The Science Behind the Sound of the 325 and 325i Speakers on a BMW

You only want the best, which is why you selected the BMW 325 or 325i. You bought it for the aerodynamic design, the fabulous kidney-shaped grilles and distinctive four headlights. There are a lot of features that are great about a BMW, but perhaps the best is the car's stereo system. There is nothing like cruising down the freeway on a summer day with your tunes making the drive more like a personal concert venue, especially when your vehicle of choice is the BMW 325 or 325i. Stereo sound can be improved or wrecked depending in large part on the speakers you choose to use in your vehicle's stereo system. High-quality 325 speakers or 325i speakers rely on woofers, tweeters and midrange drivers to bring you every level of sound frequency that your music requires for audio excellence.

As you might recall from your science classes in school, sound is transmitted through air waves, which are produced when there are fluctuations in air pressure. Those waves hit your ear drum, which works as a flexible diaphragm, causing the diaphragm to move. Those movements in the diaphragm are picked up by your brain and read as sound. The same theory also is at work in your car's speakers. The drivers all employ a diaphragm that is designed to pick up different types of air pressure frequencies that the driver reads as sound.

The very smallest drivers are called tweeters. These units are designed to pick up the high frequency sounds that are emitted from the electronic bits stored on the medium on which your song or audiobook is recorded. Higher-pitched sounds are made when the air pressure changes rapidly. These quick changes cause the diaphragm in the tweeter to vibrate rapidly, and those vibrations are translated by the speaker into high-pitched sounds.