E! Grey Matter for Yamaha DX7II DX7IIFD DX7IID compatible card / Expansion Board

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  • Regular price $133.00

E! Grey Matter for Yamaha DX7II DX7IIFD DX7IID compatible card / Expansion Board

E! quadruples your DX's internal RAM, allowing storage for 256 Voices and 128 Performance memories across 4 Banks. Octal Mode transforms your DX7II into an 8-channel multitimbral sound module. Advanced split and layer options, accompaniment modes, and an 8 Channel Controller enhance versatility. Expanded Data Management facilitates saving/loading of single or all 4 Banks. Engine and SE!quencer modes organise E! functions. The Engine menu, programmable for 128 Performance memories, offers multitimbral features and accompaniment modes. The Sequencer provides a 16-track MIDI recorder.

Installation of the E! Grey Matter circuit board involves opening the synthesiser, extracting the EPROM, and soldering 5 wires. If you are unfamiliar with this we recommend getting a licensed technician to install it for you. Not having the right skills or tools could cause damage to your DX7II/D/FD or the E! Grey Matter board.


This board is only compatible with the Yamaha DX7II DX7IID or DX7IIFD. It will not work in any other Yamaha DX models. 


  • This is a used item. 

  • This expansion card has been tested and is working as it should. 


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. 

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.