The BC9300 does not have an internal RIAA pre-amp, hence you need to get a Beogram with RIAA such as the Beogram 3500, 4500, 6500 and 7000, which all have RIAAs fitted as standard. The Beogram 9500 will not work unless you add a separate external RIAA pre-amp, which then complicates the ability to remote control the deck because the datalink will need to be connected separately.
See this link: https://www.beoworld.co.uk/faq_view.asp?id=18
And the following thread suggests the BG4500 for the best visual match:
https://archivedforum2.beoworld.co.uk/forums/p/35701/265112.aspx#265112