We are a professional audio company integrating R&D, production and sales. We have been focusing on the production of mixers, active power amplifiers, microphones, and related electronic components and equipment for many years.
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Precipitation of more than 20 years of technical design
OEM / ODM /B2B
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We have a strong R & D team that can develop and produce products according to the drawings or samples provided by customers.
We have two own foundries and processing factories, factory direct sales, high quality and low price.
We have our own laboratory and advanced testing equipment in the industry to ensure product quality.
Based on the high-grade and high-end market, our products meet international standards and are mainly exported to Europe, America, Japan and other countries.
The working principle of Class H power amplifier module is mainly based on its efficient power management and dynamic voltage regulation technology, which can achieve a balance between high sound quality and low power consumption. 1. Complementary symmetrical circuit structureThe Class H power amplifier adopts a complementary symmetrical circuit structure, using a differential pair structure at the input end to amplify the positive and negative half-cycles of the signal, and using a common-emitter pair structure at the output end to superimpose the signal, thereby effectively suppressing nonlinear distortion and ensuring the quality of the output signal. This design makes the Class H power amplifier have small output waveform distortion and good linear characteristics when the input signal amplitude changes. 2. Dynamic power managementThe Class H power amplifier automatically switches the power supply voltage according to the amplitude change of the input signal by dynamically adjusting the output voltage. At low power output, a lower supply voltage is used to reduce power consumption; at high power output, it switches to a higher supply voltage to meet the demand. This dynamic power management technology significantly improves efficiency while reducing unnecessary power consumption and heat dissipation. 3. ±150V dual power supplyIn some Class H power amplifier circuits, the final amplifier uses a ±150V dual power supply. When the output power is low, positive and negative power supplies are used; when the output power is high, it automatically switches to only positive power supply. This design enables the output tube to operate in a high voltage and large dynamic range, thereby further improving efficiency and sound quality. 4. Low voltage threshold process technologyModern Class H amplifier modules usually use low voltage threshold process technology, which can smoothly convert the lowest power supply voltage to any discrete output voltage, thereby accurately matching the actual output requirements. This technology not only improves efficiency, but also saves additional power consumption. 5. Switching mode amplification technologyClass H amplifiers use "switching mode" amplification technology to cut the audio signal into multiple small fragments, each of which is amplified and output by a switch, and then recombined into a complete audio signal. This technology can effectively reduce distortion while improving efficiency. 6. Combination of high efficiency and low distortionClass H amplifiers combine the advantages of Class AB and Class D amplifiers: Class AB amplifiers provide smooth sound quality, while Class D amplifiers are characterized by high efficiency and low distortion. By dynamically adjusting the power supply voltage and using complementary symmetrical circuits, Class H amplifiers achieve efficient energy utilization while maintaining high sound quality.
1. Dynamically Adjusting the Supply VoltageThe core feature of a Class H power amplifier is that its supply voltage is dynamically adjusted based on the amplitude of the input signal. When the input signal amplitude is large, the supply voltage switches to a higher voltage rail; when the input signal amplitude is small, the supply voltage switches to a lower voltage rail. This dynamic adjustment reduces the power loss in the output transistors, thereby improving overall efficiency. 2. Working PrincipleClass H amplifiers usually use a single supply rail, but dynamically adjust the voltage of this supply rail to adapt to changes in the input signal. For example, when the instantaneous peak of the input signal exceeds a certain threshold, the supply voltage is increased; when the signal peak is below the threshold, the supply voltage is reduced.This dynamic adjustment mechanism is similar to the operation of Class D or Class B amplifiers, but the Class H design is more complex because it requires precise control of changes in the supply voltage. 3. ImplementationMulti-level supply voltage: Some Class H amplifiers use multiple discrete supply voltage levels to select the appropriate voltage rail based on the amplitude of the input signal.Continuously adjustable supply voltage: Other implementations continuously adjust the size of the supply voltage to adapt to changes in the input signal.Pulse Width Modulation (PWM) Technology: In some designs, the power supply voltage is modulated by PWM technology to achieve finer control. 4. Efficiency OptimizationDynamically adjusting the supply voltage can significantly reduce the power loss of the output transistor. For example, when the input signal amplitude is low, reducing the supply voltage can avoid unnecessary energy waste.In addition, Class H amplifiers can further improve efficiency by reducing the voltage drop at the output.
1. Built-in amplifier or notFull-range powered active speaker amplifier: It has a built-in power amplifier that can directly receive and amplify the audio signal and then drive the speaker to make sound. This design simplifies system connections, reduces dependence on external devices, and generally provides better sound quality and power output.Passive speaker amplifier: There is no built-in power amplifier, and an external power amplifier is required to provide the required audio signal amplification. This design is relatively more traditional and requires more external equipment support. 2. Performance and functionFull-range powered active speaker amplifier: It usually has higher power output and better sound quality performance. In addition, some high-end models also have a variety of audio processing functions, such as DSP (digital signal processing) technology, which is used to optimize sound quality and provide additional audio effects.Passive speaker amplifier: Although the performance may be slightly inferior to that of active speaker amplifiers, in some specific applications, such as when a highly customized audio system is required, passive speaker amplifiers may be more flexible. 3. Product parameter comparisonPower supply type: The full-range powered active speaker amplifier adopts LLC high-efficiency resonant power supply, which is usually designed with higher efficiency and lower power consumption. Passive speaker amplifiers rely on external power supply.Output power: The full-range powered active speaker amplifier has clear output power parameters, such as 500W/4Ω for low frequency and 200W/8Ω for high frequency, which indicates that it can provide enough power to drive the speaker to sound and meet the audio needs in different frequency ranges. The output power of the passive speaker amplifier depends on the connected external power amplifier.Operating voltage range: The full-range powered active speaker amplifier has a wide operating voltage range, such as 220-240 volts AC and 100-120 volts AC, which enables it to adapt to the voltage standards of different countries and regions. The operating voltage of the passive speaker amplifier depends on the connected external power amplifier. 4. Application scenariosFull-range powered active speaker amplifier: Due to its built-in amplifier and sound quality performance, it is often used in occasions requiring high-quality sound effects, such as concerts, theaters, recording studios, etc.Passive speaker amplifier: It is more suitable for audio systems that require high customization and flexible configuration, such as home theaters, professional recording studios, etc.
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