B&O Cartridge by soundsmith SMMC4

you have come to the best place for a solution. We are the only manufacturer of these cartridges, and we are authorized to do so under license by Bang and Olufsen. They are fully warrantied against  manufacturing defect for two full years. Want to upgrade your cartridge and performance?  Easily done. The B&O plug-in replacement cartridge design allows use of an interchangeable and wide range of cartridge models and performance for each turntable model - within each of the two groups below. (Group 1 = SMMC1, SMMC2, SMMC3, SMMC4 and The Voice; Group 2 = SMMC20V, SMMC20E, SMMC20EN, SMMC20CL and SMMC20CL+)