The biggest problem for enthusiasts playing Hi-Fi is to determine the best position for the speaker in the room. The key to achieving the best sound is how to reduce the speaker's interaction with the room, thus optimizing the spectral balance, low-frequency sensation, sound field depth, mid-frequency domain definition and image. The correct way to position is to move the horn position a lot and then shift it slightly until the sound is smooth and smooth. Proper positioning allows the entire system to live, taking only a few hours. 1. The relationship between the speaker and the listener is the most important. An equal isosceles triangle or an isosceles triangle should be placed between the two speakers and the listener to hear a good sound field and image. 2. The distance between the horn and the rear wall affects the low frequency energy. The closer the speaker is to the wall and the corner, the more the bass. 3. When the speaker and listener are in different positions, the latter will hear different room resonances. The lower the resonance, the lower the frequency and the intermediate frequency will be. 4. The farther the speaker is pulled from the back wall, the deeper the sound field. 5. The height of the listening position has an effect on the spectrum balance. 6. Too-in the speaker axis inward affects spectral balance (especially high frequency energy), depth of field and image force. We analyze the following one by one: 1. The relationship between the speaker and the listener To get the best sound, the distance between the listening position (commonly known as "Emperor") and the horn should be larger than the distance between the two speakers. At this time, the image is more vivid and the depth of field is more proportional. As for the distance between the two speakers, there is a compromise. When the two speakers are too close, the sound field is too narrow. When the listening position is good, the middle sound image is the best, and at the same time there is a wide sound field. You can move the emperor forward and backward to audition. Most of them will find a position where the image is accurate. Some intermediately positioned recordings can be used as guidelines. The relationship between the horn and the emperor also involves room factors. You can move the horn closer to the seat or shift the seat closer to the horn for close-up listening, but you can also pull the horn very open and sit in the distance to listen, if you use the latter In this way, the negative effect of the room effect on the sound will be greater, because the reflected sound is much more, and the direct sound that can be heard is relatively reduced. The closer the seat is to the horn, the more direct sounds are heard, and the less reflected sound, which helps to reduce the negative effects of room effects on the sound. 2. The closer the speaker is to the wall, the more the bass The walls around the room have a great influence on the overall spectrum balance of the horn. When the horn is close to the wall, the bass energy is reflected back into the room through the wall. The frequency response of the horn is the difference between the anechoic chamber and the normal room. The bass of the latter is not only more, but also stretches lower, that is, the horn is close to any wall (floor, back wall, side wall). ) will strengthen the low-frequency energy, the closer to the corner of the wall, the more bass you hear. The relationship between the horn position and the wall also affects the peak point of the frequency. The proper position of the horn can not only make the frequency of the horn naturally extend, but also avoid the peak of the valley. If the position is not properly placed, the low frequency will be rendered. Many horn manufacturers emphasize that the product should be kept away from the back wall and side wall as much as possible. The more reflected sound of the side wall is harmful, the diffuser is installed on the side wall to prevent the excessive concentration of reflected sound energy and the reception of direct sound. interference. 3. Different speakers and listening positions will hear different resonance modes. Inter-resonance mode refers to the occurrence of low-frequency peaks in some frequency bands, or stand waves, that is, a certain bass band is extremely strong, so that the sound is rendered. The mode of standing wave depends on the size of the room and the position of the pronunciation point, as long as By placing the speaker and listener in the best position, the bass will be more rounded. Use the above method to start, play some music with a lot of bass, and then shift the speaker one by one until you hear the bass stretch smooth and mix with other frequency bands. When you hear the bass is the most sleek, you will find it. The clarity and analytical power of the sound have also improved. The best test signal for evaluating bass and midrange is MOST (Music Articulation Test Tone), which consists of a segment of signal. There is a silence between the signals. If you use a earphone or your ear close to the listener, there is sound and silence. The paragraphs are clear and unambiguous, but if some of the frequency bands are affected by the room, then some signals will become ambiguous, indicating that there is a problem with this frequency band, you can prescribe the right medicine. This MATT signal is on the Sterephile audition CD2 Or can be found in Denon's Audio Technical CD, and there are more detailed instructions in the CD manual. Generally speaking, the farther the speaker is from the back wall, the deeper the sound field is. It is difficult to create a deep sound field when the speaker is close to the back wall. Pulling the speaker out a few times, the sound field performance can be different, but unfortunately, many It is impossible for the living room to let you pull the horn very close to the listening area. If you must put the horn close to the back wall, you should make appropriate sound absorption on the wall. 5. Listening to height and spectrum balance The balance of most speakers will change with the listening height, but only the midrange and high notes will be changed. The ear should be at the same height as the tweeter or between the two units. The tweeter of the speaker will mostly be located 32 inches from the ground. 40 inches to match the listening height of the average person, if you sit on an office chair that can adjust the height, you can easily hear the difference. Listening to the high-impact sound effect depends on the different speakers. Some speakers have considerable tolerance, the distinction is not so obvious, and some have significant differences. You can hear different sounds when you stretch out. To achieve a good balance, please use a seat to keep your ears at the same level as the tweeter. 6. The axis of the horn is offset inward, commonly known as "intrusion" Relative to the speaker balance, the toe-in of the speaker is another way of positioning, see the picture above. However, it cannot be said that the offset depends on the speaker and the listening environment. Some speakers require a large offset, while others require a "flat pendulum". The speaker toe-in placement has many effects on the sound. Including medium and high sound intensity, image strength, space and impact. Most speakers hear the highest treble in the triangular listening position, so they will receive more high-pitched energy when the speaker is toe-in, thus avoiding the purchase of speakers that are biased towards excessive brilliance. Toe-in also affects the ratio of the direct and reflected sounds you hear. When the speaker is "in", the listener can hear more direct sounds. If you listen to the side wall of the room, the sound is strong. In" effectively reduces the reflected sound of the side wall. Similarly, toe-in can improve the image-forming power. Many speakers have better sound field performance in toe-in, and the audio image is more stereoscopic. The best toe-in angle is often a compromise. Toe-in is too long, the sound field is deep enough, but the treble is too much. When not toe-in, the treble is smooth, but the middle image is more blurred, and the sense of space is also When the speaker is flat, the sound field is wide, but the accuracy of the image may be sacrificed. After the toe-in, the sound field is narrowed, but the image is better. In short, the toe-in depends on how much the off-axis response and the on-axis response of the horn are different, depending on the room and personal taste. The only way is to constantly shift and repeat. Listen. It is very important that the toe-in angles of the two speakers are the same. The easiest way is to measure the distance from the back wall to the back of the horn, and measure the other side. Another way is to look at the toe-in angle of the horn from the emperor's position. You can determine the toe-in angle of the two horns by looking at the side of the horn. A prerequisite is that the two side walls must be symmetrical. in conclusion The horn placement is the best way to improve the sound. It doesn't cost you money. It also improves your ability to distinguish sound quality, and it can make ordinary effects even better, even if the equipment and speakers are the same. Before you spend money to upgrade your equipment or perform sound absorption projects, please make sure that you have used the speakers to make the most of the system's potential. After you find the best position for the horn, you need to add the nails. The four (or three) nails should bear the same weight, so that the horn can stand still, not shake left and right, and always level. . We can control the sound effect through the speaker position. Changing the distance of the speaker to the back wall or side wall can control the low frequency quality. Changing the position of the speaker and the listener can reduce the influence of the room resonance. Adjusting the listening height and the toe-in angle can improve. Balance, changing the toe-in angle can easily improve the image and space, while moving the horn away from the back wall can increase the depth of the sound field.
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Let us first list the six factors that affect the sound, and then study it one by one.
According to the actual experience, in order to obtain the best low-frequency response, the distance between the horn and the back wall should be one-third of the length of the room. If this is not feasible, try one-fifth of the length of the room. Each position can cause a standing wave to help the speaker to be combined with the room. If possible, the listening position is preferably two-thirds of the length of the room. This type of position is not suitable for electrostatic speakers.
How to optimize the sound quality of your audio system4. The distance between the horn and the back wall affects the sound field performance.
