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A comprehensive analysis of car audio use or installation technology common sense one:
The mainframe is the most familiar audio equipment for most people. The various performances and specifications of the mainframe are familiar to you. The following are some of the things you need to pay attention to when using or installing:
LOUDNESS: A few years ago, this button only increased the bass part, so it is called "bass boost". At present, most of the mainframes not only enhance the bass but also enhance the height, so "loudness compensation" is a more appropriate term. Because of human hearing, when whispering, the treble and bass are delayed (FLETCHER MUNSON curve), the loudness compensation function will make the music more pleasant, but when the volume is loud, unless each horn has the appropriate The crossover is protected, otherwise the speaker will easily break.
Grounding problem: Most mainframes are designed so that the negative pole of the horn cannot touch the negative pole of the power supply (ie the car casing), so be careful when loading it. Most of the front-end signals of the main unit are directly grounded, that is, the signal head housing and the power supply negative pole are all connected, and when the external electronic sound separator or amplifier is externally connected, it is better to use the floating grounding equipment (that is, the signal head housing and the negative power have ohms). In order to avoid multi-point grounding, the noise is not easy to handle.
Power problems: Each host has several power cords, each with a different name and purpose:
(1) ACC electricity: commonly known as “passing the keyâ€, when the key is transferred to the “ACC†block, there is a power supply host to let the host work. To listen to the sound, the key must be transferred to the ACC block to open the host. If you connect this line to a direct power source, you can turn on the main unit to listen to the sound at any time without using the key. Some cars have insufficient power supply, such as external audio equipment, which is prone to noise. At this point, it is best to take a line from the battery, pass the relay (RELAY), and then connect to the ACC input of the host, use the original car ACC power to start the relay.
(2) Direct power: Directly energize the bottle, and have power at any time to supply the host computer.
(3) Small lamp or instrument power: When the car light is on, there is electricity supply, and the host indicator light is on.
(4) Starting power: When the main unit is turned on, the main unit outputs electricity for use by other audio equipment, such as raising the automatic antenna, starting the amplifier, and so on. The starting power of most mainframes is not very strong, so it is best to use a relay (RELAY) when connecting two or more amplifiers.
The main function of the electronic crossover is to divide the pre-level music signal (the previous signal of the amplifier into the pre-stage signal), and divide it into two-way or multi-channel according to the characteristics of the speaker and the system, and then push it through the amplifier. The horn "makes each horn to work in the best working range for better results. Here are some proper nouns and their sounds:
‧HIGH-PASS: Qualcomm, that is, the frequency above the crossover point is passed, and the following frequencies are filtered out.
‧ LOW-PASS: Low pass, that is, the frequency below the crossover point passes, and the above frequency is filtered out.
‧BAND-PASS: Zhongtong, consisting of Qualcomm and Lowpass, filters out above and below the set frequency range.
‧CROSSOVER (hz): The crossover point, which is the starting point of the crossover operation.
‧FILTER SLOPE: Filter slope, generally 12dB/OCP, 18dB/OCP, 24dB filtering is the fastest and cleanest, but not necessarily the best, because the frequency connection and phase problem must be considered.
â–“Pre-amplifier: The main function is to strengthen the front-end signal of the host, so that the music dynamics are better, the sound field is wider, and the music is better.
â–“Equalizer: English name is EQUALIZER, referred to as EQ, which increases the expansion of a certain frequency (center frequency) in the music signal to improve the sound quality of the equipment.
â–“Parameter EQ: The English name is PARAMETRIC EQUALIZER, and the center frequency can be adjusted as needed.
The horn is the most mysterious audio equipment. The two speakers with very close appearance may be more than 10 times the price. The physical characteristics of a horn (such as Fs, Qts, Vas, impedance curve, etc.) are unclear. In fact, unless you want to design a speaker or a crossover, these materials are meaningless. As for the power, response frequency and other specifications, only the things to pay attention to when using this horn are provided. There is no way to indicate that the speaker is not good. Here are some things to note:
Impedance: Most car speakers are 4 ohms, but there are also 8 ohms. Some of the original horns of the car are very strange. After two or more speakers, after series or parallel connection, the impedance will change. Because both the main unit and the amplifier must work above 4 ohms (some expansion functions can work below 2 ohms, it is necessary to look at the specifications of the equipment). Pay special attention to the impedance problem. A multi-channel horn system consisting of a passive crossover can avoid the problem of impedance because of the inductance or capacitance.
Withstand power: This is the most important problem for the average consumer to buy a horn. In fact, for the layman, it is meaningless to bear the power. A horn with a power of 80 watts is likely to be pushed by a 25 watt amplifier. A 50 watt horn can be connected to a 200 watt amplifier to emit very beautiful and loud music without getting up. The most important thing to use correctly is to let the speaker work in this part. For example, the treble 3.5KHz (may be 6KHz to see the response frequency) must be filtered out, and filtered below 5å‹100Hz, it is not easy to burn out.
Response frequency: that is, the working range of the speaker, a good system, each speaker works within the working range.
Efficiency: expressed in dB/W/M, that is, one watt of work, how much sound can be produced at a distance of one meter, expressed in dB. When a system consists of multiple speakers, special attention must be paid to efficiency issues to avoid poor matching. If necessary, resistors can be used to reduce the efficiency of the horn. The most common example is to add a high pitch to the original car horn to compensate for the treble. The most added treble is more efficient than the original horn, thus causing the treble too loud. And too sharp, you can connect a resistor in the high-pitched positive line to reduce the volume of the high-pitched sound.
基本 Basic line of passive crossover:
Passive crossovers use capacitors or inductors to amplify the music emitted by the amplifier. Filter out (low pass) above a certain frequency, or filter out (high pass) below, and then connect the speakers to make each speaker within the optimal range. jobs. The most common ones are 6dB/OC and 12dB/OCT. It is common to string a capacitor on the treble. This is 6dB/OCT Qualcomm. The inductance of the string in the subwoofer is 6dB/OCT low pass. The following is the basic line. Please note that the “impedance†in the calculation formula is the impedance of the speaker at the frequency of the classification point. It is necessary to refer to the impedance curve of the speaker. The impedance of the 4 ohm speaker at 3.5 kHz may be 10 ohms. The impedance of the crossover point can also be calculated by equalizing the line: L is the inductance, generally in mH, 1mH = 0.001H, and the number calculated according to the following formula is multiplied by 1,000, which is mH.
C is a capacitor, generally in units of MFD (or written as μF), 1MFD = 0.000001FD, the number calculated according to the following formula and multiplied by 1,000,000 is how much MFD.
L1=R÷(6.28×F) L2=0.3128×R÷F L3=0.3183×R÷F
C1=0.159÷(R×F) C2=0.0796÷(R×F) C3=0.796÷(R×F)
The mainframe is the most familiar audio equipment for most people. The various performances and specifications of the mainframe are familiar to you. The following are some of the things you need to pay attention to when using or installing:
LOUDNESS: A few years ago, this button only increased the bass part, so it is called "bass boost". At present, most of the mainframes not only enhance the bass but also enhance the height, so "loudness compensation" is a more appropriate term. Because of human hearing, when whispering, the treble and bass are delayed (FLETCHER MUNSON curve), the loudness compensation function will make the music more pleasant, but when the volume is loud, unless each horn has the appropriate The crossover is protected, otherwise the speaker will easily break.
Grounding problem: Most mainframes are designed so that the negative pole of the horn cannot touch the negative pole of the power supply (ie the car casing), so be careful when loading it. Most of the front-end signals of the main unit are directly grounded, that is, the signal head housing and the power supply negative pole are all connected, and when the external electronic sound separator or amplifier is externally connected, it is better to use the floating grounding equipment (that is, the signal head housing and the negative power have ohms). In order to avoid multi-point grounding, the noise is not easy to handle.
Power problems: Each host has several power cords, each with a different name and purpose:
(1) ACC electricity: commonly known as “passing the keyâ€, when the key is transferred to the “ACC†block, there is a power supply host to let the host work. To listen to the sound, the key must be transferred to the ACC block to open the host. If you connect this line to a direct power source, you can turn on the main unit to listen to the sound at any time without using the key. Some cars have insufficient power supply, such as external audio equipment, which is prone to noise. At this point, it is best to take a line from the battery, pass the relay (RELAY), and then connect to the ACC input of the host, use the original car ACC power to start the relay.
(2) Direct power: Directly energize the bottle, and have power at any time to supply the host computer.
(3) Small lamp or instrument power: When the car light is on, there is electricity supply, and the host indicator light is on.
(4) Starting power: When the main unit is turned on, the main unit outputs electricity for use by other audio equipment, such as raising the automatic antenna, starting the amplifier, and so on. The starting power of most mainframes is not very strong, so it is best to use a relay (RELAY) when connecting two or more amplifiers.
The main function of the electronic crossover is to divide the pre-level music signal (the previous signal of the amplifier into the pre-stage signal), and divide it into two-way or multi-channel according to the characteristics of the speaker and the system, and then push it through the amplifier. The horn "makes each horn to work in the best working range for better results. Here are some proper nouns and their sounds:
‧HIGH-PASS: Qualcomm, that is, the frequency above the crossover point is passed, and the following frequencies are filtered out.
‧ LOW-PASS: Low pass, that is, the frequency below the crossover point passes, and the above frequency is filtered out.
‧BAND-PASS: Zhongtong, consisting of Qualcomm and Lowpass, filters out above and below the set frequency range.
‧CROSSOVER (hz): The crossover point, which is the starting point of the crossover operation.
‧FILTER SLOPE: Filter slope, generally 12dB/OCP, 18dB/OCP, 24dB filtering is the fastest and cleanest, but not necessarily the best, because the frequency connection and phase problem must be considered.
â–“Pre-amplifier: The main function is to strengthen the front-end signal of the host, so that the music dynamics are better, the sound field is wider, and the music is better.
â–“Equalizer: English name is EQUALIZER, referred to as EQ, which increases the expansion of a certain frequency (center frequency) in the music signal to improve the sound quality of the equipment.
â–“Parameter EQ: The English name is PARAMETRIC EQUALIZER, and the center frequency can be adjusted as needed.
The horn is the most mysterious audio equipment. The two speakers with very close appearance may be more than 10 times the price. The physical characteristics of a horn (such as Fs, Qts, Vas, impedance curve, etc.) are unclear. In fact, unless you want to design a speaker or a crossover, these materials are meaningless. As for the power, response frequency and other specifications, only the things to pay attention to when using this horn are provided. There is no way to indicate that the speaker is not good. Here are some things to note:
Impedance: Most car speakers are 4 ohms, but there are also 8 ohms. Some of the original horns of the car are very strange. After two or more speakers, after series or parallel connection, the impedance will change. Because both the main unit and the amplifier must work above 4 ohms (some expansion functions can work below 2 ohms, it is necessary to look at the specifications of the equipment). Pay special attention to the impedance problem. A multi-channel horn system consisting of a passive crossover can avoid the problem of impedance because of the inductance or capacitance.
Withstand power: This is the most important problem for the average consumer to buy a horn. In fact, for the layman, it is meaningless to bear the power. A horn with a power of 80 watts is likely to be pushed by a 25 watt amplifier. A 50 watt horn can be connected to a 200 watt amplifier to emit very beautiful and loud music without getting up. The most important thing to use correctly is to let the speaker work in this part. For example, the treble 3.5KHz (may be 6KHz to see the response frequency) must be filtered out, and filtered below 5å‹100Hz, it is not easy to burn out.
Response frequency: that is, the working range of the speaker, a good system, each speaker works within the working range.
Efficiency: expressed in dB/W/M, that is, one watt of work, how much sound can be produced at a distance of one meter, expressed in dB. When a system consists of multiple speakers, special attention must be paid to efficiency issues to avoid poor matching. If necessary, resistors can be used to reduce the efficiency of the horn. The most common example is to add a high pitch to the original car horn to compensate for the treble. The most added treble is more efficient than the original horn, thus causing the treble too loud. And too sharp, you can connect a resistor in the high-pitched positive line to reduce the volume of the high-pitched sound.
基本 Basic line of passive crossover:
Passive crossovers use capacitors or inductors to amplify the music emitted by the amplifier. Filter out (low pass) above a certain frequency, or filter out (high pass) below, and then connect the speakers to make each speaker within the optimal range. jobs. The most common ones are 6dB/OC and 12dB/OCT. It is common to string a capacitor on the treble. This is 6dB/OCT Qualcomm. The inductance of the string in the subwoofer is 6dB/OCT low pass. The following is the basic line. Please note that the “impedance†in the calculation formula is the impedance of the speaker at the frequency of the classification point. It is necessary to refer to the impedance curve of the speaker. The impedance of the 4 ohm speaker at 3.5 kHz may be 10 ohms. The impedance of the crossover point can also be calculated by equalizing the line: L is the inductance, generally in mH, 1mH = 0.001H, and the number calculated according to the following formula is multiplied by 1,000, which is mH.
C is a capacitor, generally in units of MFD (or written as μF), 1MFD = 0.000001FD, the number calculated according to the following formula and multiplied by 1,000,000 is how much MFD.
L1=R÷(6.28×F) L2=0.3128×R÷F L3=0.3183×R÷F
C1=0.159÷(R×F) C2=0.0796÷(R×F) C3=0.796÷(R×F)
The mainframe is the most familiar audio equipment for most people. The various performances and specifications of the mainframe are familiar to you. The following are some of the things you need to pay attention to when using or installing:
LOUDNESS: A few years ago, this button only increased the bass part, so it is called "bass boost". At present, most of the mainframes not only enhance the bass but also enhance the height, so "loudness compensation" is a more appropriate term. Because of human hearing, when whispering, the treble and bass are delayed (FLETCHER MUNSON curve), the loudness compensation function will make the music more pleasant, but when the volume is loud, unless each horn has the appropriate The crossover is protected, otherwise the speaker will easily break.
Grounding problem: Most mainframes are designed so that the negative pole of the horn cannot touch the negative pole of the power supply (ie the car casing), so be careful when loading it. Most of the front-end signals of the main unit are directly grounded, that is, the signal head housing and the power supply negative pole are all connected, and when the external electronic sound separator or amplifier is externally connected, it is better to use the floating grounding equipment (that is, the signal head housing and the negative power have ohms). In order to avoid multi-point grounding, the noise is not easy to handle.
Power problems: Each host has several power cords, each with a different name and purpose:
(1) ACC electricity: commonly known as “passing the keyâ€, when the key is transferred to the “ACC†block, there is a power supply host to let the host work. To listen to the sound, the key must be transferred to the ACC block to open the host. If you connect this line to a direct power source, you can turn on the main unit to listen to the sound at any time without using the key. Some cars have insufficient power supply, such as external audio equipment, which is prone to noise. At this point, it is best to take a line from the battery, pass the relay (RELAY), and then connect to the ACC input of the host, use the original car ACC power to start the relay.
(2) Direct power: Directly energize the bottle, and have power at any time to supply the host computer.
(3) Small lamp or instrument power: When the car light is on, there is electricity supply, and the host indicator light is on.
(4) Starting power: When the main unit is turned on, the main unit outputs electricity for use by other audio equipment, such as raising the automatic antenna, starting the amplifier, and so on. The starting power of most mainframes is not very strong, so it is best to use a relay (RELAY) when connecting two or more amplifiers.
The main function of the electronic crossover is to divide the pre-level music signal (the previous signal of the amplifier into the pre-stage signal), and divide it into two-way or multi-channel according to the characteristics of the speaker and the system, and then push it through the amplifier. The horn "makes each horn to work in the best working range for better results. Here are some proper nouns and their sounds:
‧HIGH-PASS: Qualcomm, that is, the frequency above the crossover point is passed, and the following frequencies are filtered out.
‧ LOW-PASS: Low pass, that is, the frequency below the crossover point passes, and the above frequency is filtered out.
‧BAND-PASS: Zhongtong, consisting of Qualcomm and Lowpass, filters out above and below the set frequency range.
‧CROSSOVER (hz): The crossover point, which is the starting point of the crossover operation.
‧FILTER SLOPE: Filter slope, generally 12dB/OCP, 18dB/OCP, 24dB filtering is the fastest and cleanest, but not necessarily the best, because the frequency connection and phase problem must be considered.
â–“Pre-amplifier: The main function is to strengthen the front-end signal of the host, so that the music dynamics are better, the sound field is wider, and the music is better.
â–“Equalizer: English name is EQUALIZER, referred to as EQ, which increases the expansion of a certain frequency (center frequency) in the music signal to improve the sound quality of the equipment.
â–“Parameter EQ: The English name is PARAMETRIC EQUALIZER, and the center frequency can be adjusted as needed.
The horn is the most mysterious audio equipment. The two speakers with very close appearance may be more than 10 times the price. The physical characteristics of a horn (such as Fs, Qts, Vas, impedance curve, etc.) are unclear. In fact, unless you want to design a speaker or a crossover, these materials are meaningless. As for the power, response frequency and other specifications, only the things to pay attention to when using this horn are provided. There is no way to indicate that the speaker is not good. Here are some things to note:
Impedance: Most car speakers are 4 ohms, but there are also 8 ohms. Some of the original horns of the car are very strange. After two or more speakers, after series or parallel connection, the impedance will change. Because both the main unit and the amplifier must work above 4 ohms (some expansion functions can work below 2 ohms, it is necessary to look at the specifications of the equipment). Pay special attention to the impedance problem. A multi-channel horn system consisting of a passive crossover can avoid the problem of impedance because of the inductance or capacitance.
Withstand power: This is the most important problem for the average consumer to buy a horn. In fact, for the layman, it is meaningless to bear the power. A horn with a power of 80 watts is likely to be pushed by a 25 watt amplifier. A 50 watt horn can be connected to a 200 watt amplifier to emit very beautiful and loud music without getting up. The most important thing to use correctly is to let the speaker work in this part. For example, the treble 3.5KHz (may be 6KHz to see the response frequency) must be filtered out, and filtered below 5å‹100Hz, it is not easy to burn out.
Response frequency: that is, the working range of the speaker, a good system, each speaker works within the working range.
Efficiency: expressed in dB/W/M, that is, one watt of work, how much sound can be produced at a distance of one meter, expressed in dB. When a system consists of multiple speakers, special attention must be paid to efficiency issues to avoid poor matching. If necessary, resistors can be used to reduce the efficiency of the horn. The most common example is to add a high pitch to the original car horn to compensate for the treble. The most added treble is more efficient than the original horn, thus causing the treble too loud. And too sharp, you can connect a resistor in the high-pitched positive line to reduce the volume of the high-pitched sound.
基本 Basic line of passive crossover:
Passive crossovers use capacitors or inductors to amplify the music emitted by the amplifier. Filter out (low pass) above a certain frequency, or filter out (high pass) below, and then connect the speakers to make each speaker within the optimal range. jobs. The most common ones are 6dB/OC and 12dB/OCT. It is common to string a capacitor on the treble. This is 6dB/OCT Qualcomm. The inductance of the string in the subwoofer is 6dB/OCT low pass. The following is the basic line. Please note that the “impedance†in the calculation formula is the impedance of the speaker at the frequency of the classification point. It is necessary to refer to the impedance curve of the speaker. The impedance of the 4 ohm speaker at 3.5 kHz may be 10 ohms. The impedance of the crossover point can also be calculated by equalizing the line: L is the inductance, generally in mH, 1mH = 0.001H, and the number calculated according to the following formula is multiplied by 1,000, which is mH.
C is a capacitor, generally in units of MFD (or written as μF), 1MFD = 0.000001FD, the number calculated according to the following formula and multiplied by 1,000,000 is how much MFD.
L1=R÷(6.28×F) L2=0.3128×R÷F L3=0.3183×R÷F
C1=0.159÷(R×F) C2=0.0796÷(R×F) C3=0.796÷(R×F)
A comprehensive analysis of car audio use or installation technology common sense one:
The mainframe is the most familiar audio equipment for most people. The various performances and specifications of the mainframe are familiar to you. The following are some of the things you need to pay attention to when using or installing:
LOUDNESS: A few years ago, this button only increased the bass part, so it is called "bass boost". At present, most of the mainframes not only enhance the bass but also enhance the height, so "loudness compensation" is a more appropriate term. Because of human hearing, when whispering, the treble and bass are delayed (FLETCHER MUNSON curve), the loudness compensation function will make the music more pleasant, but when the volume is loud, unless each horn has the appropriate The crossover is protected, otherwise the speaker will easily break.
Grounding problem: Most mainframes are designed so that the negative pole of the horn cannot touch the negative pole of the power supply (ie the car casing), so be careful when loading it. Most of the front-end signals of the main unit are directly grounded, that is, the signal head housing and the power supply negative pole are all connected, and when the external electronic sound separator or amplifier is externally connected, it is better to use the floating grounding equipment (that is, the signal head housing and the negative power have ohms). In order to avoid multi-point grounding, the noise is not easy to handle.
Power problems: Each host has several power cords, each with a different name and purpose:
(1) ACC electricity: commonly known as “passing the keyâ€, when the key is transferred to the “ACC†block, there is a power supply host to let the host work. To listen to the sound, the key must be transferred to the ACC block to open the host. If you connect this line to a direct power source, you can turn on the main unit to listen to the sound at any time without using the key. Some cars have insufficient power supply, such as external audio equipment, which is prone to noise. At this point, it is best to take a line from the battery, pass the relay (RELAY), and then connect to the ACC input of the host, use the original car ACC power to start the relay.
(2) Direct power: Directly energize the bottle, and have power at any time to supply the host computer.
(3) Small lamp or instrument power: When the car light is on, there is electricity supply, and the host indicator light is on.
(4) Starting power: When the main unit is turned on, the main unit outputs electricity for use by other audio equipment, such as raising the automatic antenna, starting the amplifier, and so on. The starting power of most mainframes is not very strong, so it is best to use a relay (RELAY) when connecting two or more amplifiers.
The main function of the electronic crossover is to divide the pre-level music signal (the previous signal of the amplifier into the pre-stage signal), and divide it into two-way or multi-channel according to the characteristics of the speaker and the system, and then push it through the amplifier. The horn "makes each horn to work in the best working range for better results. Here are some proper nouns and their sounds:
‧HIGH-PASS: Qualcomm, that is, the frequency above the crossover point is passed, and the following frequencies are filtered out.
‧ LOW-PASS: Low pass, that is, the frequency below the crossover point passes, and the above frequency is filtered out.
‧BAND-PASS: Zhongtong, consisting of Qualcomm and Lowpass, filters out above and below the set frequency range.
‧CROSSOVER (hz): The crossover point, which is the starting point of the crossover operation.
‧FILTER SLOPE: Filter slope, generally 12dB/OCP, 18dB/OCP, 24dB filtering is the fastest and cleanest, but not necessarily the best, because the frequency connection and phase problem must be considered.
â–“Pre-amplifier: The main function is to strengthen the front-end signal of the host, so that the music dynamics are better, the sound field is wider, and the music is better.
â–“Equalizer: English name is EQUALIZER, referred to as EQ, which increases the expansion of a certain frequency (center frequency) in the music signal to improve the sound quality of the equipment.
â–“Parameter EQ: The English name is PARAMETRIC EQUALIZER, and the center frequency can be adjusted as needed.
The horn is the most mysterious audio equipment. The two speakers with very close appearance may be more than 10 times the price. The physical characteristics of a horn (such as Fs, Qts, Vas, impedance curve, etc.) are unclear. In fact, unless you want to design a speaker or a crossover, these materials are meaningless. As for the power, response frequency and other specifications, only the things to pay attention to when using this horn are provided. There is no way to indicate that the speaker is not good. Here are some things to note:
Impedance: Most car speakers are 4 ohms, but there are also 8 ohms. Some of the original horns of the car are very strange. After two or more speakers, after series or parallel connection, the impedance will change. Because both the main unit and the amplifier must work above 4 ohms (some expansion functions can work below 2 ohms, it is necessary to look at the specifications of the equipment). Pay special attention to the impedance problem. A multi-channel horn system consisting of a passive crossover can avoid the problem of impedance because of the inductance or capacitance.
Withstand power: This is the most important problem for the average consumer to buy a horn. In fact, for the layman, it is meaningless to bear the power. A horn with a power of 80 watts is likely to be pushed by a 25 watt amplifier. A 50 watt horn can be connected to a 200 watt amplifier to emit very beautiful and loud music without getting up. The most important thing to use correctly is to let the speaker work in this part. For example, the treble 3.5KHz (may be 6KHz to see the response frequency) must be filtered out, and filtered below 5å‹100Hz, it is not easy to burn out.
Response frequency: that is, the working range of the speaker, a good system, each speaker works within the working range.
Efficiency: expressed in dB/W/M, that is, one watt of work, how much sound can be produced at a distance of one meter, expressed in dB. When a system consists of multiple speakers, special attention must be paid to efficiency issues to avoid poor matching. If necessary, resistors can be used to reduce the efficiency of the horn. The most common example is to add a high pitch to the original car horn to compensate for the treble. The most added treble is more efficient than the original horn, thus causing the treble too loud. And too sharp, you can connect a resistor in the high-pitched positive line to reduce the volume of the high-pitched sound.
基本 Basic line of passive crossover:
Passive crossovers use capacitors or inductors to amplify the music emitted by the amplifier. Filter out (low pass) above a certain frequency, or filter out (high pass) below, and then connect the speakers to make each speaker within the optimal range. jobs. The most common ones are 6dB/OC and 12dB/OCT. It is common to string a capacitor on the treble. This is 6dB/OCT Qualcomm. The inductance of the string in the subwoofer is 6dB/OCT low pass. The following is the basic line. Please note that the “impedance†in the calculation formula is the impedance of the speaker at the frequency of the classification point. It is necessary to refer to the impedance curve of the speaker. The impedance of the 4 ohm speaker at 3.5 kHz may be 10 ohms. The impedance of the crossover point can also be calculated by equalizing the line: L is the inductance, generally in mH, 1mH = 0.001H, and the number calculated according to the following formula is multiplied by 1,000, which is mH.
C is a capacitor, generally in units of MFD (or written as μF), 1MFD = 0.000001FD, the number calculated according to the following formula and multiplied by 1,000,000 is how much MFD.
L1=R÷(6.28×F) L2=0.3128×R÷F L3=0.3183×R÷F
C1=0.159÷(R×F) C2=0.0796÷(R×F) C3=0.796÷(R×F)
The mainframe is the most familiar audio equipment for most people. The various performances and specifications of the mainframe are familiar to you. The following are some of the things you need to pay attention to when using or installing:
LOUDNESS: A few years ago, this button only increased the bass part, so it is called "bass boost". At present, most of the mainframes not only enhance the bass but also enhance the height, so "loudness compensation" is a more appropriate term. Because of human hearing, when whispering, the treble and bass are delayed (FLETCHER MUNSON curve), the loudness compensation function will make the music more pleasant, but when the volume is loud, unless each horn has the appropriate The crossover is protected, otherwise the speaker will easily break.
Grounding problem: Most mainframes are designed so that the negative pole of the horn cannot touch the negative pole of the power supply (ie the car casing), so be careful when loading it. Most of the front-end signals of the main unit are directly grounded, that is, the signal head housing and the power supply negative pole are all connected, and when the external electronic sound separator or amplifier is externally connected, it is better to use the floating grounding equipment (that is, the signal head housing and the negative power have ohms). In order to avoid multi-point grounding, the noise is not easy to handle.
Power problems: Each host has several power cords, each with a different name and purpose:
(1) ACC electricity: commonly known as “passing the keyâ€, when the key is transferred to the “ACC†block, there is a power supply host to let the host work. To listen to the sound, the key must be transferred to the ACC block to open the host. If you connect this line to a direct power source, you can turn on the main unit to listen to the sound at any time without using the key. Some cars have insufficient power supply, such as external audio equipment, which is prone to noise. At this point, it is best to take a line from the battery, pass the relay (RELAY), and then connect to the ACC input of the host, use the original car ACC power to start the relay.
(2) Direct power: Directly energize the bottle, and have power at any time to supply the host computer.
(3) Small lamp or instrument power: When the car light is on, there is electricity supply, and the host indicator light is on.
(4) Starting power: When the main unit is turned on, the main unit outputs electricity for use by other audio equipment, such as raising the automatic antenna, starting the amplifier, and so on. The starting power of most mainframes is not very strong, so it is best to use a relay (RELAY) when connecting two or more amplifiers.
The main function of the electronic crossover is to divide the pre-level music signal (the previous signal of the amplifier into the pre-stage signal), and divide it into two-way or multi-channel according to the characteristics of the speaker and the system, and then push it through the amplifier. The horn "makes each horn to work in the best working range for better results. Here are some proper nouns and their sounds:
‧HIGH-PASS: Qualcomm, that is, the frequency above the crossover point is passed, and the following frequencies are filtered out.
‧ LOW-PASS: Low pass, that is, the frequency below the crossover point passes, and the above frequency is filtered out.
‧BAND-PASS: Zhongtong, consisting of Qualcomm and Lowpass, filters out above and below the set frequency range.
‧CROSSOVER (hz): The crossover point, which is the starting point of the crossover operation.
‧FILTER SLOPE: Filter slope, generally 12dB/OCP, 18dB/OCP, 24dB filtering is the fastest and cleanest, but not necessarily the best, because the frequency connection and phase problem must be considered.
â–“Pre-amplifier: The main function is to strengthen the front-end signal of the host, so that the music dynamics are better, the sound field is wider, and the music is better.
â–“Equalizer: English name is EQUALIZER, referred to as EQ, which increases the expansion of a certain frequency (center frequency) in the music signal to improve the sound quality of the equipment.
â–“Parameter EQ: The English name is PARAMETRIC EQUALIZER, and the center frequency can be adjusted as needed.
The horn is the most mysterious audio equipment. The two speakers with very close appearance may be more than 10 times the price. The physical characteristics of a horn (such as Fs, Qts, Vas, impedance curve, etc.) are unclear. In fact, unless you want to design a speaker or a crossover, these materials are meaningless. As for the power, response frequency and other specifications, only the things to pay attention to when using this horn are provided. There is no way to indicate that the speaker is not good. Here are some things to note:
Impedance: Most car speakers are 4 ohms, but there are also 8 ohms. Some of the original horns of the car are very strange. After two or more speakers, after series or parallel connection, the impedance will change. Because both the main unit and the amplifier must work above 4 ohms (some expansion functions can work below 2 ohms, it is necessary to look at the specifications of the equipment). Pay special attention to the impedance problem. A multi-channel horn system consisting of a passive crossover can avoid the problem of impedance because of the inductance or capacitance.
Withstand power: This is the most important problem for the average consumer to buy a horn. In fact, for the layman, it is meaningless to bear the power. A horn with a power of 80 watts is likely to be pushed by a 25 watt amplifier. A 50 watt horn can be connected to a 200 watt amplifier to emit very beautiful and loud music without getting up. The most important thing to use correctly is to let the speaker work in this part. For example, the treble 3.5KHz (may be 6KHz to see the response frequency) must be filtered out, and filtered below 5å‹100Hz, it is not easy to burn out.
Response frequency: that is, the working range of the speaker, a good system, each speaker works within the working range.
Efficiency: expressed in dB/W/M, that is, one watt of work, how much sound can be produced at a distance of one meter, expressed in dB. When a system consists of multiple speakers, special attention must be paid to efficiency issues to avoid poor matching. If necessary, resistors can be used to reduce the efficiency of the horn. The most common example is to add a high pitch to the original car horn to compensate for the treble. The most added treble is more efficient than the original horn, thus causing the treble too loud. And too sharp, you can connect a resistor in the high-pitched positive line to reduce the volume of the high-pitched sound.
基本 Basic line of passive crossover:
Passive crossovers use capacitors or inductors to amplify the music emitted by the amplifier. Filter out (low pass) above a certain frequency, or filter out (high pass) below, and then connect the speakers to make each speaker within the optimal range. jobs. The most common ones are 6dB/OC and 12dB/OCT. It is common to string a capacitor on the treble. This is 6dB/OCT Qualcomm. The inductance of the string in the subwoofer is 6dB/OCT low pass. The following is the basic line. Please note that the “impedance†in the calculation formula is the impedance of the speaker at the frequency of the classification point. It is necessary to refer to the impedance curve of the speaker. The impedance of the 4 ohm speaker at 3.5 kHz may be 10 ohms. The impedance of the crossover point can also be calculated by equalizing the line: L is the inductance, generally in mH, 1mH = 0.001H, and the number calculated according to the following formula is multiplied by 1,000, which is mH.
C is a capacitor, generally in units of MFD (or written as μF), 1MFD = 0.000001FD, the number calculated according to the following formula and multiplied by 1,000,000 is how much MFD.
L1=R÷(6.28×F) L2=0.3128×R÷F L3=0.3183×R÷F
C1=0.159÷(R×F) C2=0.0796÷(R×F) C3=0.796÷(R×F)
The mainframe is the most familiar audio equipment for most people. The various performances and specifications of the mainframe are familiar to you. The following are some of the things you need to pay attention to when using or installing:
LOUDNESS: A few years ago, this button only increased the bass part, so it is called "bass boost". At present, most of the mainframes not only enhance the bass but also enhance the height, so "loudness compensation" is a more appropriate term. Because of human hearing, when whispering, the treble and bass are delayed (FLETCHER MUNSON curve), the loudness compensation function will make the music more pleasant, but when the volume is loud, unless each horn has the appropriate The crossover is protected, otherwise the speaker will easily break.
Grounding problem: Most mainframes are designed so that the negative pole of the horn cannot touch the negative pole of the power supply (ie the car casing), so be careful when loading it. Most of the front-end signals of the main unit are directly grounded, that is, the signal head housing and the power supply negative pole are all connected, and when the external electronic sound separator or amplifier is externally connected, it is better to use the floating grounding equipment (that is, the signal head housing and the negative power have ohms). In order to avoid multi-point grounding, the noise is not easy to handle.
Power problems: Each host has several power cords, each with a different name and purpose:
(1) ACC electricity: commonly known as “passing the keyâ€, when the key is transferred to the “ACC†block, there is a power supply host to let the host work. To listen to the sound, the key must be transferred to the ACC block to open the host. If you connect this line to a direct power source, you can turn on the main unit to listen to the sound at any time without using the key. Some cars have insufficient power supply, such as external audio equipment, which is prone to noise. At this point, it is best to take a line from the battery, pass the relay (RELAY), and then connect to the ACC input of the host, use the original car ACC power to start the relay.
(2) Direct power: Directly energize the bottle, and have power at any time to supply the host computer.
(3) Small lamp or instrument power: When the car light is on, there is electricity supply, and the host indicator light is on.
(4) Starting power: When the main unit is turned on, the main unit outputs electricity for use by other audio equipment, such as raising the automatic antenna, starting the amplifier, and so on. The starting power of most mainframes is not very strong, so it is best to use a relay (RELAY) when connecting two or more amplifiers.
The main function of the electronic crossover is to divide the pre-level music signal (the previous signal of the amplifier into the pre-stage signal), and divide it into two-way or multi-channel according to the characteristics of the speaker and the system, and then push it through the amplifier. The horn "makes each horn to work in the best working range for better results. Here are some proper nouns and their sounds:
‧HIGH-PASS: Qualcomm, that is, the frequency above the crossover point is passed, and the following frequencies are filtered out.
‧ LOW-PASS: Low pass, that is, the frequency below the crossover point passes, and the above frequency is filtered out.
‧BAND-PASS: Zhongtong, consisting of Qualcomm and Lowpass, filters out above and below the set frequency range.
‧CROSSOVER (hz): The crossover point, which is the starting point of the crossover operation.
‧FILTER SLOPE: Filter slope, generally 12dB/OCP, 18dB/OCP, 24dB filtering is the fastest and cleanest, but not necessarily the best, because the frequency connection and phase problem must be considered.
â–“Pre-amplifier: The main function is to strengthen the front-end signal of the host, so that the music dynamics are better, the sound field is wider, and the music is better.
â–“Equalizer: English name is EQUALIZER, referred to as EQ, which increases the expansion of a certain frequency (center frequency) in the music signal to improve the sound quality of the equipment.
â–“Parameter EQ: The English name is PARAMETRIC EQUALIZER, and the center frequency can be adjusted as needed.
The horn is the most mysterious audio equipment. The two speakers with very close appearance may be more than 10 times the price. The physical characteristics of a horn (such as Fs, Qts, Vas, impedance curve, etc.) are unclear. In fact, unless you want to design a speaker or a crossover, these materials are meaningless. As for the power, response frequency and other specifications, only the things to pay attention to when using this horn are provided. There is no way to indicate that the speaker is not good. Here are some things to note:
Impedance: Most car speakers are 4 ohms, but there are also 8 ohms. Some of the original horns of the car are very strange. After two or more speakers, after series or parallel connection, the impedance will change. Because both the main unit and the amplifier must work above 4 ohms (some expansion functions can work below 2 ohms, it is necessary to look at the specifications of the equipment). Pay special attention to the impedance problem. A multi-channel horn system consisting of a passive crossover can avoid the problem of impedance because of the inductance or capacitance.
Withstand power: This is the most important problem for the average consumer to buy a horn. In fact, for the layman, it is meaningless to bear the power. A horn with a power of 80 watts is likely to be pushed by a 25 watt amplifier. A 50 watt horn can be connected to a 200 watt amplifier to emit very beautiful and loud music without getting up. The most important thing to use correctly is to let the speaker work in this part. For example, the treble 3.5KHz (may be 6KHz to see the response frequency) must be filtered out, and filtered below 5å‹100Hz, it is not easy to burn out.
Response frequency: that is, the working range of the speaker, a good system, each speaker works within the working range.
Efficiency: expressed in dB/W/M, that is, one watt of work, how much sound can be produced at a distance of one meter, expressed in dB. When a system consists of multiple speakers, special attention must be paid to efficiency issues to avoid poor matching. If necessary, resistors can be used to reduce the efficiency of the horn. The most common example is to add a high pitch to the original car horn to compensate for the treble. The most added treble is more efficient than the original horn, thus causing the treble too loud. And too sharp, you can connect a resistor in the high-pitched positive line to reduce the volume of the high-pitched sound.
基本 Basic line of passive crossover:
Passive crossovers use capacitors or inductors to amplify the music emitted by the amplifier. Filter out (low pass) above a certain frequency, or filter out (high pass) below, and then connect the speakers to make each speaker within the optimal range. jobs. The most common ones are 6dB/OC and 12dB/OCT. It is common to string a capacitor on the treble. This is 6dB/OCT Qualcomm. The inductance of the string in the subwoofer is 6dB/OCT low pass. The following is the basic line. Please note that the “impedance†in the calculation formula is the impedance of the speaker at the frequency of the classification point. It is necessary to refer to the impedance curve of the speaker. The impedance of the 4 ohm speaker at 3.5 kHz may be 10 ohms. The impedance of the crossover point can also be calculated by equalizing the line: L is the inductance, generally in mH, 1mH = 0.001H, and the number calculated according to the following formula is multiplied by 1,000, which is mH.
C is a capacitor, generally in units of MFD (or written as μF), 1MFD = 0.000001FD, the number calculated according to the following formula and multiplied by 1,000,000 is how much MFD.
L1=R÷(6.28×F) L2=0.3128×R÷F L3=0.3183×R÷F
C1=0.159÷(R×F) C2=0.0796÷(R×F) C3=0.796÷(R×F)
Flexible tube water cooling and hard tube water cooling are two forms of water-cooled computer. The flexible tube water cooling computer has the advantages of simple, safe and low cost, but it also has the disadvantage of aging and lack of individuality.The hard tube water cooling computer has the advantages of fashionable beautiful, safe and durability, the versatility of accessories, and better DIY experience, but it also has the shortcoming of time-consuming, expensive and easy to leak. Speaking objectively, flexible tube water cooling computer are more suitable for water cooling green hands.
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Dongyuan Syscooling Technology Co., Ltd. , http://www.syscooling.com