Moving magnet (MM) and moving coil (MC) are the two main types of phono cartridges. They differ in their construction and how they generate an electrical signal.
Moving magnet cartridges
A moving magnet cartridge has a magnet that is fixed in place and a coil of wire that is attached to the stylus. When the stylus moves through the record groove, it creates a magnetic field that induces a voltage in the coil. This voltage is then amplified and sent to the speakers.
Moving coil cartridges
A moving coil cartridge has a coil of wire that is fixed in place and a magnet that is attached to the stylus. When the stylus moves through the record groove, it creates a magnetic field that moves the coil. This movement of the coil generates a voltage that is then amplified and sent to the speakers.
Advantages of MC cartridges over MM cartridges
- Sensitivity: MC cartridges are typically more sensitive than MM cartridges, which means they can produce a better signal-to-noise ratio. This means that MC cartridges can reproduce quieter sounds more accurately than MM cartridges.
- Transient response: MC cartridges are also known for their better transient response, which is the ability to reproduce sharp, percussive sounds. This is because the moving coil is lighter than the moving magnet, which allows it to move more quickly.
- Soundstage: MC cartridges are also often said to have a better soundstage than MM cartridges. This means that they can create a more realistic and immersive sound image.
Disadvantages of MC cartridges over MM cartridges
- Price: MC cartridges are typically more expensive than MM cartridges. This is because they are more complex to manufacture.
- Impedance: MC cartridges have a higher impedance than MM cartridges. This means that they require a more powerful phono preamp to amplify the signal.
- Tracking force: MC cartridges typically require a lower tracking force than MM cartridges. This is because the moving coil is lighter and can be damaged more easily if too much pressure is applied.
MC cartridges offer a number of advantages over MM cartridges, including better sensitivity, transient response, and soundstage. However, they are also more expensive and require a more powerful phono preamp. Ultimately, the best type of cartridge for you will depend on your budget and your listening preferences.