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Computer speakers, or multimedia speakers, are speakers sold for use with computers, although usually capable of other audio uses, e.g. for an MP3 player. Most such speakers have an internal amplifier and consequently require a power source, which may be by a mains power supply often via an AC adapter, batteries, or a USB port.
Audio stereo power amplifier made by McIntosh The internal view of a Mission Cyrus 1 Hi Fi integrated audio amplifier (1984) [1]. An audio power amplifier (or power amp) amplifies low-power electronic audio signals, such as the signal from a radio receiver or an electric guitar pickup, to a level that is high enough for driving loudspeakers or headphones.
The audio fidelity of this technique is further decreased by the lack of a properly sized dynamic loudspeaker, specially in modern machines and particularly laptops that use a tiny moving-iron speaker (often confused with piezoelectric). The reason for this is that PWM-produced audio requires a low-pass filter before the final output in order ...
NAD 3020 integrated amplifier. The NAD 3020 is a stereo integrated amplifier by NAD Electronics, considered to be one of the most important components in the history of high fidelity audio. [1] Launched in 1978, this highly affordable product delivered a good quality sound, which acquired a reputation as an audiophile amplifier of exceptional ...
Naim power amplifiers are given numbers according to their power output into nominal load of 4 ohms. The company's first amplifier, the NAP 160, is a two-channel power amplifier with an output of 60 watts per channel; the NAP 135, which is a one-channel amplifier based on the same design as the NAP 250 rated at 135 watts. A custom-built very ...
As a technology journalist with over 30 years covering consumer electronics, I have considerable experience in this area. And as a certified TV junkie who logs more hours on the couch than I care ...
Most of the power in voice-application audio systems is below 400 Hz, meaning that insertion loss at lower frequencies would be greater. The best transformers reduce mid-band frequencies by 0.5 dB (approximately 10% power loss) or less, resulting in a ten watt loudspeaker drawing 11.1 watts from the amplifier. [13]
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