So what s the deal with 6 x 9 car speakers, and why do they have  ways ? What s a  supertweeter,  and why do you want one? Who cares if you have tweeters built in to your speakers? If you ve had any of these questions (or just want us to stop with the rhetoricals), you ve come to the right article. Here we ll discuss a few major points about these speakers: what tweeters and supertweeters are, why you want them and what all the fuss is about ultrasonic sound.

In our lineup of the best car speakers, we collected, tested and rated each of our models on a variety of different features, but we gave quite a bit of weight in our ratings to the frequency response. This criterion essentially rates the breadth of notes that the speaker is capable of producing. Tweeters and supertweeters are the main reasons why some of the speakers we reviewed can reach the exceptionally high frequencies that they do. The number of  ways  a speaker has refers to the number of tweeters and supertweeters that are built into the main driver, as well as the driver itself. Therefore, a  four-way  speaker has the main driver as well as three tweeters or supertweeters.

What are Tweeters and Supertweeters?

A tweeter is a small speaker that targets higher frequencies than standard drivers. These frequencies typically range from 2kHz to 20kHz. The threshold of human hearing is 20kHz, so these are scraping the upper-reaches of what you and I can actually hear. The types of tweeters you ll find in car speakers are usually dome or cone tweeters. Cone tweeters look more like standard speakers, mimicking the conic shape and familiar architecture of mid-range drivers, but in a smaller form. Dome tweeters are, as you would expect, dome shaped speakers that are fitted into a flat, circular base. These two types of tweeters are what produce the highest sounds from your 6 x 9 car speakers.

A supertweeter is a much smaller tweeter. These devices supplement the range produced by standard tweeters while also stretching above this range on occasion. Supertweeters enable these devices to raise the frequency response above the normal level of human hearing. This contributes to the elusive and much-hyped  ultrasonic effect  that we will discuss in a moment.

Why Do I Want Tweeters and Supertweeters?

These tiny speakers do a great deal to fill in the missing pieces of your music experience, especially the high-end range. Mid-range drivers frequently stretch themselves too thin by trying to cover both the lower bass notes as well as the very high notes. Buying a speaker with built-in tweeters and supertweeters allows the mid-range driver to focus on the mid range notes, enhancing both the range and the quality of the sound.

Why Do I Care About Ultrasonic Frequencies?

Tweeters and supertweeters add a layer to music that you can feel rather than hear. Ultrasonic frequencies add an  airiness  to the music that you can detect but not necessarily hear. Audiophiles strive for the balance of clear, powerful low notes and resonant high notes, but frequencies above or below human hearing contribute to the  feel  of the music. Frequently, when a sound is described as  full  or  round,  it is because of its ultrasonic attributes. They add a more realistic aspect to the music, truly making you feel like you re right there.

We hope these brief points have helped you to understand a bit more about car speakers and their mysterious ways. While this certainly isn t everything there is to know about these devices, we assembled this information to give you a glimpse into the intriguing world of mobile audio.

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