Alesis HR-16 / Hr-16B Eprom Upgrade Set OS ver 2.0 + Roland Tr808 Sounds Tr-808
ALESIS HR16 and HR16B. Available also have following sound kits for Alesis HR16. Alesis HR-16B Version 2.0 (Original sound kit). Sounds : After installing the eprom upgrade. reverse eprom 16 will go into the socket marked U15.