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More commonly, commercial systems are employed to accomplish these tasks. Some systems distribute digital audio over Cat5 cable to amplifiers installed in each zone. Others have all equipment centralized and distribute speaker-level audio from the "headend" equipment location. Manufacturers of such equipment include NuVo and Zon.
High-voltage audio amplifiers have almost become a one chip solution. For example, National Semiconductor 's LME49810 [ 7 ] (and similar products LME49811 [ 8 ] and LME49830 [ 9 ] ) can output 100 V peak to peak signals, but have relatively low current output, so a standard circuit includes a Darlington or FET discrete output stage.
The first 2.1 audio system from Bose was the "Lifestyle 10", which was released in 1990. The Lifestyle 10 included a single-disk CD player, an AM/FM radio and "Zone 2" RCA outputs which could be configured to output a different source to the primary speakers. A 6-disk magazine-style CD changer was introduced in 1996.
The Play:5 is the current luxury model of the Play line of products, with the first generation having two tweeters and drivers plus a subwoofer, with 5 Class-D amplifiers. [12] [13] However, the second generation has three tweeters and mid-woofers, with 6 Class-D amplifiers, in a phased array. [14] Like its brother products, it also has an ...
Bi-amping - An active crossover with two amplifiers.. Bi-amping and tri-amping is the practice of using two or three audio amplifiers respectively to amplify different audio frequency ranges, with the amplified signals being routed to different speaker drivers, such as woofers, subwoofers and tweeters.
Audio engineers select amplifiers that provide enough headroom. Headroom refers to the amount by which the signal-handling capabilities of an audio system exceed a designated nominal level . [ 11 ] Headroom can be thought of as a safety zone allowing transient audio peaks to exceed the nominal level without damaging the system or the audio ...