Mid-range speakers are devices that cover the middle part of the frequency spectrum. They cover the most important part of the audio spectrum, so they run from a range that goes from 500Hz to 4kHz. The human voice, as well as a wide variety of instruments, fall within this specific range. The reason for this is that the middle part of the frequency spectrum is quite perceptible and pleasant. In addition, the human ear is extremely sensitive to the mid-range frequency, so these devices can remain on low power while offering good sound quality and volume.
To Keep in Mind
Many devices, such as tweeters and woofers, include mid-range speakers. It’s essential for the reproduction of mid-range frequencies to be natural, uncolored, and detailed. It’s also important to avoid the sound to be excessively bright or dull. When the speaker’s mid-range output isn’t clear, both spoken dialogue and musical content turn unnatural or even become imperceptible to the human ear. Therefore, mid-range speakers are an essential element of home theatre audio systems.
The Physics of Mid-range Speakers
The nature of the drivers can affect the selection of both crossover frequency and slope. Almost all crossovers are passive circuits that mimic the peculiarities of the drivers and their configuration. Crossovers involve capacitors, inductors, and resistors. High-performance, hi-fi speakers, and professional sound reinforcement systems commonly have active crossovers or electronic crossovers.
Cone mid-range drivers are very similar to small woofers. Mid-range drivers can be classified as cone types, dome types, or compression horn drivers. The diaphragm of a cone mid-range driver involves a truncated cone with a voice coil. Most mid-range cones are of paper, and sometimes they involve polymers or resins to improve vibrational damping. Other materials include a variety of plastics, such as polypropylene, Codex, Bextrene, woven Kevlar, fiberglass, carbon fiber, or light metal mixtures based on aluminium, magnesium, or titanium. Cloth, metal, or plastic film are the most common materials for the surface of a dome mid-range. Dome mid-range devices are located at the outer edge of the dome.
Many professional concert mid-range drivers are compression drivers with horns, while some are electrostatic, planar magnetic, or ribbon drivers. Most small radios and television sets include a single mid-range driver. When you want a stereo sound for the human ear, you must involve two mid-range drivers. Both the driver and amp can work on low power, while still delivering a good sound both in terms of volume and quality. This is an essential element regarding both television and radio.