Four principles for buying audio equipment

　　choose big or small

　　The "size" here refers to the power of the amplifier, the size of the speaker, and the size of the listening space. Why should the output power of the amplifier be larger? Why is the volume of the speaker rather large? The larger the output power of the amplifier is, the less likely the dynamics of the sound is to be compressed. The less the dynamics are compressed, the more realistic the sound. Moreover, the larger the output of the amplifier, the wider the range of speakers that can be matched.

　　What are the advantages of choosing a larger speaker size? The low frequency band can naturally extend downward, the mid frequency band is relatively loose, and the high frequency band also reduces the chance of tight distortion. Z The popularity of small-volume speaker cabinets in the past decade is not a new discovery in acoustic physics, but a response to increasingly narrow living spaces and lower cabinet costs. Also because the volume of the box becomes smaller, the impedance curve becomes steeper and steeper, the speaker becomes more and more difficult to push, and the required power of the amplifier becomes larger and larger. Therefore, if space is not a problem, the volume of the speaker would rather be larger than smaller.

　　Some people say that high-power power stage means more expensive price and worse sound quality, so it is better to choose power stage like 300B tube machine, which has better sound quality. When it comes to sound quality alone, this statement cannot be challenged. However, when it comes to a composite score of all factors that affect sound, the benefit of higher output power is far more than just sound quality. Unless you are using a speaker with an efficiency of more than 96dB, and the impedance curve should be very smooth.

　　What is the difference between the size of the listening space? The larger the listening space, the less the sound waves are affected by the six surfaces (walls) in the room. In other words, the smaller the listening space, the more the sound waves are distorted by the wall. As far as our hearing is concerned, these distortions include turbidity in the low-frequency range, strong standing waves in the low-mid frequencies, excessive nasality in the mid-range, and excessive reflections in the high-frequency range. In order to improve these distortions, we had to add various sound-absorbing materials and various surface shapes to the space, which was a laborious and unpleasant aftermath.

　　Of course, larger spaces also face different problems; excessive reverberation, (if not properly absorbed), diluted sound density (not enough speaker power), and more difficult noise isolation. In addition, larger space in urban areas means higher home-buying budgets. But in any case, the realism of a larger space like a concert hall is always a dream that cannot be achieved by listening to music in a small space. Therefore, it is better to keep a larger space than to separate the space into a small one.

　　To be imposing or to be precise

　　If an audio aficionado has ever had the experience of listening to music in the front row of a good concert hall, he will definitely yearn for the acoustics at home to be like live. Even in a really good concert hall, even if you sit in the back row, the surging momentum of the orchestral climax will be unforgettable for a lifetime. Therefore, the surging momentum is definitely the favorite of audio fans, because it is the reproduction of the original sound of the concert hall, and it is a magnificent landscape.

　　However, it is only possible for a very small number of Tian Jiazi to enjoy the surging surging like being on the scene. Because, you must have a high-output power stage, a large-volume and high-energy speaker, a large listening space, and the ability to turn up the volume without fear of disturbing the neighbors. If you can have these four "big", the life of audio fans is nothing but the joy. At this point, what you care about is not the performance of small details, but the atmosphere like the scene.

　　Unfortunately, it is difficult for most people to have these four "big" at the same time. So when shopping for equipment, you have to take your fate and think in a direction that shows fine detail. In this case, the amplifier should be as large as possible, and the loudspeaker should be as large as possible. You can turn your "bigger" budget into a "quality" requirement. Think about it, in a small space, the distance between you and the speaker is very close. Although the beauty of the majestic large landscape is difficult to reproduce, the fine beauty of the sparrow, although it is small, must be pursued. At this point, fine tuning techniques are even more important.

　　Whether it is the pursuit of momentum or finesse, there is an important principle that cannot be forgotten, that is, the pyramid-style sound balance mentioned above. Many audio fans blindly pursue finesse, thinking that "fine" only the sound field of bones is right, because he "sees" the shape of the instrument. This makes the reproduction of sound thin and harsh, lacking in color and tasteless. Please note that it is correct that the sound field must have flesh, bones and blood. No matter how fine-grained detail reproduction you require, it’s only right that the entire soundstage is pyramid-balanced, rich and full of charm.

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