The best way to improve the sound output from a turntable is to upgrade its photo cartridge. The most popular type of phono cartridge is the moving magnet (MM) type, which provides an excellent all-around sound quality. The MM cartridge is relatively inexpensive, and it has the additional benefit that only the stylus, or end of the cartridge, needs to be replaced, rather than the entire cartridge. Choose from a wide range of styli brands to fit most models of turntables. There are also moving coil (MC) cartridges which are more expensive than MM, but they provide a premium listening experience. When they wear out, they involve replacing the entire cartridge, not just the stylus end.