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
24-hour one-stop service
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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.
1. The role and impact of the power amplifier The power amplifier is the core component of the subwoofer system. Its main function is to amplify the input audio signal to a sufficient power level to drive the subwoofer to work. The performance of the power amplifier directly affects the output effect and sound quality of the subwoofer. For example:Insufficient power: If the output power of the power amplifier is lower than the actual demand of the subwoofer, it may cause the subwoofer to fail to perform at its maximum performance, poor sound quality, and even distortion.Excessive power: If the output power of the power amplifier is much higher than the actual demand of the subwoofer, it may cause power waste, increase power consumption and heat, and may damage the speaker unit. 2. Selection of power range Choosing the right power range is crucial to optimizing sound quality:Rated power and peak power: Subwoofers are usually marked with rated power and peak power. Rated power refers to the maximum power that the speaker can withstand for a long time, while peak power refers to the maximum power that can be withstand in a short time. When selecting a power amplifier, ensure that its output power is within the rated power range and leave a certain margin to avoid overload.Matching: The output power of the power amplifier should match the rated power of the subwoofer. 3. Specific impact of power output on sound qualityThe impact of power output on sound quality is mainly reflected in the following aspects:Low-frequency response: Appropriate power output can improve the low-frequency response capability of the subwoofer, making the bass deeper and more shocking. For example, a high-performance amplifier module can make the low-frequency output smoother by correcting the frequency response and phase parameters.Distortion and sound quality: Excessive power output may increase the nonlinear distortion of the speaker unit, thereby affecting the sound quality. For example, high power output may cause the speaker diaphragm to deform, resulting in distortion.Resonance and noise: Excessive power may also cause resonance inside the speaker or noise interference from the external environment, further affecting the sound quality.
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.
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+86-574-87787735
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Xiyun Road, Xiepu, Zhenhai, Ningbo, Zhejiang, China
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