via this Reverb listing
"Akai's flagship model at the time.Fully equipped with expansion boards for all slots, including optional CF card reader, ADAT board, USB board, effects board, polyphonic expansion board, and memory expansion. Comes in a valuable original box.This is an optional item that is difficult to find today.Brackets included for mounting in a 19" rack.Parameter operation and data transfer/management from PC via USB. Waveform editing is also possible, and can be used as a digital MTR by taking advantage of the abundant inputs and outputs.The controller screen has some color blurring, but the contrast setting can be changed.Because of its multifunctionality, we have not been able to check all of the functions, but we have performed a basic operation check and found that it works without any problems.There is no floppy disk, so we cannot check the disk operation, but when a disk is selected on the screen, a sound is heard and it responds."
