Ensoniq EXP-4 'The Perfect Piano' expansion board, for MR-61, MR-76, ASR-X

Ensoniq EXP-4 expansion board, for adding 'The Perfect Piano' sounds to your MR-61, MR-76, or ASR-X.   (The ZR-76 comes stock with this board - adding it to an MR-76 makes it equivalent to the ZR-76.)  This expansion board adds 16 Meg of superb acoustic and electric piano waveforms, as well as 115 new sound programs based on these waves.

Includes installation and instruction manual.