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The Freespace 51 is an "in-ground" landscape speaker that features omnidirectional, 360-degree sound projection, as well as a bass port. The speakers are designed to blend in with outdoor landscaping, and the wiring features "Posi-Tap" connectors, so that speaker wiring can be hidden underground.
The company also produced a tilted speaker stand, the "Rectilinear Dispersion Base", intended to be used with the Model 5 speaker. [25] Although the Rectilinear speakers were distributed through a nationwide network of up to 400 dealers, most of their sales was generated on the East Coast. [26]
A horn loudspeaker is a loudspeaker or loudspeaker element which uses an acoustic horn to increase the overall efficiency of the driving element(s). A common form (right) consists of a compression driver which produces sound waves with a small metal diaphragm vibrated by an electromagnet, attached to a horn, a flaring duct to conduct the sound waves to the open air.
A compression driver (cylindrical box at rear) on a midrange horn speaker used in a home audio system A compression driver (A) in a horn loudspeaker consists of a metal diaphragm (blue) vibrated by the audio signal current in a coil of wire (red) between the poles of a cylindrical magnet (green) .
The 1925 paper [1] of Chester W. Rice and Edward W. Kellogg, fueled by advances in radio and electronics, increased interest in direct radiator loudspeakers. In 1930, A. J. Thuras of Bell Labs patented (US Patent No. 1869178) his "Sound Translating Device" (essentially a vented box) which was evidence of the interest in many types of enclosure design at the time.
The Magna Organ was an electric-fan driven free reed organ with the microphone sealed in a soundproof box, instead of the electrostatic pickups used on electrostatic reed organs. [ note 1 ] Early designs of the Magna Organ were a kind of additive-synthesizer that summed-up the partials generated by the frequency-multipliers .
These original models had a single built-in mono speaker by the keyboard. The Intel Pentium and Microsoft Windows stickers were affixed beside the top left corner of the screen. PCG-C1 - Mobile Pentium MMX 233MHz CPU, 3.2GB hard drive, 64MB RAM, ultra-wide 8.9" 1024x480 TFT display, 0.27MP webcam, integrated modem, Windows 98 (September 1998 ...
The left and right surround speakers in the bottom line create the surround sound effect. 5.1 surround sound ("five-point one") is the common name for surround sound audio systems. 5.1 is the most commonly used layout in home theatres. [1] It uses five full-bandwidth channels and one low-frequency effects channel (the "point one"). [2]