It's hard to fit cartridges on the B&O. It only take their own cartridgesLook here: B&O Turntable/Cartridge Lookup Chart
Personally, the B&O TTs were never quite my cup of tea, but they were reasonably well-made and good sounding decks. Some had quite advanced features, even by today's standards, and they are quite a bargain. I have heard a couple of Beogram 8xxx units and they sounded pretty good; certainly better than the P-1 or any other new sub-$600 entry-level deck I can think of.