Let's take the French Jinlang 907Be bookshelf as an example:
1, withstand power: 90W
Frequency response: 50-37KHZ-3dB
3. Weighing impedance: 8 Euro
4, sensitivity: 89dB
5, net weight: 12kg
6, volume: H × W × D 420 × 231 × 348
1 Withstand power of 90W, the nonlinear distortion of the box does not exceed the specified value (generally 1-5%), and the average power that can be continuously fed, also called the rated power, is a dynamic indicator. In actual use, try not to work longer than 90W for a long time, but short-term is allowed and inevitable, because the audio signal contains a lot of quenching signals. In particular, some CD audition discs are extremely dynamic and often exceed N times the normal signal. There are quite a few buddies who try to test the low frequency. They often turn the volume of the amplifier to close to or beyond the 12 o'clock position, often causing the bottoming, the edge shooting phenomenon, and even burning the horn. Pay special attention, especially for the imported bookshelf, they are generally overloaded. The ability is not very strong. (Mainly for commercial reasons, the greater the power, the higher the price). The relative domestic production is better. Due to the long-term continuation of the planned economy and the more honest attitude of the Chinese people, the remaining power margin is larger. Such as "Fei Le ... South Whale, etc.". But don't be afraid, the speakers must be used, not to see, there is no problem with 2 times the rated power in a short time, up to 4 times (very short time).
Generally, you can enjoy the music volume control at 3-10W. What is the concept of 10W? You can use the multimeter to measure the red and black end of the amplifier output, and the AC swing to 9-10V (when 8 Euro speakers), the output at that time. The power is about 10W. The calculation method is: the square of the alternating voltage (V) divided by the impedance of the speaker (Europe) equals the power (W). At this time, the loudness can already feel the shock of the low frequency.
2 Frequency response: (50-37KH2-3dB) Also known as the effective frequency range, it means to give the speaker a constant signal. The characteristic curve of the sound pressure radiated from low frequency to high frequency varies with frequency. The International Electrotechnical Commission (IEC) stipulates that the average sound pressure level is reduced by 10 dB as the effective frequency range of the speaker. It seems that this standard is too low now. The manufacturer's standard is much higher than this standard.
If the speaker frequency response does not indicate how much dB, then the frequency response indicator is meaningless. The strength of the wave is clearly -3dB, reflecting that the box has an extremely flat frequency response curve, which is a single indicator. Words, its playback sound quality must be good. On the contrary, some imported boxes can also be standard -6dB, low-end goods standard -10dB, and some simply do not deliberately add to the impression. The frequency response marked by the same speaker will be different depending on the decibel value.
Such as the power box: 50-37KHZ-3dB
Can also be labeled: 45-40KHZ-6dB
Even worse: 38-42KHZ-10dB
Simply not marked: 32-37KHZ
Therefore, look at the frequency response indicator, we must pay attention to the decibel value, only have a reference meaning (the front 50HZ number represents the lower the bass frequency, the better, the back 37KHZ represents the high frequency, the higher the better. This style 907Be speaker, the standard is rigorous, The indicators are quite high and the performance is definitely good.
3 Impedance 8 ohms, the actual impedance of the speaker is characterized by frequency variation, called the speaker impedance characteristic, which is the maximum at the low frequency resonance frequency f0. When the resonant frequency f0 is gradually increased, the impedance will appear at a minimum. The impedance at this time is called the rated impedance. This sentence may not be easy to understand. It is said that the common point is when the low frequency resonant frequency rises at the corner. Impedance is the rated impedance. It is generally 1.05-1.1 times of the voice coil DC impedance, such as 8 euro rated impedance, the measured voice coil DC resistance is around 7.2. The impedance of the ohm does not affect the sound quality, but is used as a reference value when the power amplifier is placed. The average household speaker is between 4-16 Euros. It is better to choose 8 Euros, especially for the Central Speaker. It is easy to match some when upgrading the main box in the future, because AV power amplification does not recommend you use speakers below 4 Euro.
4 Sensitivity: 89dB, which is a quantitative indicator indicating the efficiency of the speaker's electrical conversion, usually expressed in decibels. The characteristic sensitivity is the sound pressure level (measured in the muffler chamber) measured at the speaker axis IM when the IW pink noise electric power is input to the speaker.
The level of sensitivity index has a certain significance for the optional power amplifier. Because of the customary definition in the industry: each phase is 3dB, the loudness is also doubled, which means that when the speaker is fed the same power, such as 90dB speaker, it is twice as loud as the 87dB speaker. And so on, 93dB is 2 times larger...
Most of the common household speakers on the market are between 84-94dB. I divide them into three levels: 1 low sensitivity, 84-86dB
1 sensitivity, 87-89dB
1 high sensitivity, above 90dB
When choosing a speaker, try to use medium, high-sensitivity (87dB or more), especially playing AV. Generally, the output power of AV power amplifier is limited. On the contrary, it must be equipped with a high-power AV amplifier, otherwise it will promote low-sensitivity speaker pairs (such as Dynaudio, AAD, etc.), in order to achieve some sound effects, you have to artificially increase the output of the AV amplifier, which is unfavorable to the power amplifier. Of course, if you really play Hi-Fi, it is another matter.
5 net weight 12kg, well understand, the general speaker is the heavier the better, the box body is good to eliminate the resonance phenomenon, the international standard weight unit is kg, which is commonly used in China.
6 volumes, generally in millimeters or centimeters, internationally, in inches, 1 inch = 2.54 cm, you can convert it. H stands for height, W stands for width, and D stands for depth.
7 other speakers also have an important distortion indicator, the general manufacturers are not willing to mark. Distortion includes harmonic distortion, intermodulation distortion, phase distortion, etc. Commonly used percentages indicate the degree of distortion. The distortion of the speaker is generally 2-5%, and the model with better imported brand name can be controlled at about 1%. The reason why manufacturers do not want to mark it is compared with other audio equipment, such as power amplifier, CD player, etc., the distortion is in From a few tenths to a few hundred thousandths, the only speakers are too shameful. Why do we often say that the speaker is the most vulnerable part of the audio equipment, mainly refers to its distortion. In the process of electroacoustic conversion, it is difficult to eliminate some mechanical, geometric, electromagnetic, etc.
Let's take the French Jinlang 907Be bookshelf as an example:
1, withstand power: 90W
Frequency response: 50-37KHZ-3dB
3. Weighing impedance: 8 Euro
4, sensitivity: 89dB
5, net weight: 12kg
6, volume: H × W × D 420 × 231 × 348
1 Withstand power of 90W, the nonlinear distortion of the box does not exceed the specified value (generally 1-5%), and the average power that can be continuously fed, also called the rated power, is a dynamic indicator. In actual use, try not to work longer than 90W for a long time, but short-term is allowed and inevitable, because the audio signal contains a lot of quenching signals. In particular, some CD audition discs are extremely dynamic and often exceed N times the normal signal. There are quite a few buddies who try to test the low frequency. They often turn the volume of the amplifier to close to or beyond the 12 o'clock position, often causing the bottoming, the edge shooting phenomenon, and even burning the horn. Pay special attention, especially for the imported bookshelf, they are generally overloaded. The ability is not very strong. (Mainly for commercial reasons, the greater the power, the higher the price). The relative domestic production is better. Due to the long-term continuation of the planned economy and the more honest attitude of the Chinese people, the remaining power margin is larger. Such as "Fei Le ... South Whale, etc.". But don't be afraid, the speakers must be used, not to see, there is no problem with 2 times the rated power in a short time, up to 4 times (very short time).
Generally, you can enjoy the music volume control at 3-10W. What is the concept of 10W? You can use the multimeter to measure the red and black end of the amplifier output, and the AC swing to 9-10V (when 8 Euro speakers), the output at that time. The power is about 10W. The calculation method is: the square of the alternating voltage (V) divided by the impedance of the speaker (Europe) equals the power (W). At this time, the loudness can already feel the shock of the low frequency.
2 Frequency response: (50-37KH2-3dB) Also known as the effective frequency range, it means to give the speaker a constant signal. The characteristic curve of the sound pressure radiated from low frequency to high frequency varies with frequency. The International Electrotechnical Commission (IEC) stipulates that the average sound pressure level is reduced by 10 dB as the effective frequency range of the speaker. It seems that this standard is too low now. The manufacturer's standard is much higher than this standard.
If the speaker frequency response does not indicate how much dB, then the frequency response indicator is meaningless. The strength of the wave is clearly -3dB, reflecting that the box has an extremely flat frequency response curve, which is a single indicator. Words, its playback sound quality must be good. On the contrary, some imported boxes can also be standard -6dB, low-end goods standard -10dB, and some simply do not deliberately add to the impression. The frequency response marked by the same speaker will be different depending on the decibel value.
Such as the power box: 50-37KHZ-3dB
Can also be labeled: 45-40KHZ-6dB
Even worse: 38-42KHZ-10dB
Simply not marked: 32-37KHZ
Therefore, look at the frequency response indicator, we must pay attention to the decibel value, only have a reference meaning (the front 50HZ number represents the lower the bass frequency, the better, the back 37KHZ represents the high frequency, the higher the better. This style 907Be speaker, the standard is rigorous, The indicators are quite high and the performance is definitely good.
3 Impedance 8 ohms, the actual impedance of the speaker is characterized by frequency variation, called the speaker impedance characteristic, which is the maximum at the low frequency resonance frequency f0. When the resonant frequency f0 is gradually increased, the impedance will appear at a minimum. The impedance at this time is called the rated impedance. This sentence may not be easy to understand. It is said that the common point is when the low frequency resonant frequency rises at the corner. Impedance is the rated impedance. It is generally 1.05-1.1 times of the voice coil DC impedance, such as 8 euro rated impedance, the measured voice coil DC resistance is around 7.2. The impedance of the ohm does not affect the sound quality, but is used as a reference value when the power amplifier is placed. The average household speaker is between 4-16 Euros. It is better to choose 8 Euros, especially for the Central Speaker. It is easy to match some when upgrading the main box in the future, because AV power amplification does not recommend you use speakers below 4 Euro.
4 Sensitivity: 89dB, which is a quantitative indicator indicating the efficiency of the speaker's electrical conversion, usually expressed in decibels. The characteristic sensitivity is the sound pressure level (measured in the muffler chamber) measured at the speaker axis IM when the IW pink noise electric power is input to the speaker.
The level of sensitivity index has a certain significance for the optional power amplifier. Because of the customary definition in the industry: each phase is 3dB, the loudness is also doubled, which means that when the speaker is fed the same power, such as 90dB speaker, it is twice as loud as the 87dB speaker. And so on, 93dB is 2 times larger...
Most of the common household speakers on the market are between 84-94dB. I divide them into three levels: 1 low sensitivity, 84-86dB
1 sensitivity, 87-89dB
1 high sensitivity, above 90dB
When choosing a speaker, try to use medium, high-sensitivity (87dB or more), especially playing AV. Generally, the output power of AV power amplifier is limited. On the contrary, it must be equipped with a high-power AV amplifier, otherwise it will promote low-sensitivity speaker pairs (such as Dynaudio, AAD, etc.), in order to achieve some sound effects, you have to artificially increase the output of the AV amplifier, which is unfavorable to the power amplifier. Of course, if you really play Hi-Fi, it is another matter.
5 net weight 12kg, well understand, the general speaker is the heavier the better, the box body is good to eliminate the resonance phenomenon, the international standard weight unit is kg, which is commonly used in China.
6 volumes, generally in millimeters or centimeters, internationally, in inches, 1 inch = 2.54 cm, you can convert it. H stands for height, W stands for width, and D stands for depth.
7 other speakers also have an important distortion indicator, the general manufacturers are not willing to mark. Distortion includes harmonic distortion, intermodulation distortion, phase distortion, etc. Commonly used percentages indicate the degree of distortion. The distortion of the speaker is generally 2-5%, and the model with better imported brand name can be controlled at about 1%. The reason why manufacturers do not want to mark it is compared with other audio equipment, such as power amplifier, CD player, etc., the distortion is in From a few tenths to a few hundred thousandths, the only speakers are too shameful. Why do we often say that the speaker is the most vulnerable part of the audio equipment, mainly refers to its distortion. In the process of electroacoustic conversion, it is difficult to eliminate some mechanical, geometric, electromagnetic, etc.
Let's take the French Jinlang 907Be bookshelf as an example:
1, withstand power: 90W
Frequency response: 50-37KHZ-3dB
3. Weighing impedance: 8 Euro
4, sensitivity: 89dB
5, net weight: 12kg
6, volume: H × W × D 420 × 231 × 348
1 Withstand power of 90W, the nonlinear distortion of the box does not exceed the specified value (generally 1-5%), and the average power that can be continuously fed, also called the rated power, is a dynamic indicator. In actual use, try not to work longer than 90W for a long time, but short-term is allowed and inevitable, because the audio signal contains a lot of quenching signals. In particular, some CD audition discs are extremely dynamic and often exceed N times the normal signal. There are quite a few buddies who try to test the low frequency. They often turn the volume of the amplifier to close to or beyond the 12 o'clock position, often causing the bottoming, the edge shooting phenomenon, and even burning the horn. Pay special attention, especially for the imported bookshelf, they are generally overloaded. The ability is not very strong. (Mainly for commercial reasons, the greater the power, the higher the price). The relative domestic production is better. Due to the long-term continuation of the planned economy and the more honest attitude of the Chinese people, the remaining power margin is larger. Such as "Fei Le ... South Whale, etc.". But don't be afraid, the speakers must be used, not to see, there is no problem with 2 times the rated power in a short time, up to 4 times (very short time).
Generally, you can enjoy the music volume control at 3-10W. What is the concept of 10W? You can use the multimeter to measure the red and black end of the amplifier output, and the AC swing to 9-10V (when 8 Euro speakers), the output at that time. The power is about 10W. The calculation method is: the square of the alternating voltage (V) divided by the impedance of the speaker (Europe) equals the power (W). At this time, the loudness can already feel the shock of the low frequency.
2 Frequency response: (50-37KH2-3dB) Also known as the effective frequency range, it means to give the speaker a constant signal. The characteristic curve of the sound pressure radiated from low frequency to high frequency varies with frequency. The International Electrotechnical Commission (IEC) stipulates that the average sound pressure level is reduced by 10 dB as the effective frequency range of the speaker. It seems that this standard is too low now. The manufacturer's standard is much higher than this standard.
If the speaker frequency response does not indicate how much dB, then the frequency response indicator is meaningless. The strength of the wave is clearly -3dB, reflecting that the box has an extremely flat frequency response curve, which is a single indicator. Words, its playback sound quality must be good. On the contrary, some imported boxes can also be standard -6dB, low-end goods standard -10dB, and some simply do not deliberately add to the impression. The frequency response marked by the same speaker will be different depending on the decibel value.
Such as the power box: 50-37KHZ-3dB
Can also be labeled: 45-40KHZ-6dB
Even worse: 38-42KHZ-10dB
Simply not marked: 32-37KHZ
Therefore, look at the frequency response indicator, we must pay attention to the decibel value, only have a reference meaning (the front 50HZ number represents the lower the bass frequency, the better, the back 37KHZ represents the high frequency, the higher the better. This style 907Be speaker, the standard is rigorous, The indicators are quite high and the performance is definitely good.
3 Impedance 8 ohms, the actual impedance of the speaker is characterized by frequency variation, called the speaker impedance characteristic, which is the maximum at the low frequency resonance frequency f0. When the resonant frequency f0 is gradually increased, the impedance will appear at a minimum. The impedance at this time is called the rated impedance. This sentence may not be easy to understand. It is said that the common point is when the low frequency resonant frequency rises at the corner. Impedance is the rated impedance. It is generally 1.05-1.1 times of the voice coil DC impedance, such as 8 euro rated impedance, the measured voice coil DC resistance is around 7.2. The impedance of the ohm does not affect the sound quality, but is used as a reference value when the power amplifier is placed. The average household speaker is between 4-16 Euros. It is better to choose 8 Euros, especially for the Central Speaker. It is easy to match some when upgrading the main box in the future, because AV power amplification does not recommend you use speakers below 4 Euro.
4 Sensitivity: 89dB, which is a quantitative indicator indicating the efficiency of the speaker's electrical conversion, usually expressed in decibels. The characteristic sensitivity is the sound pressure level (measured in the muffler chamber) measured at the speaker axis IM when the IW pink noise electric power is input to the speaker.
The level of sensitivity index has a certain significance for the optional power amplifier. Because of the customary definition in the industry: each phase is 3dB, the loudness is also doubled, which means that when the speaker is fed the same power, such as 90dB speaker, it is twice as loud as the 87dB speaker. And so on, 93dB is 2 times larger...
Most of the common household speakers on the market are between 84-94dB. I divide them into three levels: 1 low sensitivity, 84-86dB
1 sensitivity, 87-89dB
1 high sensitivity, above 90dB
When choosing a speaker, try to use medium, high-sensitivity (87dB or more), especially playing AV. Generally, the output power of AV power amplifier is limited. On the contrary, it must be equipped with a high-power AV amplifier, otherwise it will promote low-sensitivity speaker pairs (such as Dynaudio, AAD, etc.), in order to achieve some sound effects, you have to artificially increase the output of the AV amplifier, which is unfavorable to the power amplifier. Of course, if you really play Hi-Fi, it is another matter.
5 net weight 12kg, well understand, the general speaker is the heavier the better, the box body is good to eliminate the resonance phenomenon, the international standard weight unit is kg, which is commonly used in China.
6 volumes, generally in millimeters or centimeters, internationally, in inches, 1 inch = 2.54 cm, you can convert it. H stands for height, W stands for width, and D stands for depth.
7 other speakers also have an important distortion indicator, the general manufacturers are not willing to mark. Distortion includes harmonic distortion, intermodulation distortion, phase distortion, etc. Commonly used percentages indicate the degree of distortion. The distortion of the speaker is generally 2-5%, and the model with better imported brand name can be controlled at about 1%. The reason why manufacturers do not want to mark it is compared with other audio equipment, such as power amplifier, CD player, etc., the distortion is in From a few tenths to a few hundred thousandths, the only speakers are too shameful. Why do we often say that the speaker is the most vulnerable part of the audio equipment, mainly refers to its distortion. In the process of electroacoustic conversion, it is difficult to eliminate some mechanical, geometric, electromagnetic, etc.
1, withstand power: 90W
Frequency response: 50-37KHZ-3dB
3. Weighing impedance: 8 Euro
4, sensitivity: 89dB
5, net weight: 12kg
6, volume: H × W × D 420 × 231 × 348
1 Withstand power of 90W, the nonlinear distortion of the box does not exceed the specified value (generally 1-5%), and the average power that can be continuously fed, also called the rated power, is a dynamic indicator. In actual use, try not to work longer than 90W for a long time, but short-term is allowed and inevitable, because the audio signal contains a lot of quenching signals. In particular, some CD audition discs are extremely dynamic and often exceed N times the normal signal. There are quite a few buddies who try to test the low frequency. They often turn the volume of the amplifier to close to or beyond the 12 o'clock position, often causing the bottoming, the edge shooting phenomenon, and even burning the horn. Pay special attention, especially for the imported bookshelf, they are generally overloaded. The ability is not very strong. (Mainly for commercial reasons, the greater the power, the higher the price). The relative domestic production is better. Due to the long-term continuation of the planned economy and the more honest attitude of the Chinese people, the remaining power margin is larger. Such as "Fei Le ... South Whale, etc.". But don't be afraid, the speakers must be used, not to see, there is no problem with 2 times the rated power in a short time, up to 4 times (very short time).
Generally, you can enjoy the music volume control at 3-10W. What is the concept of 10W? You can use the multimeter to measure the red and black end of the amplifier output, and the AC swing to 9-10V (when 8 Euro speakers), the output at that time. The power is about 10W. The calculation method is: the square of the alternating voltage (V) divided by the impedance of the speaker (Europe) equals the power (W). At this time, the loudness can already feel the shock of the low frequency.
2 Frequency response: (50-37KH2-3dB) Also known as the effective frequency range, it means to give the speaker a constant signal. The characteristic curve of the sound pressure radiated from low frequency to high frequency varies with frequency. The International Electrotechnical Commission (IEC) stipulates that the average sound pressure level is reduced by 10 dB as the effective frequency range of the speaker. It seems that this standard is too low now. The manufacturer's standard is much higher than this standard.
If the speaker frequency response does not indicate how much dB, then the frequency response indicator is meaningless. The strength of the wave is clearly -3dB, reflecting that the box has an extremely flat frequency response curve, which is a single indicator. Words, its playback sound quality must be good. On the contrary, some imported boxes can also be standard -6dB, low-end goods standard -10dB, and some simply do not deliberately add to the impression. The frequency response marked by the same speaker will be different depending on the decibel value.
Such as the power box: 50-37KHZ-3dB
Can also be labeled: 45-40KHZ-6dB
Even worse: 38-42KHZ-10dB
Simply not marked: 32-37KHZ
Therefore, look at the frequency response indicator, we must pay attention to the decibel value, only have a reference meaning (the front 50HZ number represents the lower the bass frequency, the better, the back 37KHZ represents the high frequency, the higher the better. This style 907Be speaker, the standard is rigorous, The indicators are quite high and the performance is definitely good.
3 Impedance 8 ohms, the actual impedance of the speaker is characterized by frequency variation, called the speaker impedance characteristic, which is the maximum at the low frequency resonance frequency f0. When the resonant frequency f0 is gradually increased, the impedance will appear at a minimum. The impedance at this time is called the rated impedance. This sentence may not be easy to understand. It is said that the common point is when the low frequency resonant frequency rises at the corner. Impedance is the rated impedance. It is generally 1.05-1.1 times of the voice coil DC impedance, such as 8 euro rated impedance, the measured voice coil DC resistance is around 7.2. The impedance of the ohm does not affect the sound quality, but is used as a reference value when the power amplifier is placed. The average household speaker is between 4-16 Euros. It is better to choose 8 Euros, especially for the Central Speaker. It is easy to match some when upgrading the main box in the future, because AV power amplification does not recommend you use speakers below 4 Euro.
4 Sensitivity: 89dB, which is a quantitative indicator indicating the efficiency of the speaker's electrical conversion, usually expressed in decibels. The characteristic sensitivity is the sound pressure level (measured in the muffler chamber) measured at the speaker axis IM when the IW pink noise electric power is input to the speaker.
The level of sensitivity index has a certain significance for the optional power amplifier. Because of the customary definition in the industry: each phase is 3dB, the loudness is also doubled, which means that when the speaker is fed the same power, such as 90dB speaker, it is twice as loud as the 87dB speaker. And so on, 93dB is 2 times larger...
Most of the common household speakers on the market are between 84-94dB. I divide them into three levels: 1 low sensitivity, 84-86dB
1 sensitivity, 87-89dB
1 high sensitivity, above 90dB
When choosing a speaker, try to use medium, high-sensitivity (87dB or more), especially playing AV. Generally, the output power of AV power amplifier is limited. On the contrary, it must be equipped with a high-power AV amplifier, otherwise it will promote low-sensitivity speaker pairs (such as Dynaudio, AAD, etc.), in order to achieve some sound effects, you have to artificially increase the output of the AV amplifier, which is unfavorable to the power amplifier. Of course, if you really play Hi-Fi, it is another matter.
5 net weight 12kg, well understand, the general speaker is the heavier the better, the box body is good to eliminate the resonance phenomenon, the international standard weight unit is kg, which is commonly used in China.
6 volumes, generally in millimeters or centimeters, internationally, in inches, 1 inch = 2.54 cm, you can convert it. H stands for height, W stands for width, and D stands for depth.
7 other speakers also have an important distortion indicator, the general manufacturers are not willing to mark. Distortion includes harmonic distortion, intermodulation distortion, phase distortion, etc. Commonly used percentages indicate the degree of distortion. The distortion of the speaker is generally 2-5%, and the model with better imported brand name can be controlled at about 1%. The reason why manufacturers do not want to mark it is compared with other audio equipment, such as power amplifier, CD player, etc., the distortion is in From a few tenths to a few hundred thousandths, the only speakers are too shameful. Why do we often say that the speaker is the most vulnerable part of the audio equipment, mainly refers to its distortion. In the process of electroacoustic conversion, it is difficult to eliminate some mechanical, geometric, electromagnetic, etc.
Let's take the French Jinlang 907Be bookshelf as an example:
1, withstand power: 90W
Frequency response: 50-37KHZ-3dB
3. Weighing impedance: 8 Euro
4, sensitivity: 89dB
5, net weight: 12kg
6, volume: H × W × D 420 × 231 × 348
1 Withstand power of 90W, the nonlinear distortion of the box does not exceed the specified value (generally 1-5%), and the average power that can be continuously fed, also called the rated power, is a dynamic indicator. In actual use, try not to work longer than 90W for a long time, but short-term is allowed and inevitable, because the audio signal contains a lot of quenching signals. In particular, some CD audition discs are extremely dynamic and often exceed N times the normal signal. There are quite a few buddies who try to test the low frequency. They often turn the volume of the amplifier to close to or beyond the 12 o'clock position, often causing the bottoming, the edge shooting phenomenon, and even burning the horn. Pay special attention, especially for the imported bookshelf, they are generally overloaded. The ability is not very strong. (Mainly for commercial reasons, the greater the power, the higher the price). The relative domestic production is better. Due to the long-term continuation of the planned economy and the more honest attitude of the Chinese people, the remaining power margin is larger. Such as "Fei Le ... South Whale, etc.". But don't be afraid, the speakers must be used, not to see, there is no problem with 2 times the rated power in a short time, up to 4 times (very short time).
Generally, you can enjoy the music volume control at 3-10W. What is the concept of 10W? You can use the multimeter to measure the red and black end of the amplifier output, and the AC swing to 9-10V (when 8 Euro speakers), the output at that time. The power is about 10W. The calculation method is: the square of the alternating voltage (V) divided by the impedance of the speaker (Europe) equals the power (W). At this time, the loudness can already feel the shock of the low frequency.
2 Frequency response: (50-37KH2-3dB) Also known as the effective frequency range, it means to give the speaker a constant signal. The characteristic curve of the sound pressure radiated from low frequency to high frequency varies with frequency. The International Electrotechnical Commission (IEC) stipulates that the average sound pressure level is reduced by 10 dB as the effective frequency range of the speaker. It seems that this standard is too low now. The manufacturer's standard is much higher than this standard.
If the speaker frequency response does not indicate how much dB, then the frequency response indicator is meaningless. The strength of the wave is clearly -3dB, reflecting that the box has an extremely flat frequency response curve, which is a single indicator. Words, its playback sound quality must be good. On the contrary, some imported boxes can also be standard -6dB, low-end goods standard -10dB, and some simply do not deliberately add to the impression. The frequency response marked by the same speaker will be different depending on the decibel value.
Such as the power box: 50-37KHZ-3dB
Can also be labeled: 45-40KHZ-6dB
Even worse: 38-42KHZ-10dB
Simply not marked: 32-37KHZ
Therefore, look at the frequency response indicator, we must pay attention to the decibel value, only have a reference meaning (the front 50HZ number represents the lower the bass frequency, the better, the back 37KHZ represents the high frequency, the higher the better. This style 907Be speaker, the standard is rigorous, The indicators are quite high and the performance is definitely good.
3 Impedance 8 ohms, the actual impedance of the speaker is characterized by frequency variation, called the speaker impedance characteristic, which is the maximum at the low frequency resonance frequency f0. When the resonant frequency f0 is gradually increased, the impedance will appear at a minimum. The impedance at this time is called the rated impedance. This sentence may not be easy to understand. It is said that the common point is when the low frequency resonant frequency rises at the corner. Impedance is the rated impedance. It is generally 1.05-1.1 times of the voice coil DC impedance, such as 8 euro rated impedance, the measured voice coil DC resistance is around 7.2. The impedance of the ohm does not affect the sound quality, but is used as a reference value when the power amplifier is placed. The average household speaker is between 4-16 Euros. It is better to choose 8 Euros, especially for the Central Speaker. It is easy to match some when upgrading the main box in the future, because AV power amplification does not recommend you use speakers below 4 Euro.
4 Sensitivity: 89dB, which is a quantitative indicator indicating the efficiency of the speaker's electrical conversion, usually expressed in decibels. The characteristic sensitivity is the sound pressure level (measured in the muffler chamber) measured at the speaker axis IM when the IW pink noise electric power is input to the speaker.
The level of sensitivity index has a certain significance for the optional power amplifier. Because of the customary definition in the industry: each phase is 3dB, the loudness is also doubled, which means that when the speaker is fed the same power, such as 90dB speaker, it is twice as loud as the 87dB speaker. And so on, 93dB is 2 times larger...
Most of the common household speakers on the market are between 84-94dB. I divide them into three levels: 1 low sensitivity, 84-86dB
1 sensitivity, 87-89dB
1 high sensitivity, above 90dB
When choosing a speaker, try to use medium, high-sensitivity (87dB or more), especially playing AV. Generally, the output power of AV power amplifier is limited. On the contrary, it must be equipped with a high-power AV amplifier, otherwise it will promote low-sensitivity speaker pairs (such as Dynaudio, AAD, etc.), in order to achieve some sound effects, you have to artificially increase the output of the AV amplifier, which is unfavorable to the power amplifier. Of course, if you really play Hi-Fi, it is another matter.
5 net weight 12kg, well understand, the general speaker is the heavier the better, the box body is good to eliminate the resonance phenomenon, the international standard weight unit is kg, which is commonly used in China.
6 volumes, generally in millimeters or centimeters, internationally, in inches, 1 inch = 2.54 cm, you can convert it. H stands for height, W stands for width, and D stands for depth.
7 other speakers also have an important distortion indicator, the general manufacturers are not willing to mark. Distortion includes harmonic distortion, intermodulation distortion, phase distortion, etc. Commonly used percentages indicate the degree of distortion. The distortion of the speaker is generally 2-5%, and the model with better imported brand name can be controlled at about 1%. The reason why manufacturers do not want to mark it is compared with other audio equipment, such as power amplifier, CD player, etc., the distortion is in From a few tenths to a few hundred thousandths, the only speakers are too shameful. Why do we often say that the speaker is the most vulnerable part of the audio equipment, mainly refers to its distortion. In the process of electroacoustic conversion, it is difficult to eliminate some mechanical, geometric, electromagnetic, etc.
Let's take the French Jinlang 907Be bookshelf as an example:
1, withstand power: 90W
Frequency response: 50-37KHZ-3dB
3. Weighing impedance: 8 Euro
4, sensitivity: 89dB
5, net weight: 12kg
6, volume: H × W × D 420 × 231 × 348
1 Withstand power of 90W, the nonlinear distortion of the box does not exceed the specified value (generally 1-5%), and the average power that can be continuously fed, also called the rated power, is a dynamic indicator. In actual use, try not to work longer than 90W for a long time, but short-term is allowed and inevitable, because the audio signal contains a lot of quenching signals. In particular, some CD audition discs are extremely dynamic and often exceed N times the normal signal. There are quite a few buddies who try to test the low frequency. They often turn the volume of the amplifier to close to or beyond the 12 o'clock position, often causing the bottoming, the edge shooting phenomenon, and even burning the horn. Pay special attention, especially for the imported bookshelf, they are generally overloaded. The ability is not very strong. (Mainly for commercial reasons, the greater the power, the higher the price). The relative domestic production is better. Due to the long-term continuation of the planned economy and the more honest attitude of the Chinese people, the remaining power margin is larger. Such as "Fei Le ... South Whale, etc.". But don't be afraid, the speakers must be used, not to see, there is no problem with 2 times the rated power in a short time, up to 4 times (very short time).
Generally, you can enjoy the music volume control at 3-10W. What is the concept of 10W? You can use the multimeter to measure the red and black end of the amplifier output, and the AC swing to 9-10V (when 8 Euro speakers), the output at that time. The power is about 10W. The calculation method is: the square of the alternating voltage (V) divided by the impedance of the speaker (Europe) equals the power (W). At this time, the loudness can already feel the shock of the low frequency.
2 Frequency response: (50-37KH2-3dB) Also known as the effective frequency range, it means to give the speaker a constant signal. The characteristic curve of the sound pressure radiated from low frequency to high frequency varies with frequency. The International Electrotechnical Commission (IEC) stipulates that the average sound pressure level is reduced by 10 dB as the effective frequency range of the speaker. It seems that this standard is too low now. The manufacturer's standard is much higher than this standard.
If the speaker frequency response does not indicate how much dB, then the frequency response indicator is meaningless. The strength of the wave is clearly -3dB, reflecting that the box has an extremely flat frequency response curve, which is a single indicator. Words, its playback sound quality must be good. On the contrary, some imported boxes can also be standard -6dB, low-end goods standard -10dB, and some simply do not deliberately add to the impression. The frequency response marked by the same speaker will be different depending on the decibel value.
Such as the power box: 50-37KHZ-3dB
Can also be labeled: 45-40KHZ-6dB
Even worse: 38-42KHZ-10dB
Simply not marked: 32-37KHZ
Therefore, look at the frequency response indicator, we must pay attention to the decibel value, only have a reference meaning (the front 50HZ number represents the lower the bass frequency, the better, the back 37KHZ represents the high frequency, the higher the better. This style 907Be speaker, the standard is rigorous, The indicators are quite high and the performance is definitely good.
3 Impedance 8 ohms, the actual impedance of the speaker is characterized by frequency variation, called the speaker impedance characteristic, which is the maximum at the low frequency resonance frequency f0. When the resonant frequency f0 is gradually increased, the impedance will appear at a minimum. The impedance at this time is called the rated impedance. This sentence may not be easy to understand. It is said that the common point is when the low frequency resonant frequency rises at the corner. Impedance is the rated impedance. It is generally 1.05-1.1 times of the voice coil DC impedance, such as 8 euro rated impedance, the measured voice coil DC resistance is around 7.2. The impedance of the ohm does not affect the sound quality, but is used as a reference value when the power amplifier is placed. The average household speaker is between 4-16 Euros. It is better to choose 8 Euros, especially for the Central Speaker. It is easy to match some when upgrading the main box in the future, because AV power amplification does not recommend you use speakers below 4 Euro.
4 Sensitivity: 89dB, which is a quantitative indicator indicating the efficiency of the speaker's electrical conversion, usually expressed in decibels. The characteristic sensitivity is the sound pressure level (measured in the muffler chamber) measured at the speaker axis IM when the IW pink noise electric power is input to the speaker.
The level of sensitivity index has a certain significance for the optional power amplifier. Because of the customary definition in the industry: each phase is 3dB, the loudness is also doubled, which means that when the speaker is fed the same power, such as 90dB speaker, it is twice as loud as the 87dB speaker. And so on, 93dB is 2 times larger...
Most of the common household speakers on the market are between 84-94dB. I divide them into three levels: 1 low sensitivity, 84-86dB
1 sensitivity, 87-89dB
1 high sensitivity, above 90dB
When choosing a speaker, try to use medium, high-sensitivity (87dB or more), especially playing AV. Generally, the output power of AV power amplifier is limited. On the contrary, it must be equipped with a high-power AV amplifier, otherwise it will promote low-sensitivity speaker pairs (such as Dynaudio, AAD, etc.), in order to achieve some sound effects, you have to artificially increase the output of the AV amplifier, which is unfavorable to the power amplifier. Of course, if you really play Hi-Fi, it is another matter.
5 net weight 12kg, well understand, the general speaker is the heavier the better, the box body is good to eliminate the resonance phenomenon, the international standard weight unit is kg, which is commonly used in China.
6 volumes, generally in millimeters or centimeters, internationally, in inches, 1 inch = 2.54 cm, you can convert it. H stands for height, W stands for width, and D stands for depth.
7 other speakers also have an important distortion indicator, the general manufacturers are not willing to mark. Distortion includes harmonic distortion, intermodulation distortion, phase distortion, etc. Commonly used percentages indicate the degree of distortion. The distortion of the speaker is generally 2-5%, and the model with better imported brand name can be controlled at about 1%. The reason why manufacturers do not want to mark it is compared with other audio equipment, such as power amplifier, CD player, etc., the distortion is in From a few tenths to a few hundred thousandths, the only speakers are too shameful. Why do we often say that the speaker is the most vulnerable part of the audio equipment, mainly refers to its distortion. In the process of electroacoustic conversion, it is difficult to eliminate some mechanical, geometric, electromagnetic, etc.
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