Some speaker systems use a woofer for lower frequencies, sometimes good enough that a subwoofer is not needed. In addition, some speakers use the woofer to handle mid frequencies, eliminating the mid-range driver. This can be achieved with the selection of a tweeter that can operate low enough that, when combined with a woofer that responds loud enough, the two drivers are added consistently at the mid frequencies. Speaker speakers are a very efficient design because the diaphragm doesn’t need to oscillate much to create a loud sound compared to, say, a cone membrane. Due to their high efficiency, speakers are still used in speakers for public speeches to broadcast announcements and warning signals.
Chassis are usually cast aluminum alloy, in heavier magnetic structure speakers; or stamped from thin sheet steel on lighter structure controllers. Other materials such as molded plastic and cushioned plastic composite baskets are becoming more common, especially for low-cost, low-mass conductors. A subwoofer is a speaker intended for playing the low-frequency tape of your audio, such as the rumbling bass sounds in your movies and the bass of audio equipment rentals your music. General speakers are not suitable for these low frequencies, so a special subwoofer is needed if you want to do justice to the entire audio spectrum. In their traditional form, speakers are usually found in pairs such as standing or shelf-like speakers, but surround sound speakers are also just a small variation on the classic speaker. They don’t have holes for air to “escape,” so air being pushed back is trapped inside the case.
Due to their large size, line arrays are usually hung from the ceiling near the stage/altar. Although it is a popular solution for high-performance music applications and large format concerts, line arrays are not suitable for all rooms. They tend to excel in rooms that are deep and not too wide and require a good ceiling height due to their vertical size. When analyzing the speakers and their technology, you will see a reference to different types of speakers for different frequency ranges.
This refers to the speaker driver or cone rather than the size of the device itself. Because many speakers have multiple drivers that handle specific parts of the frequency range, these components may be a different size. In general, a small speaker called a “tweeter” is used in the reproduction of high frequencies and will be a dome-shaped diaphragm of about 1″ in diameter. Since the invention of phonographs in 1877, much has changed when it comes to controller design. While horn speakers are quite rare outside of their use in public address systems, cone and dome speakers can be found in almost every home.
Such transducers can cover a wide range of frequencies and have been touted as close to an ideal point sound source. This unusual approach is followed by very few manufacturers, in very different schemes. Directivity is an important issue because it affects the frequency balance of the sound a listener hears, and also the interaction of the speaker system with the room and its contents. Speakers with very broad directivity, or that increases rapidly at high frequencies, can give the impression that there are too many highs or too few. This is part of the reason why measuring the frequency response to the axis is not a complete characterization of the sound of a particular speaker.
Enclosures with a passive radiator lie somewhere between the above two types. They have ports, but in these ports there are passive controllers (they do not have voice coils and are not connected to the amplifier). These passive controllers vibrate when sound waves are created by the active controllers. Passive bass radiators combine the advantages of sealed and bass reflex housings: speakers with passive bass radiators produce more accurate sound than bass reflex speakers and are more efficient than sealed speakers.
Sometimes the playback of the lower frequencies (20Hz-~50Hz) is supplemented with a so-called subwoofer often in the own cabinet. In a so-called powered speaker system, the power amplifier that actually drives the speaker drivers is integrated into the housing itself; these are becoming more common, especially as computer speakers. A full-range driver is a speaker designed to play only one audio channel without the help of other drivers and should therefore cover the entire audio frequency range. Full-range (or rather, wide range) drivers are most commonly heard on public address systems, on TVs (although some models are suitable for listening to high fidelity), small radios, intercoms, some computer speakers, etc.