This type of diffraction usually works best with low-frequency sound waves, so many line array speaker systems can use a column of bass speakers. They can also help increase the acoustic amplification of sound in a large room. If you’re considering line array speakers for your event space, there are many advantages for larger venues, but also some drawbacks. All of the above passive speakers draw their power from an external amplifier.
Because of this and the low excursion capacity, full-range electrostatic speakers are naturally large and the bass is released at a frequency equivalent to a quarter wavelength of the panel’s narrowest dimension. To reduce the size of commercial products, they are sometimes used as a high-frequency controller in combination with a conventional dynamic controller that effectively handles bass frequencies. A simple combination are two simple sources separated by a distance and vibrating out of phase, a miniature sphere that expands while the other contracts.
A pair of stereo speakers in a music system need two amplification channels. A surround sound system needs five, seven or sometimes even nine power channels. Flat magnetic speakers are sometimes described as tapes, but they are not really tape speakers. The term flat is usually reserved for speakers with approximately rectangular flat surfaces that radiate bipolar (i.e. front and rear). Planar magnetic speakers consist of a flexible diaphragm with a voice coil pressed or mounted on it. The current flowing through the coil interacts with the magnetic field of the magnets carefully placed on both sides of the diaphragm, causing the membrane to vibrate more or less evenly and without many bends or wrinkles.
In a large cone, it is more difficult to make the diaphragm move quickly. Similarly, it would be too difficult to vibrate a small controller at a speed slow enough to create the low-frequency sounds produced by a woofer. Individual electrodynamic controllers deliver their best performance within a limited frequency range. Multiple drivers (e.g., subwoofers, woofers, mid-range drivers, and tweeters) are usually combined into a complete speaker system to provide performance beyond that limitation. The three most commonly used sound radiation systems are cone, dome and horn type controllers.
Each type of speaker has a different purpose and is useful for different applications. A mid-range speaker usually covers frequencies between 200 and 300 Hz and about 5 to 7 kHz. The main function of a mid-range speaker is to distribute sound, audio equipment rentals including dialogue and music. This makes it the most basic type of speaker with the widest frequency coverage. You would think that a 3-way speaker should always sound better and more accurate than a 2-way speaker, but that is not the case.