Related Directory Categories
- Coaxial Cable (24)
Sources
Help build the largest human-edited directory on the web.
Submit a site - Become an editor
Wikipedia. Licensed under the GNU Free Documentation License.
Are you an expert in this subject? Join the discussion and share your knowledge at Wikipedia.org.
Coaxial
From Wikipedia, the free encyclopedia
In geometry, coaxial means that two or more forms which share a common axis; it is the three-dimensional linear analog of "concentric".
Coaxial cable, as a common example, has a wire conductor in the center (D) a circumferential outer conductor (B) and an insulator (C) separating these two conductors. The outer conductor is usually sheathed in a protective outer jacket (A).
The dimension and material of the conductors and insulation determine the cables characteristic impedance and attenuation at various frequencies.
In loudspeaker design, coaxial refers to a loudspeaker system in which the individual driver units radiate sound from the same point or axis. This is achieved by placing the high-frequency unit in the centre of the low-frequency driver, rather than having the two radiating from separate spaces. Altec Lansing pioneered the design with their 601 and 604 "duplex" (Altec's term for "coaxial") drivers in the 1940's and Tannoy further popularized the idea with their "dual-concentric" design several years later. The concept has been used by a number of other loudspeaker companies such as KEF, Technics, Thiel, and Geithain, but it still remains a minority exercise due to technical and budgetary considerations despite its theoretical advantages.