Korg M1R EX For Sale. First came the M1 keyboard. Then came the M1R rack mount equivalent. Finally, Korg released the M1REX, an expanded version of the M1-r with many additional waveforms to create a much wider variety of high quality synthesizer sounds.
We fully cleaned, serviced and tested this unit and it's fully functional and sounding / looking great. The internal battery was replaced and the original sounds were reloaded, so you shouldn't have to worry about doing this again anytime soon.