Whether to use the pure-sound HI-FI amplifier has become a typical symbol or watershed for distinguishing between home theater AV enthusiasts and HI-FI enthusiasts. Compared with the pure sound system, the home theater system pays more attention to entertainment and popularity, which is more suitable for the mass consumer group. AV players always like the sensory stimulation of audio and video, and HI-FI enthusiasts mostly like to close their eyes and listen to their hearts. One is "noisy" and the other is "quiet". The two are distinctly latitude and longitude, and there are many types of wells that do not make river water. However, there are a large number of HI-FI enthusiasts who can't help but lively AV teasing and temptation, and have been deeply involved. But in the end, it was still "returning to the shore", and he turned to HI-FI pure audio fever without hesitation. Is this a "ready of the past" for you who are losing your mind? In fact, a dynamic HI-FI system is more than enough for the occasional home-grown American blockbuster addiction. Conversely, when you use a set of audio-visual equipment of the same or equivalent, or even higher price, to listen to the HI-FI effect, the real HI-FI enthusiasts are unwilling to accept the price of the AV equipment. of. This is also the reason why many enthusiasts "abandon the dark cast" and finally squat to the "Buddha".
From the appearance of the amplifier, it can be roughly seen whether the amplifier is used in the HI-FI system, or in the home theater AV system, and even the overall quality of the amplifier, that is, the so-called "fever" that enthusiasts are talking about. phase". Further, we can see the seriousness of the manufacturer in the design and production process. This principle can also be applied to the selection of HI-FI fever equipment such as CD players and speakers.
The amplifier is located between the program source and the speaker. Its function is to amplify the signal from the source to drive the speaker and control the entire sound system. Functionally subdivided, the amplifier can be divided into a preamplifier and a postamplifier. The role of the preamplifier is to voltage amplify small signals from different sources to drive the power amplifier at the back stage. At the same time, the preamplifier is also the control center of the entire sound system. Its control functions mainly include program source input selection, as well as volume, tone and channel balance control. The power amplifier is also called the post-amplifier. Its function is to power-amplify the excitation signal provided by the pre-amplifier to promote the sound wave generated by the speaker. It is the source power core of the whole sound system, and can be low with as little distortion as possible. The impedance of the speaker provides enough power, and whether it is well matched with the speaker, will greatly affect the performance of the speaker and the playback quality of the system.
According to the amplification components used in the HI-FI amplifier, the amplifier has two types of transistors and tubes (or amplifiers). Regardless of the type of amplifier, the output power is its main technical indicator. To discuss the output power, First, we must understand the relationship between the auditory characteristics of the human ear and the power. As the output power of the amplifier increases, the acoustic level of the human ear is also increased, and this increase is not a linear, but a logarithmic relationship. In addition, the sensitivity of the speaker and the characteristics of the sound environment also affect the output power of the amplifier. The room size and the power of the amplifier are: the larger the room volume, the farther the listening distance is, the greater the power required for listening. An ideal amplifier, the sound should be neutral, that is, the number does not have its own special tone, but faithfully reproduce the original face of the program source. It can be thought of as a wire that is signal-controlled and amplified by the signal. But in fact, like other equipment, amplifiers always have more or less their own unique sounds. Therefore, audio rentals believe that they must listen to their ears.
The six reactors in the 2011 Fukushima Daiichi Nuclear Power Plant catastrophe had been designed by General Electric. Their design had been criticised as far back as 1972.
In March 2011, The New York Times reported that, despite earning $14.2 billion in worldwide profits, including more than $5 billion from U.S. opera
The six reactors in the 2011 Fukushima Daiichi Nuclear Power Plant catastrophe had been designed by General Electric. Their design had been criticised as far back as 1972
In March 2011, The New York Times reported that, despite earning $14.2 billion in worldwide profits, including more than $5 billion from U.S. operations, General Electric did not owe taxes in 2010. General Electric had a tax refund of $3.2 billion. This same article also pointed out that GE has reduced its American workforce by one fifth since 2002. The Times also reported that General Electric had been engineering tax reductions starting with the fees paid on its 1892 New York State charter.
tions, General Electric did not owe taxes in 2010. General Electric had a tax refund of $3.2 billion. This same article also pointed out that GE has reduced its American workforce by one fifth since 2002. The Times also reported that General Electric had been engineering tax reductions starting with the fees paid on its 1892 New York State charter.General Electric,General Electric Water Pump,General Ac Electrical,General Electric Contactor
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