As a note though and it goes especially for the OM40 where both I and a friend with the same cartridge heard more high frequent noise, like static, when this cartridge/stylus was used. Nothing though on other micro ridge stylii used by AT or JICO. This was not inner groove, but something to do with the stylus friction being high or poor polishing. Above track 2=OM40, track 3=OM10.