| Term | Definition |
|---|---|
| Magnetic-Planar Loudspeakers | A type of speaker that uses a flat diaphragm with a voice coil etched or bonded to it to radiate sound. If the magnets are both in front of and behind the diaphragm, it becomes a push-pull magnetic-planar. |
| Microfarads (mF) | A measurement of capacitance. |
| Midbass | Mid frequency bass, usually frequencies just above the sub-bass range, from around 100 - 400 Hz or so. |
| Midrange | A speaker, (driver), used to reproduce the middle range of frequencies. A midrange is combined with a woofer for low frequencies and a tweeter for high frequencies to form a complete, full-range system. |
| Millihenries (mH) | A measurement of inductance. |
| Monopole | Any speaker that encloses the backwave of the speaker device even though part of this backwave may be released via a port or duct. The primary radiation at most frequencies will be from the driver front. If the driver is not enclosed it becomes a dipole. |
| MOSFET | Metal Oxide Semiconductor Field Effect Transistors. Used in most modern, quality car audio amplifiers in the power supply (and sometimes in the output stage). MOSFET's run cooler than normal bipolar transistors, and have a faster switching speed. |
| Muddy | Listening term. A sound that is poorly defined, sloppy or vague. For example, a "muddy" bass is often boomy with all the notes tending to run together. |
| Muting | To greatly decrease the volume level. Many receivers and pre-amplifiers have a muting control, which allows the volume level to be cut way down without changing the master volume control. Great for when the phone rings. |
