Korg Polysix Project Machine

” Retro Gear Shop is a high-end boutique store located in Nashville, Tennessee.

Korg Polysix #393969
For sale is a Korg Polysix for parts/repairs. This is sold as-is. It will need restoration/repairs, our techs are too backed up on other projects right now. No warranties, guarantees, refunds or returns.

**Check out the pictures to make sure you like it. Pictures are of actual item for sale**”
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Korg Polysix Project Machine

“Keyboard turns on and lights up. I plugged in headphones and was able to get a tone. Not sure how to change modes or anything. I was only able to get it to play sound when you press the keyboard. When a key is pressed it continues to play that note. That’s that maximum of my testing abilities. ” Click here to visit listing on eBay

Korg Polysix with KiwiSix Upgrade

” Up for sale, a 1980s Korg PolySix programmable polyphonic vintage synthesizer in perfect working order, augmented with a full KiwiTechnics KiwiSix upgrade kit including upgraded circuit board and power supply.

The KiwiSix upgrade significantly expands overall functionality and mitigates several issues common to the PolySix, including replacing the original KLM-367 circuit board; which are frequently corroded due to the frequent failure of the original nickel-cadmium batteries. The KiwiSix upgrade also provides 512 tone slots, all able to be stored/edited, with 64 preloaded tones. Sequencing capability is increased; 8 separate 124-max step sequences can be edited and stored. Additionally, the KiwiSix enables MIDI functionality, with the ability to independently set the MIDI In & Out channels. The Arpeggiator and Sequencer can both output MIDI, and the Sequencer can be entirely dictated by MIDI input. The internal clock hardware has been overridden and expounded upon; now able to clock the Arpeggiator and/or Sequencer and can optionally generate a MIDI clock. Key Transposition augmentation allows transposition from 1 octave down to 2 octaves up.

Finally, the power supply has been replaced with a proprietary KiwiTechnics design which utilizes modern voltage regulators. Many PolySix units often have extensive damage as a result of years of overvoltage; the KiwiSix Power Supply is KiwiTechnics’ much-needed answer to that issue. Beyond hardware, all future software updates to the system can be downloaded free of charge from KiwiTechnics’ website.

Cosmetically, this unit is extremely unique. It has been painted purple with yellow trim, with a large vintage Batman sticker placed central to the back of the enclosure on top of additional purple-painted tape. The knobs have also been painted purple. There is a fair bit of honest wear across the enclosure, but nothing extending beyond minor nicks and dings. Additionally, some of the yellow spray paint extends to the upper two octaves of keys and cheek.” Click here to visit listing on eBay

Korg Polysix

“Korg Polysix PS-6 61-Key Analog Keyboard Synthesizer – Turns On.

Keyboard turns on and lights up. I plugged in headphones and was able to get a tone. That’s that maximum of my testing abilities.

There’s a spot where the paint was scrapped and there is some surface rust. Has scratches and wear. Selling this keyboard as is. ” Click here to visit listing on eBay

Korg Polysix

“This PolySix had the famous battery explosion, it’s been repaired, but now has an issue with tuning. I’m selling this wonderful synth as I no longer have the time or space to chase the tuning issue, and I had some emergency medical bills come up recently.”
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Korg Polysix

“This is an awesome piece of synth history that would be perfect for your arsenal. It is very good condition, but has signs of uses. This can be seen in the photos. It is fully functional and was recently serviced at our trusted repair shop.” Click here to visit listing on eBay

Korg Polysix

“Korg Polysix Keyboard Synthesizer. Original owner from 1983. Excellent condition. Every key and every button has been checked and works perfectly.

There are two small cracks in the wood on the left hand side. (See photos). The one on top left is barely noticeable. And the one on back bottom left you can’t see when you are using the poly6 because it’s on the bottom part of the unit. Neither effects the sound or the way the unit sits in any way. ”
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Korg Polysix with Kiwisix Upgrade

“Korg Polysix with Kiwitechnics Kiwisix Upgrade.
Here for sale is a Korg Polysix WITH a Kiwisix upgrade. Why so cheap? First, because I want to actually meet the buyer. I’m not going to ship it. We could arrange something where I drive and meet you somewhere. Second, because the Kiwisix upgrade isn’t finished. The Kiwisix board has been installed but the tuning procedure has not been done. Because of this each octave of the keyboard is slightly out of tune. A few keys are not responsive and will need conductive paint applied to them or new rubber key contacts. All of the controls work, but to access some of the additional Kiwisix functions further modifications must be done. All of this is explained in the Kiwisix manual. The keyboard does make audio come out of its outputs as it should. The original KLM-387A board is included, complete with fried traces from where the battery leaked out. The original NEC 8049 chip is also included.” Click here to visit listing on eBay

Korg Polysix

“This is the last of two Korg Polysixes which we have meticulously refurbished over many days. This unit has a new CPU board installed.

The synthesizer has had the following work undertaken:

Keys removed from keyed and individually cleaned, together with the keybed PCB contacts and rubber actuator.
A full PSU recap
New KLM-367A replacement board installed from Synthtronics
All 19 tact switches have been replaced with quality Omron switches.
LED on Manual button has been modded with an amber light together with an amendment to the resistor.
Each knob and switch cap has been through a Retrobrite process (to de-yellow) – it looks stunning.
All potentiometers and switches have been cleaned, lubricated and deoxidised.
Each screw has been removed and deoxidised to give a classy “gun metal” appearance.
Finally, it has fully calibrated and the factory patches re-loaded.”

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Korg Polysix

“I’m selling my beloved Kiwisix modded Polysix.It’s in pretty nice shape for it’s age. There’s a few dings and the sides aren’t perfect but it’s not bad.I installed the Kiwisix mod and went through and followed the calibration procedure in the manual. Now it has midi!I also installed the graphic overly so it’s easier to navigate the Kiwisix mod.If you want to keep it original the overlay just peels off.I took it off and stuck it on again without any issues.The front panel under the overlay is in good shape.” Click here to visit listing on eBay

Korg Polysix

“I found out the sub-oscillator stops working from time to time and it seems to be a loose connector on the replaced board inside the synth. I first discovered this when I took the synth off its stand and placed it on a table. Before that the synth was working completely fine. So i figured out that when the sub oscillator stops, I need to open up the panel and gently touch the appropriate connector on the board, to move it just a little bit and then it all gets back to normal, so I assume it should be rather an easy fix. Nonetheless, I have updated the asking price to reflect that, so now it seems like a great deal for someone, who knows a thing or two about electronics ;)” Click here to visit listing on eBay

Korg Polysix

“Korg Polysix analogue synthesiser….non-modified and in amazing original condition. The common problem with battery leakage was rectified years ago and all circuit boards are free from any contamination. This keyboard has been used by me on several U.K. and European tours and has always been used in a “play in” flightcase, (included) hence the superb condition…also the main keyboard I used on two internationally released albums… Also includes original packing cartons….. ” Click here to visit listing on eBay

Korg PolySix

“Vintage Korg PolySix 61-Key Synthesizer AS IS. Item is in good used condition for its age. Unit has no output. Notes from our repair tech,
“Removed old battery, repaired corroded PC Board traces. Installed new battery holder, NMH batteries. Tried loading programs, LEDS act normally when loading. No output.” SOLD AS IS NO RETURNS.” Click here to visit listing on eBay

Korg Polysix Project Machine

“Korg Polysix Keyboard Synthesizer (non-functional) for parts or restoration.

1980’s Korg Polysix, with Manual. I played this in the late 80’s and early 90’s and has been sitting in the closet for a couple decades. It turns on, lights come on, but has no output. Obvious battery damage, common to the Polysix, on circuit board shown in photos. I do not know if there are issues besides the battery leakage damage. I’ve included photos of the interior as well so you can examine the boards.” Click here to visit listing on eBay

Korg Polysix

“This is the last of two Korg Polysixes which we have meticulously refurbished over many days. This unit has a new CPU board installed.

The synthesizer has had the following work undertaken:

Keys removed from keyed and individually cleaned, together with the keybed PCB contacts and rubber actuator.
A full PSU recap
New KLM-367A replacement board installed from Synthtronics
All 19 tact switches have been replaced with quality Omron switches.
LED on Manual button has been modded with an amber light together with an amendment to the resistor.
Each knob and switch cap has been through a Retrobrite process (to de-yellow) – it looks stunning.
All potentiometers and switches have been cleaned, lubricated and deoxidised.
Each screw has been removed and deoxidised to give a classy “gun metal” appearance.
Finally, it has fully calibrated and the factory patches re-loaded.

In good general condition – please see images for more specific details.” Click here to visit listing on eBay

Korg Polysix Project Machine

” Vintage Korg PolySix 61-Key Synthesizer AS IS. Item is in good used condition for its age. Unit has no output. Notes from our repair tech,
“Removed old battery, repaired corroded PC Board traces. Installed new battery holder, NMH batteries. Tried loading programs, LEDS act normally when loading. No output.” SOLD AS IS NO RETURNS. “ Click here to visit listing on eBay

Korg Polysix

“Korg Polysix Keyboard Synthesizer. Five of the voices, as well as unison work great on this. One voice does not work. It could be a connection inside, but I am not certain. Selling unit as-is and as described. Pictures show cosmetic condition. ”
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Korg Polysix

“Beautiful condition! The sides are not banged up. The key finish is not worn. Never traveled with it- always kept in the house. It does not have speakers. You must connect it to and exterior amplifier, recorder, etc. This is VINTAGE … it is not USB-enabled.

It does have a 1/4″ headphone jack. I have not used this in many, many years. It does turn on. It does play thru my headphones There is static when you turn volume control (typical for potentiometers this age but can be serviced). Turning the various knobs does change the sound output but I do not remember what each should do so I cannot tell you if they are all doing what they were designed to do. This same model sells for quite a bit more from other sellers on Ebay that aren’t even located in the U.S.” Click here to visit listing on eBay

Korg Polysix

“In excellent working condition. All buttons, knobs, and keys work 100%.

Newly installed battery terminal and KiwiSix MIDI Mod. http://kiwitechnics.com/kiwisix.htm

All service performed by Greg Montalbano from Oakland, CA. ” Click here to visit listing on eBay

Korg Polysix

” This is a Synthspa-refurbished Korg Polysix.
Fully working.

Also has new walnut end caps AND front panel (below the keys)… rare for a Polysix!

…So you’ll never have to deal with ugly, chipping particle board so common on Polysix’s – even refurbished ones.

Every one of the 6 voices sounds.
The keys all work.
The filter & envelopes all work.

Also, NO BATTERY LEAKAGE issue (also very common on Polysix’s) since it has a brand new lithium Ion battery installed.

Yep, this is both internally and cosmetically immaculate.” Click here to visit listing on eBay