There are a couple of reasons for that. First of all, the speaker has to move slower and the diaphragm the speaker cone has to move farther to create the sound wave. The speaker enclosure and the woofer interact with each other; so the speaker enclosure is usually designed specifically to match the woofer.
There are several types of designs, but the two basic categories are a sealed enclosure and a ported enclosure. Sealed enclosures try to trap the sound coming off the back side of the speaker, providing the cleanest, crispest bass sound. However, the sound volume is lower. Ported speakers are designed to allow that sound to escape, adding to the volume. However, the sound coming off the back of the speaker is degrees out of phase with that coming off the front of the speaker.
That can cause the sound waves to cancel each other out. However, the extra distance that the sound waves coming off the back of the speaker have to travel prevents that. Tuned ports are used on some speaker enclosures.
These ports are created to a specific size, so that they will cause the sound to reach the area in front of the speaker exactly one cycle later than the sound coming off the front of the speaker. While this still creates distortion, it is less than that caused by an unturned port.
Tweeters do not interact with their cabinets at all, and at times are used without a cabinet. While the construction is similar to a standard electromagnetic speaker, they usually use a dome-shaped diaphragm in place of a speaker cone.
Each material type produces its own unique sound characteristics. To help this, many are attached to a horn. As previously mentioned, some speaker systems use three or more speakers. In those cases, midrange speakers are attached to each of the band-filters.
A midrange speaker is essentially the same in appearance as a full-range speaker or woofer. The major difference is that s midrange speaker will not be as big as a woofer, but only about 5 to 8 inches in diameter. Woofers and other larger speakers can dissipate larger amounts of heat and have a larger voice coil wiring gauge. With some exceptions, power ratings like 15W watts RMS and above are realistic. Tweeters must match the rated impedance expected from an amplifier.
Amplifiers can overheat if used with speakers that are too low for their design. For example: using 4 ohm tweeters with a stereo rated at 8 ohms minimum is not acceptable. Just like other types of speakers, tweeters have an efficiency rating. This tells you how much volume, in decibels dB a tweeter produces for a specific amount of power.
In the case of speakers, higher efficiency is better. For average tweeters, you might expect to find this at between 89dB to 91dB at 1W. However, there are 2 types of tests for this and can be confusing.
The reason for this is that 8 ohm tweeters need a higher voltage applied to create 1W of power as opposed to a 4 ohm model. Similarly, matching tweeters to woofers requires similar care when shopping. Examples of some of the most common types of tweeters today. A soft dome tweeter left is often made with textiles or silk materials as shown.
A metal dome tweeter right is typically made from aluminum, titanium, or some hybrid design. Some listeners prefer one over the other, although a well-designed tweeter of one type may be able to outperform the other. Silk and textile are some of the most common materials used. Titanium and other types of metals like aluminum are also fairly common for mid-to-upper price range tweeters as well. A silk dome tweeter is one of the most popular types and often a good compromise between cost, performance, and sound quality.
A great example is this pair of Polk Audio DB car tweeters. Other special materials like ceramic and even diamond are used in others too. You need to always check the specifications such as the frequency response chart if provided. Mylar and PEI types use plastics for the dome. You can often hear the difference when comparing them directly against a silk dome tweeter pair. Some models are hybrid and use a type of metal coating that may or may not offer better performance.
A horn tweeter left can driven by a magnet assembly or piezo driver. Both are often used for outdoor music events and gatherings.
Horn tweeters are a special class of speakers. Their volume is often much higher than standard tweeters 96dB vs. Unlike models that use a magnet, a piezo tweeter uses a piezoelectric crystal coupled to a mechanical diaphragm like a digital watch or electronic clock uses for sound.
Measure content performance. Develop and improve products. List of Partners vendors. Robert Silva. Robert Silva has extensive experience in consumer electronics and home theater product sales and sales supervision; he has written about audio, video, and home theater topics since Robert has articles published on HBO.
Facebook Twitter LinkedIn. Updated on July 03, Tweet Share Email. In This Article. What Is a Loudspeaker? Mid-Range Speakers. Passive Radiators and Ports. The Bottom Line. Where should you put a subwoofer speaker? How do I connect my subwoofer to my computer's speakers?
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The 8 Best Affordable Bookshelf Speakers of The 5 Best Center Channel Speakers of Your Privacy Rights. To change or withdraw your consent choices for Lifewire. They use drivers to help translate electrical signals into physical vibrations so that you can hear recorded sounds. A tweeter is the type of speaker driver that produces the highest range frequency. The other two main drivers are woofers and midrange. Basically, a driver moves a flexible cone, or diaphragm, back and forth very quickly to produce sound waves.
The diaphragm is normally made of paper, plastic or metal and it's attached to the suspension's wide end. The suspension, also called the surround, is a flexible metal rim that lets the cone move. It's connected to the basket, which is the driver's metal frame. On the narrow end of the cone is a voice coil, which hooks up to the basket via a flexible metal ring that lets the coil move back and forth while still keeping it in place.
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