A speaker enclosure using a passive radiator (PR) usually contains an active loudspeaker (or main driver). And a passive radiator (also known as a “drone cone”). The active loudspeaker is a normal driver. And the passive is typically the same or similar. But without a voice coil and magnet assembly. It is only a suspended cone, not attached to a voice coil or wired to an electrical circuit. The passive radiator is not connected to the power amplifier.
A passive radiator system makes it easier for the speaker system to create the deepest pitches (e.g., basslines). These deep pitches are hard for the woofer to produce. With a PR system, the movement of the drone cone passive radiators reduces the amount that the woofer has to move. If a woofer has to move too much to produce very deep pitches, it can damage the woofer (this is called “over-extension”). A passive radiator system can provide an improved bass sound. Another benefit is that, given that PR designers usually use a larger drone cone than the real woofer (or use two drone cones). This means speaker designers can use a woofer that is not as large and achieve the same or better frequency response as in a bigger woofer.
The passive radiator usually has some means to adjust its mass (e.g., by adding weight to the cone), thereby allowing the speaker designer to change the speaker enclosure tuning. Internal air pressure produced by movements of the active driver cone moves the passive radiator cone as well.
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Stereophonic audio or, additionally, stereo, is a way of sound duplication that creates an illusion of multi-directional audible point of view. Normally, this is attained by using several independent sound programs through a construction of several loudspeakers (or stereo system headphones) so concerning create the impression of reasonable been told from various guidelines, as with natural ability to hear. Thus the word “stereophonic” pertains to so-called “quadraphonic” and “surround-sound” systems as well as the more prevalent two-channel, two-speaker systems. It is contrasted with monophonic, or “mono” acoustics, where audio tracks is noticed as via one position, often in advance in the audio field (analogous to a aesthetic field). Inside the 2000s, stereo audio is common in entertainment systems such as broadcast radio and Television, documented music and the theatre.
The term stereophonic derives from the Greek “???????” (stereos), “firm, stable” + “????” (ph?n?), “sound, shade, speech” and it was coined in 1927 by American Electric, by analogy with the term “stereoscopic”.
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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 drivers are physically separated so the tweeter, which is very directional, can be placed in an optimal position, usually on the dash facing the listener, while the larger mid-bass driver can be placed where there is room, often in the lower front of the car doors. Component speaker pairs are offered by all of the high-end audio manufacturers.
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SQ Quadraphonic (“Stereo system Quadraphonic”) was a matrix 4-route quadraphonic audio system for vinyl LP data. It was created by CBS Documents (known in america and Canada as Columbia Information) in 1971. Record companies who implemented this format include: Angel, CTI, Columbia (in European countries called CBS Data), EMI, Epic, Eurodisc, Harvest, HMV, Seraphim, Supraphon and Vanguard.
With Matrix forms, the four audio channels (ahead left, onward right, back remaining, back again right) are turned (encoded) right down to two stations (departed, right). They are then approved through a two-channel transmitting medium (usually an LP record) before being decoded back again to four stations and shown to four speaker systems.
The SQ encoding is dependant on the task by Peter Scheiber and additional produced by Benjamin Bauer. His basic method used 90 level phase move circuitry to permit increased 4-2-4 matrix systems to be developed. This 4:2:4 process cannot be completed without some information reduction. In other words, the four programs produced at the ultimate stage weren’t truly equivalent to people that have that your process had started.
In 4-2-4 matrix four route stereo, the trunk audio speakers should be of the same or almost same size quality and also have the same or almost same consistency range as leading speakers.
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Vehicle audio is equipment installed in a car or other vehicle to provide in-car entertainment and information for the vehicle occupants. Until the 1950s it consisted of a simple AM radio. Additions since then have included FM radio (1952), CD players (1984), navigation systems, Bluetooth telephone integration, and smartphone controllers like CarPlay and Android Auto. Once controlled from the dashboard with a few buttons, they can now be controlled by steering wheel controls and voice commands.
Initially implemented for listening to music and radio, vehicle audio is now part of car telematics, telecommunication, in-vehicle security, handsfree calling, navigation, and remote diagnostics systems. It is also used to create fake engine noise. For the 2015 Ford Mustang EcoBoost, an “Active Noise Control” system was developed that amplifies the engine sound through the car speakers. A similar system is used in the F-150 pickup truck. Volkswagen uses a Soundaktor, a special speaker to play sounds in cars such as the Golf GTi and Beetle Turbo. BMW plays a recorded sample of its motors through the car speakers, using a different samples according to the engine’s load and power.
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