Yamaha SY99 Polyphonic 90's Digital Synthesiser Sequencer - 100V

  • Sale
  • Regular price $1,469.00

Yamaha SY99 Polyphonic 90's Digital Synthesiser Sequencer Just Serviced - 100V 

**LISTED AS FAIR AS Floppy Disk Drive does NOT work. Otherwise a great piece!**

The Yamaha SY99 is a synthesiser combining FM and  Advanced Wave Memory 2 synthesis. It features 76 keys, the ability to load user-specified AWM samples into on-board RAM, an effects processor based on theYamaha SPX900, inbuilt sequencer, 32 voices of polyphony (16 FM, 16 AWM2), Multi-stage filter, Arpeggiator, MIDI, Memory storage and so much more. 


  • This is a used unit.
  • This unit is in good physical condition. It only shows some general scratches and wear from use and age. Nothing major. Please see photos. 
  • This SY99 has had a minor service. It is now a pleasure to use.

  • This unit is fully functional, besides the floppy disk drive. A synth savvy person could replace it with another drive, or with the more modern HXC replacement. 

  • The screen is clear and legible. It does not have a backlight.

  • This sale is for the unit only. Nothing else, like spare parts, accessories or cables are included in this sale

  • Please be aware, this unit is 100V. This means you MUST connect it to the correct step-down transformer before powering it on. If you are unsure about this feel free to send us a message as we would be glad to help you source the correct item. We also have some for sale. Please see our other listings



Polyphony - 32 voices: 16 AFM voices, 16 (AWM2) sampler voices

Oscillators - 6 operator AFM synth; AWM2 sample ROM with 267 waveforms

Filter - Multi-stage Time Variant Filters with resonance

Arpeg/Seq - 16 track sequencer, 27,000 note capacity, 99 patterns, 10 songs

Effects - 2 internal digital effects processors with 63 effects

Keyboard - 76 notes

Memory - 128 preset & 128 user patches, 16 preset & 16 user multi-patches

Control - MIDI

Date Produced - 1991


Standard postage within Australia is free. We have tried to estimate express postage, however if you are in a remote area you may incur extra fees. 


International import tax, duty, vat, custom fees or any other charges are not covered by us, nor included in the shipping fees. These are the responsibility of the buyer. 

This unit is huge and heavy, the advertised shipping price to international buyers may be incorrect. Please contact us for a quote. 

Return Policy:

Returns will only be accepted for manufacture defects / faulty items. Please contact us if you have any problems with your purchase and we will strive to work it out with you.

The Lofi Music Team have been providing professional audio solutions, restoration and repairs in the Sydney and Central Coast area for over ten years. Please see our very positive feedback and do not hesitate to contact us with any questions about this item or any other awesome synths you find in our store!