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Korg Mono/Poly MP-4

Korg Mono/Poly MP-4

Brand: Korg

Regular price £1,690.00 GBP | Inc.VAT: £2,028.00 GBP
Regular price Sale price £1,690.00 GBP
Sale Sold out
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Great example of the perennially popular Mono/Poly for sale. Will be supplied freshly-serviced and in perfect working order.

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Product Description

Covid-19 Update: We remain open but are currently operating at reduced staffing levels to comply with distancing regulations. While most shipments are being delivered swiftly, some services could be impacted and delivery times may be extended. We appreciate your understanding and will endeavour to minimise any delays. Read more…


Superb Korg MonoPoly MP-4 vintage analogue synthesizer for sale in excellent cosmetic condition and perfect working order.

Various options are available with this synth:

Internal voltage change: synth is currently 100v and can be run with an external converter (we supply one for UK/European buyers), but we can swap the internal transformer for either 220/240 or 120v supplies. The cost for this work is £80+VAT.

Tubbutec ModyPoly Upgrade option available: this kit can be added for a cost of £250 + VAT. Video demo below. This kit adds various additional play modes, a free definable arpeggiator, midi in/out, a sustain pedal input and various other features. The kit would need to be ordered and would add to time to complete the synth. Read full details and hear demos on the Tubbutec site. To add the kit please message us after purchase.

Note that this kit can be further upgraded with the ModyPoly HiRes Upgrade to add microtonal support - see details and demos here - note that this adds an extra knob to the front panel. This adds an additional £75 to the cost.

Below are a couple of YouTube clips that demonstrate what this synth can do (with thanks to the uploaders); some effects have been added.


Excellent with minor signs of age only and little wear to the finish on the face. End panels are clean with some wear to the bottom edges. The back has some minor oxidation. See photos for more information on cosmetic condition.

Voltage Information

100v Japanese model. For customers on 220/240v supplies we will supply a high quality step-down transformer free of charge with your purchase - let us know if this is not required. On North American mains (115/120v supplies) this unit will run without a transformer (we run all our tests using 120v power); however, a step-down transformer is recommended for extended use. We do not recommend using cheap, generic Chinese mains transformers - please ask if you have any questions about powering this unit.


For sales in UK/EU the price will include 20% VAT. If you have an EU VAT number (outside the UK) you can enter it at check out to have VAT removed.

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