functions are equivalent to the original boards
The synthesizer is naturally fully working, there are no electrical defects in this unit. So Arpeggiator, Filters, LFO and so on work very well
The whole unit was calibrated. The unit was triple tuned and stays stable and tuned. As well as possible for a Polysix synthesizer
Programmer is fully working and comes with factory sounds
All connectors ale clean and there is no corrosion
Some potentiometers were fully cleaned and treated by potentiometer lubricant to avoid sound “scratching” (e.g. Volume, Cutoff, Reso, Intensity, Tracking)
Keyboard rubber contacts were refreshed, so the keyboard responses great
Tactile switches are new” Link

Korg, Polysix @ 08 April 2017, Comments Off on Korg Polysix

usedkorgpooy “Vintage Korg Polysix Synthesizer. SOLD AS IS FOR PROJECT/REPAIR/PARTS. SOLD UNTESTED. Seems to be missing a couple buttons as seen in photos. Overall in decent cosmetic condition as seen in photos with tons of cosmetic wear.” Link

Korg, Polysix @ 08 April 2017, Comments Off on Korg Polysix Project Machine

p6 “Here today we have a Korg Polysix

The unit powers up but there is no response from the programmer circuits so the synth has no audio output or control of any kind. This unit was opened up and it has the dreaded battery leakage, (See Photos) so will require much TLC to get the programmer board working again. The rest of the synths condition is unknown but all SSM chips are there as well as all other components.” Link