| You only want the best, which is why you selected | | | | units are designed to pick up the high frequency |
| the BMW 325 or 325i. You bought it for the | | | | sounds that are emitted from the electronic bits |
| aerodynamic design, the fabulous kidney-shaped grilles | | | | stored on the medium on which your song or |
| and distinctive four headlights. There are a lot of | | | | audiobook is recorded. Higher-pitched sounds are |
| features that are great about a BMW, but perhaps | | | | made when the air pressure changes rapidly. These |
| the best is the car's stereo system. There is nothing | | | | quick changes cause the diaphragm in the tweeter to |
| like cruising down the freeway on a summer day | | | | vibrate rapidly, and those vibrations are translated by |
| with your tunes making the drive more like a | | | | the speaker into high-pitched sounds. |
| personal concert venue, especially when your vehicle | | | | The largest drivers are known as woofers. Low |
| of choice is the BMW 325 or 325i. Stereo sound can | | | | frequency sounds are easily picked up by the |
| be improved or wrecked depending in large part on | | | | woofers. Their large size encourages the diaphragm in |
| the speakers you choose to use in your vehicle's | | | | these drivers to move slowly, which is a similar |
| stereo system. High-quality 325 speakers or 325i | | | | motion that low-pitched sounds create in wave |
| speakers rely on woofers, tweeters and midrange | | | | frequency. Woofers are not your best choice to pick |
| drivers to bring you every level of sound frequency | | | | up high frequency sounds because it is harder for the |
| that your music requires for audio excellence. | | | | diaphragm to vibrate faster due to the mass of the |
| As you might recall from your science classes in | | | | cone impeding the movement. The cone is the |
| school, sound is transmitted through air waves, which | | | | structure that holds the diaphragm in place, upon |
| are produced when there are fluctuations in air | | | | which the polarity changes of electromagnetic and |
| pressure. Those waves hit your ear drum, which | | | | permanent magnets create the air movement and |
| works as a flexible diaphragm, causing the diaphragm | | | | vibration. Midrange drivers are in between the sizes |
| to move. Those movements in the diaphragm are | | | | of the woofers and tweeters, and consequently are |
| picked up by your brain and read as sound. The | | | | at the perfect size to easily pick up the sounds in the |
| same theory also is at work in your car's speakers. | | | | middle of the frequency range of sound. |
| The drivers all employ a diaphragm that is designed | | | | The high quality 325 speakers and 325i speakers |
| to pick up different types of air pressure frequencies | | | | contain a woofer, tweeter, and midrange driver. |
| that the driver reads as sound. | | | | These will pick up every nuance of sound on your |
| The very smallest drivers are called tweeters. These | | | | favorite music that you play in your BMW 325. |