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Korg Poly 800 Project Machine

” KORG POLY-800 Analog Polyphonic Synthesizer Keyboard POLY800 PS-800

Condition: The Poly 800 does not turn on! Great for parts or working project. Missing the adapter

The Black Key is off position a bit “It can get stuck sometimes” but the key does work. Please check photos for accuracy! ” Click here to search for synths on eBay

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Korg Poly 800 Project Machine

” KORG POLY-800 Analog Polyphonic Synthesizer Keyboard POLY800 PS-800

Condition: The Poly 800 does not turn on! Great for parts or working project. Missing the adapter

The Black Key is off position a bit “It can get stuck sometimes” but the key does work. Please check photos for accuracy! ” Click here to search for synths on eBay

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Korg Poly 800

“Vintage Korg Poly 800 Analog Synthesizer Keyboard Synth Polysynth . Condition is Used. Shipped with USPS Priority Mail. In great condition everything functions as it should does not have the power adapter or the battery cover.” Click here to search for synths on eBay

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Korg Poly 800

” As shown. Keyboard powers up with included power supply. When I attempt to load included software tape after pressing “view” keyboard attempts load, (display flickers) but goes to “err” after about 10 seconds. This has been in my closet for about 30 years. Unit sold as is..Power supply,software cassette and manual included.” Click here to search for synths on eBay

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Korg Poly 800 Project Machine

“USED KORG POLY-800 Analog Polyphonic Synthesizer Keyboard POLY800 PS-800 JAPAN. Condition is For parts or not working. ” Click here to search for synths on eBay

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Korg Poly 800

“Unit has cell battery for memory backup

Runs on batteries or adapter

Replaced damaged keys

Cleaned keybed

Added battery cell unit” Click here to search for synths on eBay

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Korg Poly 800 Project Machine

“USED KORG POLY-800 Analog Polyphonic Synthesizer Keyboard POLY800 PS-800 JAPAN. Condition is For parts or not working.” Click here to search for synths on eBay

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Korg Poly 800

“We didn’t get to use this keyboard since we bought it for a session last year. It worked perfectly for us and it comes with a 100% money back guarantee. It also comes with a gig bag. (We can’t find the power supply, but it’s a common 9 volt, readily available) There are a few cosmetic marks on the highest Bb key. Other than that, it’s in really good shape, as pictured.” Click here to search for synths on eBay

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Korg Poly 800 Project Machine

“As shown. Keyboard powers up with included power supply. When I attempt to load included software tape after pressing “view” keyboard attempts load, (display flickers) but goes to “err” after about 10 seconds. This has been in my closet for about 30 years. Unit sold as is..Power supply,software cassette and manual included.

I am relisting this. Last buyer won the auction but did not pay. It is because I am a gentleman that I am not posting his name and address..” Click here to search for synths on eBay

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Korg Poly 800 with Moog Slayer Mod

“Korg Poly-800 mk1 with Moog Slayer mod (filter cutoff, resonance, and FM). The internal battery was replaced by a previous owner (probably when the moog slayer mods were done). Works great and is an underrated vintage synth capable of some very warm sounds. ” Click here to search for synths on eBay

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Korg Poly 800 with Moog Slayer Mod Project Machine

“This is a Korg poly 800 synthesizer from 1983. It has been upgraded with the “moogslayer mod” and “FM-800 mod” allowing direct control of the filter cutoff and resonance and also a frequency modulation knob for some cool sounding tones.

Comes complete with soft carrying case.

Unfortunately, when I went to use this recently it will not switch on. I’ve tried using the power supply and also putting batteries in to no avail. I’m sure this is something that someone who knows a bit about repairing synths could probably fix but unfortunately I don’t know how to repair it.

If you think you can fix this or salvage it for parts then grab yourself a bargain! The circuit bent controls made it sound really good and I’ve also got a CD containing a load of extra patches to load in.” Click here to search for synths on eBay

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Korg Poly 800

“As shown. Keyboard powers up with included power supply. When I attempt to load included software tape after pressing “view” keyboard attempts load, (display flickers) but goes to “err” after about 10 seconds. This has been in my closet for about 30 years. Unit sold as is..Power supply,software cassette and manual included.”
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Korg Poly 800

“KORG POLY-800 Vintage Analog Synthesizer. Good Condition.. Condition is Used. ” Click here to search for synths on eBay

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Korg Poly 800 Reversed Keys Version with Moog Slayer Mods

“Vintage Korg Poly 800 8-Voice Polyphonic Synthesizer with Sequencer & Chorus

Great Condition considering age – Reverse Keys Edition.
All sliders, buttons functional and LED display bright.
“Moog Slayer” Resonant Filter retrofitted – wouldn’t exactly call it a Moog Slayer compared to my Voyager or Grandmother but it adds character.
Original Carry Case that has seen better days but protects the synth nicely!
Print out of manual and patch sheets as shown.
Comes with aftermarket matched PSU.

I am selling as “for parts or not working” as the headphone out is quiet and the synth did not initially hold patches until I changed the internal battery.

The main Left and Right outputs are fine.” Click here to search for synths on eBay

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Korg Poly 800

“KORG POLY-800 Vintage Analog Synthesizer. Condition is very good. This item is Used. Fully functional. No Mods. Comes from a non-smoking home. There is no power supply included with this item.” Click here to search for synths on eBay

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Korg Poly 800II

“1985 KORG Poly-800II Digital Analog Synthesizer +Sequencer Effects Poly 800 MkII

Looks good and works great.” Click here to search for synths on eBay

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Korg Poly 800

“making some room

i don’t have the power supply to test this unit …therefore the condition = as-is non working

condition auction and close everything you see in the pictures =
1 Korg poly 800 synth

Being sold as untested/not working ” Click here to search for synths on eBay

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Korg Poly 800

“Synthesizer is good for its age (close to 40 years old!). Some scuffs/scratches + minor areas where the paint is fading. No battery corrosion, everything turns on fine. Used a factory reset to get all original presets. I’m including an official KORG adapter (Center Negative). The synth has not been modified. Keyboard stand is not included” Click here to search for synths on eBay

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Korg Poly 800

“Good Shape Korg Poly 800 Synth. One key has been professionally repaired (see photo) This is a later model of the original that includes a internal battery backup. You wont loose your patches when changing batteries. Some small scratches, but nothing significant. works perfect and battery compartment is clean. Includes A/C power adapter.” Click here to search for synths on eBay

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Korg Poly 800 with Moog Slayer Mod


This vintage synth today is highly sought after of, It was Korg’s answer to the Roland Juno Series, but this one here goes a bit further it was properly upgraded and installed with the Moog Slayer Mod: which massively expand the functionality of the analog filter inside the poly 800 synthesizer. The “moog-Slayer” modification involves externally mounting the trim pots for adjusting VCF cutoff and resonance. With this modification the internal VCF CUTOFF (parameter 41 and VCF RESONANCE (parameter 42) acts as a master setting for the particular patch. The added controls can only sweep down from this setting, so be sure to set them high. BE CAREFUL with this modification the filter will oscillate if the resonance is set to 13 or higher.

Also installed is a Filter Input.The Filter input allows you to run any line level audio signal into the poly 800. The audio will be affected by the VCF, VCA, and Chorus and come out the keyboards main output. This filter input has a level control so that you can mix the audio with the keyboards internal voices. If you want to pass just audio, make a patch here just DCO 1 is on. Turn all the individual tones off (4′, 8′. 16′ etc) make sure the level for oscillator 1 is set pretty high.

Upgraded Blue Display

Brand New Internal Battery installed (good for years), also has a Battery Holder, so internal battery is User Installable.

Generic AC Adapter Included with voltage range from 100-240v

Inputs/Outputs Have Been Cleaned

Unit Works Great” Click here to search for synths on eBay

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Korg Poly 800

“Korg Poly-800

In used condition

Seems to be working okay via power adaptor but doesn’t seem to work with batteries.

Patches seem to be remembered after turning the synth off so I presume the internal battery is okay.

Great fun little vintage poly synth.

Will be shipped in a wooden flight case.” Click here to search for synths on eBay

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Korg Poly 800

“Very Good + Shape Korg Poly 800 Synth. This is a later model of the original that include a internal battery backup. You wont loose your patches when changing batteries. Some small scratches, but nothing significant. works perfect and battery compartment is clean. (fresh batteries). No A/C power adaptor or case.” Click here to search for synths on eBay

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Korg Poly 800

“Korg Poly-800 Vintage Synthesizer Keyboard

Excellent physical condition, but does show some signs of wear on the edges and corners

This includes a power adapter and was tested to power on only. We did not test every function but it appears to be in good working condition.

These vintage synthesizers used coin batteries for their memory modules and these typically will need to be replaced, this may be something that will need to be done with this unit, but not sure.

Includes great little soft travel case that fits the keyboard just right” Click here to search for synths on eBay

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Korg Poly 800

“Works Great, Just like the Day I Bought it! Only thing is when uploading a Patch you might have lightly tap the Tape Enable switch once to see the display LEDs Flickering showing when it “Hears” the DATA, hard to explain but the Flickering LEDs is by design, but once you start loading the other 11 new patches, hearing the new synth sounds, you will understand what I am saying 100%, This is not a issue, Comes with Power Supply, Manual, Original Box, Two Midi cables, Two 6.3mm (or 1/4″ as it’s commonly referred to) mono connector Phono Cables, One Mini PC to Keyboard Mini Phono Data Cable, One Headphone Stereo mini Phono to 1/4 Phono Adapter and (See Pictures) One Factory POLY-800 Patch and ELEVEN MORE POLY-800 Patches !!!!!!!!!” Click here to search for synths on eBay

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Korg Poly 800

Priced to sell, vintage Korg synth. I don’t know anything about these but I’ll try my best to tell you about it. Came to me without a power supply, took it over to a friend’s house and the power supply to his four track cassette worked with it, I took a picture to show that it powers on. Plugged it into an amp and it made sound, all the keys worked. Don’t know how to work all the buttons and didn’t so as not to damage it. One of the black keys is slightly bent, angled in a little, but it works. Battery cover missing” Click here to search for synths on eBay

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Korg Poly-800

“We have this Vintage Korg Poly-800 item it’s used showing normal sings of wear no abuse. We purchased this item in a church sale just as pictured we where not able to test the unit due to not having a power supply for it please keep that in mind we are not 100% that it works thanks for looking.” Click here to search for synths on eBay

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Korg Poly-800 II

“Works well and the lights are bright; it is missing the rear battery cover. Please look at ALL of the photos as they are a part of the description.”
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Korg Poly 800

“You are bidding on a korg poly 800 Synthesizer. It powers on but was not further tested. The power supply included is a replacement. I am including the two tapes i found with it and also the hard case. This synthesizer still looks very nice but since i am unable to test it i am selling as is.”
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Korg Poly 800II

“This item is being relisted due to a time-waster but, surprisingly, 100% feedback pseudo-buyer.

I’m very sorry that none of the other honest bidders had their chance because of a moron.

This is a Poly MKII in very good condition, cleaned from the inside out and with a recently replaced battery.”
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Korg Poly 800

“You are bidding on a korg poly 800 Synthesizer. It powers on but was not further tested. The power supply included is a replacement. I am including the two tapes i found with it and also the hard case. This synthesizer still looks very nice but since i am unable to test it i am selling as is.”
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Korg Poly 800II

“Korg Poly 800 II . Condition is Used. Programmable analogue vintage synthesizer. May have a key or two that might need sprayed, other than that it works good. There is no power supply, been using one similar to it from another keyboard to operate it which was similar to the original one. Bought it wanting to learn how to play, but wasn’t interested in it. ”
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Korg Poly 800

“You are looking at a vintage 1983 or 1984 Korg Poly 800 vintage analog synthesizer. The Poly 800 was the first programmable synthesizer that cost less than $1000. There are several YouTube videos featuring the Poly 800. It can be used with a guitar strap and battery power, too.

This unit powers up with batteries or the included power adapter. It does make sounds with the various patches, but I haven’t tested the programming functions or sequencer. The case is in very good condition for its age, but does show some scuffs and is missing the battery cover (see photos).

Also included is the owner’s manual and original pages of info for each preset patch.”
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Korg Poly 800

“Up for auction is a used Korg Poly800 vintage analog synthesizer. It is fully functional, but cosmetic condition is a little rough (please see photos). There are a number of scratches and places where the paint has been worn off on the top and sides of the instrument. There is also a small dent on the metal cover panel for the joystick.

I have loaded up the original factory patches onto the synthesizer via a tape. I’ve included a CD with the factory patches as a .WAV file as well as a PDF of the user manual and schematics.

Please read the terms and conditions at the bottom before bidding.”
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Korg Poly-800

“Vintage Korg Poly-800 Synthesizer
Very good condition, with some minor scuffs.
Tested and working great. Sliders and knobs are clean with no static.
All keys work. All buttons work.
Includes plug-in power supply.
Internal back-up battery tested and has good voltage (3.3V).

This is a very cool vintage synth from the early digital days. It has digital waveform oscillators with an analog filter. It includes a joystick controller for modulating the DCO (Digitally Controlled Oscillator) pitch and the VCF (Voltage Controlled Filter).

Sound processing includes three digital envelope generators, a noise generator, an LFO, and a chorus effect ”
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