Mid-range speaker


Mid-range speaker
A midrange speaker

A loudspeaker driver that produces the frequency range from approximately 300–5000 hertz is known as a mid-range.

Midrange drivers are usually cone types or, less commonly, dome types, or compression horn drivers. The radiating diaphragm of a cone midrange unit is a truncated cone, with a voice coil attached at the neck, along with the spider portion of the suspension, and with the cone surround at the wide end. Cone midranges typically resemble small woofers. The most common material used for midrange cones is paper, occasionally impregnated and/or surface-treated with polymers or resins in order to improve vibrational damping. Other midrange cone materials include plastics such as polypropylene Cobex, or Bextrene, woven Kevlar, fiberglass, carbon fiber, or light metal alloys based on aluminium, magnesium, titanium, or other alloys. The radiating surface of a dome midrange is typically a 90-degree section of a sphere, made from cloth, metal or plastic film, with its suspension and voice coil co-located at the outer edge of the dome. Most professional concert midrange drivers are compression drivers coupled to horns. A very few midranges are electrostatic drivers, planar magnetic drivers, or ribbon drivers.

A midrange driver is called upon to handle the most significant part of the audible sound spectrum, the region where the most fundamentals emitted by musical instruments and, most importantly, human voice, lie. This region contains most sounds which are the most familiar to the human ear, and where discrepancies from faithful reproduction are most easily observed. It is therefore paramount that a midrange driver of good quality be capable of low-distortion reproduction.

Most television sets and small radios have only a single midrange driver or two for stereo sound. Since, in the case of television the most important aspect is the talking, it works out well. Since the ear is most sensitive to the middle frequencies produced by a midrange the driver and amplifier can both be low power while still delivering what is perceived to be good sound both in terms of volume and quality.

Installation problems

Midrange drivers are usually used in three way multi driver speaker systems. There are therefore special considerations involved in the acoustic join between the midrange and both the low frequency (woofers) and the high frequency drivers (tweeters). The nature of the drivers on both sides of the midrange, and the midrange itself affect the selection of crossover frequency and slope. Nearly all crossovers are passive circuits, designed to match the characteristics of the drivers and their mounting, and are built of capacitors, inductors, and resistors. Active or 'electronic' crossovers are used in some high performance hi-fi speakers, and in professional sound reinforcement systems.

Placement of the midrange (and tweeter) drivers on the enclosure baffle significantly affects the output of the driver, and the material surrounding the midrange and tweeter drivers on the baffle can produce (or inhibit) reflections of energy from the baffle face, or other items, further influencing the output. Grilles, especially those with structural frames, can further modify the output of the entire speaker system. One of the terms used in design circles to describe some of these diffraction and reflection artifacts is the baffle step effect.

Some manufacturers mount midrange drivers in their own small enclosures, isolating them from the air pressure changes generated by the woofer. These enclosures, especially if they are very small, can increase the Qtc of the midrange driver/enclosure combination, degrading transient response, in exchange for increased output at the lower end of the midrange drivers range.

See also



Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Mid-range — For loudspeakers, see mid range speaker. In statistics, the mid range or mid extreme of a set of statistical data values is the arithmetic mean of the maximum and minimum values in a data set,[1] or: As such, it is a measure of central tendency.… …   Wikipedia

  • mid|range — «MIHD raynj», adjective, noun. –adjective. intermediate in price, quality, size, etc.: »a midrange DVD unit. –noun. 1. the sound frequencies in the middle part of the audible sound spectrum. 2. a speaker for reproducing these frequencies …   Useful english dictionary

  • mid-range — /ˈmɪd reɪndʒ/ (say mid raynj) adjective of or relating to a loud speaker designed to reproduce sounds in the middle of the audible frequency range …   Australian English dictionary

  • Mid-Atlantic states — Mid Atlantic Region Regional statistics Composition Delaware …   Wikipedia

  • Range Rover — Infobox Automobile name = Land Rover Range Rover manufacturer = Land Rover parent company = British Leyland 1970 1986 Rover Group 1986 1988 British Aerospace 1988 1994 BMW 1994 2000 Ford 2000 2008 Tata Motors 2008 production = 1970 present… …   Wikipedia

  • Component speaker — A component speaker is a car audio speaker matched for optimal sound quality. Typically a pair of tweeters and mid bass drivers are matched with a crossover to limit the frequency range each speaker must accurately reproduce. Component speakers… …   Wikipedia

  • Loudspeaker — For other uses, see Loudspeaker (disambiguation). An inexpensive, low fidelity 3½ inch speaker, typically found in small radios …   Wikipedia

  • Bowers & Wilkins — Type Private Industry Consumer electronics Founded 1966 Headquarters …   Wikipedia

  • Woofer — This article is about a loudspeaker driver. For individuals trained in remote first aid, see Wilderness First Responder. Woofer is the term commonly used for a loudspeaker driver designed to produce low frequency sounds, typically from around 40… …   Wikipedia

  • Subwoofer — A subwoofer is a woofer, or a complete loudspeaker dedicated to the reproduction of bass audio frequencies, from perhaps 150 Hz down as far as 20 Hz, or in rare cases lower. Also known as subs , these are used to augment the low frequency… …   Wikipedia


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.