A qualified professional power amplifier often reaches the corresponding technical parameters. The following eight technical indicators cannot be ignored.
1, the frequency response capability (Power Band Width): frequency response range of 20Hz ~ 80KHz, and the speaker's frequency response from bass to treble corresponding requirements 20Hz ~ 20KHz range of response. As the "bottleneck" component of signal transmission, the amplifier requires a wider frequency response, such as 7Hz to 80KHz, to ensure the integrity of the signal.
2, Signal to Noise Ratio (Signal to Noise Ratio): This is the most direct reflection of the quality of the amplifier parameters, generally in the 80dB ratio above, high-quality products often reach more than 105dB, if you pursue pure sound quality, then this The value cannot be ignored.
3, distortion (THD): This can be combined with the amplifier two other important indicators "Rated Power" (Rms) and "Max Power" (Peak Power) discussed together. One amplifier operates at its Rms power and the distortion should be relatively small, typically in the range of 0.5% to 0.01%. Peak power or bridging, the signal may be deformed, clipping (incomplete signal) and other distortion, the distortion ratio will also increase, about 0.5% to 1% are normal. The smaller the distortion ratio, the better the acoustic effect, which is an important indicator of a power amplifier.
4, Input Sensitivity (Input Sensitivity): This is for different manufacturers, different brands of host, pre-level audio source and set the level of adjustment, range from 100mv ~ 4V or even higher, must match with the sound source when tuning.
5, Input impedance (Input Impedance): Generally require the amplifier input impedance is higher, the output impedance is lower, the higher the input impedance, can more effectively block all types of noise, the common value is 10KΩ or higher.
6, the load capacity (Load Impedance): home power amplifier is generally 8Ω / 4Ω two; car power in stereo when the 2Ω to 8Ω; bridge when the 4Ω to 8Ω. However, individual specially designed amplifiers can be as low as 0.1Ω in impedance and have extraordinary capabilities. At this time, a power amplifier can connect dozens of woofers together to create an ideal sound pressure level (sound pressure refers to the pressure generated by the sound on the human ear. It is a measure of the ability of a sound system because the higher the sound pressure, The higher the system requirements, the higher the domestic maximum record is 141.5dB and 176.5dB abroad. Just like the dozens of woofers in the car, the vans that can shake the glass all over, but in this situation, I'm afraid we can only see it in the sound competition.
7. Working voltage: Car audio works normally in the range of 10V-15V.
8, Damping coefficient (Damping Factor): This coefficient is calculated from the rated load (4Ω) output impedance, it is generally believed that: the smaller the output impedance, the higher the damping coefficient, the better the amplifier. In fact, high-quality amplifiers have a ratio of more than 50, and individual numbers even exceed 500. Although some experts think that the damping coefficient of about 50 is sufficient, judging by my personal experience, if the coefficient is high, the wire requirements can be relaxed. On the other hand, too high a coefficient can affect the tone, but it can help bass performance.
9. Slew Rate: The highest amplification stage of the power amplifier in a unit of time magnifies the strong signal excitation into high-voltage, high-current AC audio. The high-end models are more than 30V/us, and individual super 50V/us. The ratio is high, the conversion ability is good, the level and dynamics of the music, when combined with the speaker, the reproduction can be restored closer to the original sound.
Power amplifier and speaker matching
Power amplifiers and speakers are mainly matched with power and style.
Power collocation: If you are playing acoustics first and you want to DIY yourself and not want to fake the hands of others, I suggest the same Rms power. First, it is not easy to burst the horn, and it is not easy to burn the coil (power is not enough, it is easy to burn the horn coil). If it is a master and economically plentiful, it is worthwhile for the “big horse-drawn car” to use high-power amplifiers to promote the horns and pursue meticulous sounds.
Style collocation: Japan, the United States equipment, have consciously to compensate for low frequency, high frequency, the sound is often less than European product balance. Different tastes, the monarch himself appreciate it.
Power installation on the car
Many introductions must have made you realize the importance of power amplifiers for the entire audio system. Due to the "hard work" in the amplifier, it is very important to ensure that the amplifier is properly installed.
First of all, to install the amplifier in the car, in addition to considering the matching with the horn, the supply of electricity, including wire considerations, reasonable wiring, should pay attention in advance. When installing, all kinds of wire should avoid short circuit, it is best to install insulation, such as the increase of density board (this is a special wooden board, commonly used for speaker production, also known as wooden board), to avoid direct nailing on the body of iron sheet, and concurrent noise.
The current car audio installation process, especially Hi-end level design, often pays great attention to the installation process, and the system layout of the boot box is beautiful. The charm of the amplifier is artistically demonstrated through superb craftsmanship. This is not just a pleasing quick thing, and the technical requirements are very strict.
Number of brand power amplifiers
In the increasingly mature automotive audio market in Shenzhen, it is impossible to meet the requirements of purely poor quality products, or products with good quality but single functional technology. In addition to a good sound quality assurance, a variety of functions are also essential, such as power amplifier, in addition to its own good power amplification function, but also have to combine effective protection circuit technology, improve power, ensure sound quality and high fidelity technology, and even have both advanced The frequency-dividing and timbre balancing circuit can improve the cost-effectiveness. It is particularly favored and respected by DIY (do-it-yourself) owners. Therefore, major car audio manufacturers conform to the market trend, and the design and development products are versatile and feature-controlled. With the goal of clarity, safety, and accuracy, here are some of the world-class power amplifier brands that have excellent performance in terms of sound quality, functionality, and installation.
Alpine (secondary title)
Alpine is a well-known Japanese manufacturer in the audio field. Its series of products have unique technologies and irresistible charms that other brands do not have. Its designs are mostly silver grey and grey ink, and their grades are good. Intrinsic technology, Alpine took the lead in designing the “V12” processing technology that is most suitable for 12V driving voltage. This technology is remarkable in that even under 12V voltage, the amplifier can still achieve maximum power and ensure perfect sound quality, instead of forcing a 14.4V power supply (general automotive power amplifiers need this voltage to maximize their performance, so their Performance should be discounted, but Alpine's V12 will be able to fully perform as long as 12V).
In addition, Alpine's Bass Engine circuit design uses output-input balanced split lines, with special order for large-capacity capacitors. It is admirable for its improved performance and uncompromising “revolutionary spirit”. The new Alpine amplifiers are Using the above technologies, there are even low-resistance technologies and high-current protection circuits that Alpine is proud of. This makes it possible for the power amplifiers to be fully utilized and effectively protected. New current flow circuit for smooth current. Side-by-side coiled De-De large-scale transformers are more robust and improve the system's power supply capacity, effectively reducing distortion, and have a high brand reputation.
Alpine Advanced Series (MRV Series) amplifier, two-channel such as MRV-1507, bridge RMS power up to 900W, peak 1500W above, amazing power. Four-channel representative MRV-F407, RMS60W × 4, using high-fidelity equipment.
Lai Fu (secondary title)
Rockford Fosqate claims that the king of car audios from the United States has designed and produced power amplifiers that have won awards in the successive International Automobile Audio League (IASCA). Its high current and low impedance patent "TRANS.NOVA" technology circuit is of superior quality.
Lai Fook Company is a founding member of IASCA. In order to ensure the good performance of its products, it established the Raffles Technical Training Institute (R.T.T.I) in 1980 to provide rigorous training to sales technicians. Therefore, when your Lai Foo audio system is completed, you can more comprehend its superior performance and good technical services.
Lai Fook products called the "bombers" of the power series such as power500a2, power800a2 are very powerful "bombers", the impedance can be as low as 0.11Ω, promote dozens of bass speakers, the sound quality is still very good. Its “TRANS.NOVA” circuit ensures the reproduction of the original sound; the efficient and safe NOMAD (non-multiplying advanced decision circuit) guarantees that the amplifier will not be damaged in the peak state. In addition, this remarkable performance also benefits from MEHSA's efficient cooling technology.
Lai Fu Sheng Sheng series PUNCH, the application of a large number of patented technology. "INDIGO" guarantees optimal output in any power state; "TOPAZ" eliminates ground loops and resolves noise. Representative models are Punch 400a2, power200a2, etc., built-in 12dB high and low frequency crossover function, is a very good power amplifier.
Fire Dragon (Subtitle)
Fire Dragon Car Audio Amplifier is a product designed and produced in Italy. Its sound is pure, regardless of listening to folk songs, or rock music, it is equally lamenting its extraordinary skill. Fire dragon power amplifier surface adhesion technology implements high-efficiency quality control, and the design implements the “small size to achieve high power content”, and its special circuit technology can eliminate uncomfortable switching noise. All amplifiers of the dragon can realize “multi-mode” connection, that is, under the premise of no need for an additional amplifier, stereo front left and right channels and mono subwoofer mode output can be realized at the same time (general power amplifier can only achieve two Among them, no need for an additional amplifier to achieve a wide sound field. The built-in electronic crossover network of the amplifier can freely select different crossover points between 80 or 120 Hz for Qualcomm HP. Of course, full pass can also be realized. Such as four-channel power amplifier DA-604 is the case. If you need more gameplay, then the DA-606 six-channel machine can meet you.
The dragon power amplifier also has an air-cooled DB series with a light blue hue. The efficient air-cooled design has a friendly, upscale feel. The DB-505 five-channel amplifier is the first choice for car audio AV amplifiers.
PPI (secondary title)
PPI is a fever-grade product from the United States. The shape is very sleek, aluminum cast shell, built-in efficient cooling fan, the circuit is advanced double-sided circuit design (circuit boards on both sides of the design of different circuits), the components are very high-end, the use of DSM surface welding technology (special electronic components welding Technology), separate components, machine pressure welding, built-in frequency divider, each frequency divider has an accurate frequency point. This is an indispensable favorite of fans, especially its Q-BASS boost bass, which makes it easier for you to enjoy bass.
The common high-power monster PC-1800.2, PC-21400.2, PC-21400 is rated at 1400W, even more than many large professional audio. The four channels have a PC-4400 of 60W x 4 and a PC-4200 of 40W x 4. Six-channel PC-6600 with Q-BASS function. Its price is comparable to that of the power amplifier, and its mellow tone and nuance are the outstanding characteristics of PPI products.
1, the frequency response capability (Power Band Width): frequency response range of 20Hz ~ 80KHz, and the speaker's frequency response from bass to treble corresponding requirements 20Hz ~ 20KHz range of response. As the "bottleneck" component of signal transmission, the amplifier requires a wider frequency response, such as 7Hz to 80KHz, to ensure the integrity of the signal.
2, Signal to Noise Ratio (Signal to Noise Ratio): This is the most direct reflection of the quality of the amplifier parameters, generally in the 80dB ratio above, high-quality products often reach more than 105dB, if you pursue pure sound quality, then this The value cannot be ignored.
3, distortion (THD): This can be combined with the amplifier two other important indicators "Rated Power" (Rms) and "Max Power" (Peak Power) discussed together. One amplifier operates at its Rms power and the distortion should be relatively small, typically in the range of 0.5% to 0.01%. Peak power or bridging, the signal may be deformed, clipping (incomplete signal) and other distortion, the distortion ratio will also increase, about 0.5% to 1% are normal. The smaller the distortion ratio, the better the acoustic effect, which is an important indicator of a power amplifier.
4, Input Sensitivity (Input Sensitivity): This is for different manufacturers, different brands of host, pre-level audio source and set the level of adjustment, range from 100mv ~ 4V or even higher, must match with the sound source when tuning.
5, Input impedance (Input Impedance): Generally require the amplifier input impedance is higher, the output impedance is lower, the higher the input impedance, can more effectively block all types of noise, the common value is 10KΩ or higher.
6, the load capacity (Load Impedance): home power amplifier is generally 8Ω / 4Ω two; car power in stereo when the 2Ω to 8Ω; bridge when the 4Ω to 8Ω. However, individual specially designed amplifiers can be as low as 0.1Ω in impedance and have extraordinary capabilities. At this time, a power amplifier can connect dozens of woofers together to create an ideal sound pressure level (sound pressure refers to the pressure generated by the sound on the human ear. It is a measure of the ability of a sound system because the higher the sound pressure, The higher the system requirements, the higher the domestic maximum record is 141.5dB and 176.5dB abroad. Just like the dozens of woofers in the car, the vans that can shake the glass all over, but in this situation, I'm afraid we can only see it in the sound competition.
7. Working voltage: Car audio works normally in the range of 10V-15V.
8, Damping coefficient (Damping Factor): This coefficient is calculated from the rated load (4Ω) output impedance, it is generally believed that: the smaller the output impedance, the higher the damping coefficient, the better the amplifier. In fact, high-quality amplifiers have a ratio of more than 50, and individual numbers even exceed 500. Although some experts think that the damping coefficient of about 50 is sufficient, judging by my personal experience, if the coefficient is high, the wire requirements can be relaxed. On the other hand, too high a coefficient can affect the tone, but it can help bass performance.
9. Slew Rate: The highest amplification stage of the power amplifier in a unit of time magnifies the strong signal excitation into high-voltage, high-current AC audio. The high-end models are more than 30V/us, and individual super 50V/us. The ratio is high, the conversion ability is good, the level and dynamics of the music, when combined with the speaker, the reproduction can be restored closer to the original sound.
Power amplifier and speaker matching
Power amplifiers and speakers are mainly matched with power and style.
Power collocation: If you are playing acoustics first and you want to DIY yourself and not want to fake the hands of others, I suggest the same Rms power. First, it is not easy to burst the horn, and it is not easy to burn the coil (power is not enough, it is easy to burn the horn coil). If it is a master and economically plentiful, it is worthwhile for the “big horse-drawn car” to use high-power amplifiers to promote the horns and pursue meticulous sounds.
Style collocation: Japan, the United States equipment, have consciously to compensate for low frequency, high frequency, the sound is often less than European product balance. Different tastes, the monarch himself appreciate it.
Power installation on the car
Many introductions must have made you realize the importance of power amplifiers for the entire audio system. Due to the "hard work" in the amplifier, it is very important to ensure that the amplifier is properly installed.
First of all, to install the amplifier in the car, in addition to considering the matching with the horn, the supply of electricity, including wire considerations, reasonable wiring, should pay attention in advance. When installing, all kinds of wire should avoid short circuit, it is best to install insulation, such as the increase of density board (this is a special wooden board, commonly used for speaker production, also known as wooden board), to avoid direct nailing on the body of iron sheet, and concurrent noise.
The current car audio installation process, especially Hi-end level design, often pays great attention to the installation process, and the system layout of the boot box is beautiful. The charm of the amplifier is artistically demonstrated through superb craftsmanship. This is not just a pleasing quick thing, and the technical requirements are very strict.
Number of brand power amplifiers
In the increasingly mature automotive audio market in Shenzhen, it is impossible to meet the requirements of purely poor quality products, or products with good quality but single functional technology. In addition to a good sound quality assurance, a variety of functions are also essential, such as power amplifier, in addition to its own good power amplification function, but also have to combine effective protection circuit technology, improve power, ensure sound quality and high fidelity technology, and even have both advanced The frequency-dividing and timbre balancing circuit can improve the cost-effectiveness. It is particularly favored and respected by DIY (do-it-yourself) owners. Therefore, major car audio manufacturers conform to the market trend, and the design and development products are versatile and feature-controlled. With the goal of clarity, safety, and accuracy, here are some of the world-class power amplifier brands that have excellent performance in terms of sound quality, functionality, and installation.
Alpine (secondary title)
Alpine is a well-known Japanese manufacturer in the audio field. Its series of products have unique technologies and irresistible charms that other brands do not have. Its designs are mostly silver grey and grey ink, and their grades are good. Intrinsic technology, Alpine took the lead in designing the “V12” processing technology that is most suitable for 12V driving voltage. This technology is remarkable in that even under 12V voltage, the amplifier can still achieve maximum power and ensure perfect sound quality, instead of forcing a 14.4V power supply (general automotive power amplifiers need this voltage to maximize their performance, so their Performance should be discounted, but Alpine's V12 will be able to fully perform as long as 12V).
In addition, Alpine's Bass Engine circuit design uses output-input balanced split lines, with special order for large-capacity capacitors. It is admirable for its improved performance and uncompromising “revolutionary spirit”. The new Alpine amplifiers are Using the above technologies, there are even low-resistance technologies and high-current protection circuits that Alpine is proud of. This makes it possible for the power amplifiers to be fully utilized and effectively protected. New current flow circuit for smooth current. Side-by-side coiled De-De large-scale transformers are more robust and improve the system's power supply capacity, effectively reducing distortion, and have a high brand reputation.
Alpine Advanced Series (MRV Series) amplifier, two-channel such as MRV-1507, bridge RMS power up to 900W, peak 1500W above, amazing power. Four-channel representative MRV-F407, RMS60W × 4, using high-fidelity equipment.
Lai Fu (secondary title)
Rockford Fosqate claims that the king of car audios from the United States has designed and produced power amplifiers that have won awards in the successive International Automobile Audio League (IASCA). Its high current and low impedance patent "TRANS.NOVA" technology circuit is of superior quality.
Lai Fook Company is a founding member of IASCA. In order to ensure the good performance of its products, it established the Raffles Technical Training Institute (R.T.T.I) in 1980 to provide rigorous training to sales technicians. Therefore, when your Lai Foo audio system is completed, you can more comprehend its superior performance and good technical services.
Lai Fook products called the "bombers" of the power series such as power500a2, power800a2 are very powerful "bombers", the impedance can be as low as 0.11Ω, promote dozens of bass speakers, the sound quality is still very good. Its “TRANS.NOVA” circuit ensures the reproduction of the original sound; the efficient and safe NOMAD (non-multiplying advanced decision circuit) guarantees that the amplifier will not be damaged in the peak state. In addition, this remarkable performance also benefits from MEHSA's efficient cooling technology.
Lai Fu Sheng Sheng series PUNCH, the application of a large number of patented technology. "INDIGO" guarantees optimal output in any power state; "TOPAZ" eliminates ground loops and resolves noise. Representative models are Punch 400a2, power200a2, etc., built-in 12dB high and low frequency crossover function, is a very good power amplifier.
Fire Dragon (Subtitle)
Fire Dragon Car Audio Amplifier is a product designed and produced in Italy. Its sound is pure, regardless of listening to folk songs, or rock music, it is equally lamenting its extraordinary skill. Fire dragon power amplifier surface adhesion technology implements high-efficiency quality control, and the design implements the “small size to achieve high power content”, and its special circuit technology can eliminate uncomfortable switching noise. All amplifiers of the dragon can realize “multi-mode” connection, that is, under the premise of no need for an additional amplifier, stereo front left and right channels and mono subwoofer mode output can be realized at the same time (general power amplifier can only achieve two Among them, no need for an additional amplifier to achieve a wide sound field. The built-in electronic crossover network of the amplifier can freely select different crossover points between 80 or 120 Hz for Qualcomm HP. Of course, full pass can also be realized. Such as four-channel power amplifier DA-604 is the case. If you need more gameplay, then the DA-606 six-channel machine can meet you.
The dragon power amplifier also has an air-cooled DB series with a light blue hue. The efficient air-cooled design has a friendly, upscale feel. The DB-505 five-channel amplifier is the first choice for car audio AV amplifiers.
PPI (secondary title)
PPI is a fever-grade product from the United States. The shape is very sleek, aluminum cast shell, built-in efficient cooling fan, the circuit is advanced double-sided circuit design (circuit boards on both sides of the design of different circuits), the components are very high-end, the use of DSM surface welding technology (special electronic components welding Technology), separate components, machine pressure welding, built-in frequency divider, each frequency divider has an accurate frequency point. This is an indispensable favorite of fans, especially its Q-BASS boost bass, which makes it easier for you to enjoy bass.
The common high-power monster PC-1800.2, PC-21400.2, PC-21400 is rated at 1400W, even more than many large professional audio. The four channels have a PC-4400 of 60W x 4 and a PC-4200 of 40W x 4. Six-channel PC-6600 with Q-BASS function. Its price is comparable to that of the power amplifier, and its mellow tone and nuance are the outstanding characteristics of PPI products.
