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Korg Mono Poly

“I checked all the knobs and keys one by one.
This is an analog synthesizer, so it takes about 5 minutes to warm up after turning it on. Please be aware that if you do not know how to handle an analog synthesizer, the sound may not come out correctly.

The hard case has some sticker marks and minor scratches, but nothing major.” Click here to visit listing on eBay

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Korg Mono/Poly

“This unit is part of a large consignment of equipment from a recording studio that recently closed down.

The unit passed basic testing; all functions seem to be working properly. There are marks and wood corners damaged; some residue from an old sticker etc. and a bit dusty here & there but overall pretty good.” Click here to visit listing on eBay

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Korg Mono/Poly

“If you want a professionally restored Mono/Poly, with extras like MIDI, extended functionality, and a custom hardwood case, I sincerely don’t think you will find a better deal than this.

Professionally serviced by Synth Tailor Electronics for the long haul: leaky caps replaced, oscillators tuned up, Tubbutec mod installed for expanded MIDI functionality, maple hardwood case, power supply rebuilt, rubber contacts for the keybed replaced. This is ready to last in your studio for years to come. I am happy to set up a video call if you would like to see the functionality of this synth. ” Click here to visit listing on eBay

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Korg Mono/Poly

“For sale is this Korg Mono/Poly synthesizer, a high-quality keyboard synthesizer made in Japan.This is a classic from the 1980s. This vintage device boasts 44 keys with synth-type keys and has analog capability. It features input and output ports for CV and gate, making it a versatile synthesizer. It is well-maintained and in excellent condition. Get this synthesizer and experience the best of vintage technology.”
Click here to visit listing on eBay

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Korg Mono/Poly

“Looking to sell/trade my Korg Mono/Poly. Functionally, everything is working well. I recently took apart and cleaned the keybed and replaced a few of the key contacts, so they should all be working great! Cosmetically, the front panel is in great shape, but the end cheeks are a little beat up (like on most of Korg’s early 80s synths that used particleboard….) ” Click here to visit listing on eBay

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Korg Mono/Poly

“Korg Mono/Poly vintage analogue synthesiser. Used very little in the last 30 years or so. Just had it serviced by Kent Spong in Surrey.
Fully working with the exception of the pitch bend wheel.
There are a couple of mods – see photos. A carry handle has been added and also some brackets for mounting on a rack stand.
All notes, knobs and LEDs are working and this instrument sounds amazing, especially for fat leads and basses. ” Click here to visit listing on eBay

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Korg Mono/Poly

“Korg Mono Poly 1981.
Perfect condition
Full kit
Excellently working
Awesome synthesizer” Click here to visit listing on eBay

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Korg Mono/Poly

” An immaculate example of the Korg classic. With the midi mod for added functionality. This model was completely overhauled in 2022 with the wood replaced, fully serviced and working perfectly. Looks and sounds the business. ” Click here to visit listing on eBay

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Korg Mono/Poly

“Korg MonoPoly

In great all round condition and fully working” Click here to visit listing on eBay

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Korg Mono/Poly

“Korg Mono/Poly Keyboard Synthesizer Excellent Condition 1981 Vintage Analog.

Listing includes Korg Mono/Poly synthesizer serial no. 376292. Serviced by Greg Klosmon and power cable port modified by him as well. Very well calibrated and maintained. All keys play and oscillators are in tune. Including flight case, dust cover and Kenton Pro Solo II midi to CV converter w/manual. LOCAL PICKUP ONLY.” Click here to visit listing on eBay

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Korg Mono/Poly

“SERVICED recently by local tech and playing great. Great cosmetic and playing VINTAGE Korg Mono/Poly (yes it has tiny chipped key that doesn’t affect anything). This thing KILLS with 4 OSCILLATORS, don’t settle for a toy behringer recreation that doesn’t have that creamy vintage oomph. ” Click here to visit listing on eBay

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Korg Mono/Poly

” Here we have up for sale a Korg Mono/Poly Keyboard Synthesizer WORKS – Fix it or Part it!

Our Synthesizer is in GOOD VINTAGE condition, showing normal use marks with some corner damage – and 7 of the keys do not perform correctly. They are numbered in the pictures – with description of the misfunction listed below.
We do not have all of the correct equipment to completely test this unit.  

Nothing rattles when moving the unit.
We know it powers on, with no issue and completely silent. 

All of the keys, except one, depress and come back with a nice amount of spring.
1 – WORKS – but gets lightly stuck when pressed
2 thru 7 – does not make the board light-up

EVERY SINGLE flip switch moves perfectly with the correct amount of resistance to hold the selection.
EVERY SINGLE knob turns smoothly.
The WAVEFORM and OCTAVE knobs, which have selective stop points, stop in the appropriate spots and hold.” Click here to visit listing on eBay

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Korg Mono/Poly

“Korg Mono/poly, fully operational in good condition aside from some cosmetic damage to the side laminate therefore is priced accordingly. Cash on collection preferred or cleared bank transfer please. Postage is high to cover insurance costs and secure safe packaging” Click here to visit listing on eBay

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Korg Mono/Poly

“Hi, thanks for taking the time to look at this incredible synth.

The monopoly is arguably one of the best analogue synthesisers ever produced.

This particular one has been recently serviced and is considered to be in perfect working order (if for a couple of light marks to the veneer).

It has enjoyed pride of place in my studio for a number of years but it’s time for someone else to enjoy its magical nuances, character and charms.

It comes with a very nice hard case (not original) and fits perfectly, nice addition to have.”
Click here to visit listing on eBay

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Korg Mono / Poly Project Machine

“Vintage Korg Mono Poly Analog Synthesizer W/ Flight Case AS IS PARTS REPAIR. Wooden Case has wear as seen including taped sections. Will need work. SOLD AS IS PARTS OR REPAIR. Overall in decent cosmetic condition as seen in photos.” Click here to visit listing on eBay

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Korg Mono/Poly

“I’m selling my vintage Korg Monopoly (serial 376968). It’s in perfect working order, having been restored 100% to factory specs by Andy at The Synth Professor – (http://www.synthprof.com/wordpress/). It’s a rare and incredible instrument. They don’t come on the market very often, and I’ve never heard of one in this condition.

The metalwork, all screws, pots, switches and wheels are pristine. There are some scuffs to the wooden end cheeks, as you’d expect from a nearly 40-year-old synth. Sonically, it’s perfect; and it’s as close to a brand new Korg MonoPoly as you’ll get.” Click here to visit listing on eBay

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Korg Mono/Poly Project Machine

“Vintage Korg Mono Poly Analog Synthesizer W/ Flight Case AS IS PARTS REPAIR. Wooden Case has wear as seen including taped sections. Will need work. SOLD AS IS PARTS OR REPAIR. Overall in decent cosmetic condition as seen in photos.” Click here to visit listing on eBay

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Korg Mono/Poly

“For sale is my KORG MonoPoly serial number 378518.

Operationally everything works as expected. One or two pots in the filter section (EG and track in particular) had become glitchy and showing symptoms of requiring a good clean. The unit has therefore been recently stripped and rotary controls and key contacts have been cleaned. At the same time tuning has been re-calibrated. This work was undertaken by Electrofix (Bristol).

Cosmetically the keybed and top surface of the synth are in good condition for the synth’s age. The side cheeks have at some time sustained damage on the corners and might benefit from repair or replacement.

At some stage there has been a modification in the form of an additional switch (visible to the left of the Korg logo on the top panel and above the main output volume knob). This purpose of this switch is unclear, the wiring links to the CV in jack – when not engaged the MonoPoly operates perfectly normally.” Click here to visit listing on eBay

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Korg Monopoly

“Korg Monopoly Vintage Synthesizer.
Good condition but but may need a bit of work few keys not working.
I am not an expert on these so would welcome a potential buyer to view before purchasing.” Click here to visit listing on eBay

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Korg Mono/Poly

“Operationally everything works as expected. One or two pots in the filter section (EG and track in particular) had become glitchy and showing symptoms of requiring a good clean. The unit has therefore been recently stripped and rotary controls and key contacts have been cleaned. At the same time tuning has been re-calibrated. This work was undertaken by Electrofix (Bristol).

Cosmetically the keybed and top surface of the synth are in good condition for the synth’s age. The side cheeks have at some time sustained damage on the corners and might benefit from repair or replacement.

At some stage there has been a modification in the form of an additional switch (visible to the left of the Korg logo on the top panel and above the main output volume knob). This purpose of this switch is unclear, the wiring links to the CV in jack – when not engaged the MonoPoly operates perfectly normally.”
Click here to visit listing on eBay

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Korg Mono/Poly

“For sale is a fine example of the classic and rare Korg Mono/Poly Vintage Analogue Synthesizer. If you’re reading this then you probably already know about the mythical powers of the Mono/Poly. Exceptionally powerful 80s analogue synth, capable of very beautiful traditional sounds or completely wild, devastating patches. This thing sounds absolutely dangerous. The warmth, fatness, depth, modulation capabilities, tightness of envelopes and lush screaming filter resonance are unmatched by anything else. It’s just alive – as soon as you switch it on and hear it you know there are spirits living inside it (these spirits can’t be cloned by Behringer! :).Machines like this just have an unpredictability that doesn’t exist in modern gear. That’s what makes them so interesting to our brains/ears. I’ve used 4 different Mono/Poly’s over the years and although all retaining the same voices and capabilities, they have all been slightly different in their character – which is the beauty of them. Composing with this synth is simply joyous – it leads you down a patch of exploration and creativity, particularly because you can’t save or recall patches. It makes you think and learn. It is a very special instrument and is likely to become the centre of your universe if you become its new owner!

This machine was professionally serviced not too long ago – I still have the service notes and invoice, I’ll dig them out and provide them to the buyer. The original flimsy chipboard end cheeks have been replaced with high quality walnut end cheeks and cosmetically the synth is in pristine shape.Working perfectly and sounding incredible. In excellent cosmetic condition for its age. There will be a void in my life once this thing is gone but all good things must come to an end, and I’ll be happy in the knowledge that it will be twisting somebody else’s mind for many years to come.Collection in person is ideal or I can ship with tracking and insurance for the instruments full value for £40.” Click here to visit listing on eBay

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Korg Mono/Poly

“For sale is my KORG MonoPoly serial number 378518.

Operationally everything works as expected. One or two pots in the filter section (EG and track in particular) had become glitchy and showing symptoms of requiring a good clean. The unit has therefore been recently stripped and rotary controls and key contacts have been cleaned. At the same time tuning has been re-calibrated. This work was undertaken by Electrofix (Bristol).

Cosmetically the keybed and top surface of the synth are in good condition for the synth’s age. The side cheeks have at some time sustained damage on the corners and might benefit from repair or replacement.

At some stage there has been a modification in the form of an additional switch (visible to the left of the Korg logo on the top panel and above the main output volume knob). This purpose of this switch is unclear, the wiring links to the CV in jack – when not engaged the MonoPoly operates perfectly normally.” Click here to visit listing on eBay

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Korg Mono/Poly

“For sale is a fine example of the classic and rare Korg Mono/Poly Vintage Analogue Synthesizer. If you’re reading this then you probably already know about the mythical powers of the Mono/Poly. Exceptionally powerful 80s analogue synth, capable of very beautiful traditional sounds or completely wild, devastating patches. This thing sounds absolutely dangerous. The warmth, fatness, depth, modulation capabilities, tightness of envelopes and lush screaming filter resonance are unmatched by anything else. It’s just alive – as soon as you switch it on and hear it you know there are spirits living inside it (these spirits can’t be cloned by Behringer! :).Machines like this just have an unpredictability that doesn’t exist in modern gear. That’s what makes them so interesting to our brains/ears. I’ve used 4 different Mono/Poly’s over the years and although all retaining the same voices and capabilities, they have all been slightly different in their character – which is the beauty of them. Composing with this synth is simply joyous – it leads you down a patch of exploration and creativity, particularly because you can’t save or recall patches. It makes you think and learn. It is a very special instrument and is likely to become the centre of your universe if you become its new owner!” Click here to visit listing on eBay

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Korg Mono/Poly

“Vintage Korg Mono/Poly.
All keys and Oscillators working- Osc 4 will occasionally wander, but in a very musical fashion.
LFO 1 occasionally halts on slowest setting.
Master output pot is a bit crackly, would probably benefit from a squirt of switch cleaner.” Click here to visit listing on eBay

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Korg Mono/Poly

“Just tested. All good. Amazing sounds. All knobs and controls present. Very minor wear and tear. Studio use only.
Double-boxed and wrapped in a cloud of foam and bubbles for a safe trip to its new owner. ” Click here to visit listing on eBay

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Korg Mono/Poly

“Up for sale is an awesome Korg Mono/Poly synthesizer that came out in the 80’s.

This vintage synthesizer works and sounds great, without any issues. It really captures that 80’s analog sound. ” Click here to visit listing on eBay

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Korg Mono/Poly Project Machine

“Korg Monopoly And Parts. Condition is “For parts or not working”.

I have owned this synthesizer since 1989. One too many modifications has rendered this classic synth inoperative and I no longer have the time to try and repair it. Some of the mods that are included with this synth are…

– Brand new switching power supply from https://synthronics.de/

– ModyPoly midi conversion chip included from https://tubbutec.de but not installed. The rear of the case has been modified and the MIDI ports already installed.

– Extra SSM 2044 chip (not sure if the original one is working, but the replacement chip is installed in the synth and I will include the original as well)

The original wood veneer case is in OK shape, but is missing the veneer in spots and it always had a “repaired” corner on the front right side. Check out the pics for more details.

Hoping this baby can get some new life from someone who has the energy to resurrect it!” Click here to visit listing on eBay

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Korg Mono/Poly

“You are bidding on
Vintage KORG MONO/POLY MP-4 Analog Synthesizer
Has been tested and is in great working condition. Has some damage to the outside cabinet as can be seen in the photos.​” Click here to search for synths on eBay

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Korg Mono / Poly

“For sale is a fine example of the classic and rare Korg Mono/Poly Vintage Analogue Synthesizer. If you’re reading this then you probably already know about the mythical powers of the Mono/Poly. Exceptionally powerful 80s analogue synth, capable of very beautiful traditional sounds or completely wild, devastating patches. This thing sounds absolutely dangerous. The warmth, fatness, depth, modulation capabilities, tightness of envelopes and lush screaming filter resonance are unmatched by anything else. It’s just alive – as soon as you switch it on and hear it you know there are spirits living inside it (these spirits can’t be cloned by Behringer! :).” Click here to search for synths on eBay

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Korg Mono/Poly

“If your a keyboard player and your looking at this then you probably already know about the Monopoly’s fat analogue sound.

I have owned this keyboard since 1985. Yes 35 Years. A lot has changed in 35 years but the Monopoly always put smile on my face.

Reason for selling – moving to racks and space. I know I am not going to get the same warmth, flexibility and enormous sound but sometimes you need to make a change and we have had 35 years together.” Click here to search for synths on eBay

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Korg Mono/Poly

“Long version: This MonoPoly is fully functional. I have owned it for about 15 years, during which time a number of servicing actions have been implemented. All of the pots and switches have been treated (Caig) and last week the main PSU smoothing capacitors were replaced (see owner’s manual KLM-376-MP, C13/14 etc.). The PSU rails (+/-15V and +5V) have been recalibrated to within the manufacturer’s original tolerance and the ripple per rail has been measured to be <10 mV.

When I first got my MonoPoly, the front panel screws had rusted, or the surface finish on them had worn off, so I replaced them with button headed socket screws (2.5 mm, see pictures). I have fitted a MIDI interface (MidiPoly, instruction manual/details will be emailed to the winning bidder). This has been done without altering the original instrument, except that now the rear mains subpanel has an IEC mains inlet fitted (rather than a flying lead), with 5 pin DIN MIDI in and out sockets immediately adjacent to it. The front panel (this one is in good condition) is not modified in any sense (no additional switches or controls, for example). All of the original MonoPoly’s functions are kept but fitting the MIDI interface adds the following functions” Click here to search for synths on eBay

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Korg Mono/Poly

“Korg Monopoly . Great condition, sounds amazing and plays beautifully. Haven’t got the space so has to move on!” Click here to search for synths on eBay

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Korg Mono/Poly

“Korg MonoPoly With Midi. Condition is Used but in excellent condition bar one slight scuff on the wooden cheek (see images) works as it should with zero issues. ” Click here to search for synths on eBay

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Korg Mono/Poly

“This synth is in good working condition. Please see photos for full cosmetic detail.” Click here to search for synths on eBay