About the tube amplifier
Nowadays, most people only need to wear headphones when listening to music. Those who are interested in music will buy a pair of better headphones. If they are more pursuing, they may get a power amplifier at home and drive it. speakers to enjoy music. As a non-music enthusiast, I accidentally learned today that there is a power amplifier called "tube amplifier".
Tube amplifiers were popular in the 1950s and 1960s, and of course today's enthusiasts. The reason why it is called tube amplifier is that the main audio amplification component of this kind of sound amplifier is an electronic tube, also called a vacuum tube. This tube can be described as "biliary" in Chinese. The English name of the tube amplifier is very straightforward, it is called Vacuum Tube Amplifier, and the literal translation is vacuum tube amplifier. The timbre has a gentle, thick, sweet and moving charm like a yellow rose, which is especially suitable for playing idyllic, soothing and elegant classical music and Chinese folk music. Later, due to the emergence of transistor power amplifiers, the power amplifiers using electronic tubes were gradually eliminated. We usually see crystal machine power amplifiers in audio stores, which is now called the power amplifier by default, also called stone machine. However, crystal amplifiers are not as good as electronic tubes in the performance of soft timbre in the eyes of golden ear enthusiasts, so there will be two groups of power amplifier enthusiasts, one is tube amplifiers, and the other is stone amplifiers. In addition to the difference in tone, the biggest problem with electronic tubes is that they are not small in size and consume electricity, while transistors can be made smaller and save electricity.
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合并式胆机还需要再加一个前级吗?很多烧友都有这样的疑问。这里有三个因素,一是音源输出的讯号是否大?很多外国CD机输出讯号偏小,加台前级可以放大讯号。二是音箱的灵敏度,灵敏度在90dB以下的音箱,加台前级,声音的表现会更好。三是胆机的放大量,增益30dB的标准合并式胆机,对输入讯号的放大量约15倍左右。而增益为20dB的合并式胆机,放大量约10倍,略显不足,动态会有欠缺。如果你对声音有很高的要求,最好再添一台前级做配套,将合并功放作为后级用。前级可以增10倍放大量,两台机加起来增益可达40dB。这时候,后级会推得更轻松、声音密度高、细节丰富、瞬态更强,音响系统的表现就非常完美了。
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