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. Distortion (THD/THD+N)Total harmonic distortion (THD): The sound system amplifier will generate harmonics (such as 2f, 3f, etc.) outside the original signal due to nonlinear elements (such as transistors), resulting in a "burr" sound. Impact --When THD>0.1%, the human ear can perceive distortion, such as hoarseness of the human voice and loss of overtones of musical instruments; high-end Hi-Fi amplifiers need THD <0.01%.THD+N (Total Harmonic Distortion + Noise): The circuit background noise is superimposed, which more truly reflects the actual listening experience. For example, THD+N may soar at high gain, resulting in an unclean background. 2. Signal-to-noise ratio (SNR): Determines the purity of the backgroundDefinition: The power ratio of the useful signal to the background noise (unit: dB).Impact --SNR < 90dB: Noise (such as "rustling") can be heard in quiet passages, and dynamic compression;SNR > 110dB: The background is like a "black curtain", and the details of weak sounds are clear (such as breathing and bow rubbing strings).Optimization direction: Power supply filtering and low-noise components (such as JFET input stage) can improve SNR. 3. Output power and dynamic rangeRated power: It is necessary to match the speaker sensitivity (such as 84dB speakers need > 50W, 90dB only needs 20W), avoid under-pushing (weak sound) or overload (burning the speaker). 4. Other factorsPower supply rejection ratio (PSRR): Suppress power supply ripple interference, PSRR > 80dB can avoid "hum".Transient response (Slew Rate): The rate of voltage change per unit time (V/μs). When <10V/μs, high-frequency transient distortion occurs (such as the cymbal's cracking becomes dull).Temperature stability: Class A amplifiers drift at high temperatures, causing crossover distortion (intermediate frequency breakage).
The DSP24/DSP25 Series Active Speaker Amplifier is an advanced audio device that integrates digital signal processing (DSP) and power amplification. It provides precise audio control and high-efficiency output for professional audio systems through intelligent algorithms and high-precision hardware architecture. This series of products is mainly aimed at scenarios such as line array speakers and performance systems, and achieves optimization from sound source processing to power drive through modular design. On the technical level, the DSP24/DSP25 series uses ARM processors and AD/DA converters to support high-fidelity signal processing with 24-bit depth and 96kHz sampling rate. The input channel is equipped with noise gate, gain control, phase correction and 31-band parametric equalization, while the output channel integrates crossover, compressor, delay controller and 10-band parametric equalization. The crossover point can be freely adjusted in the full frequency band and supports multiple filter types. The power amplifier module of the product adopts Class D digital amplifier technology, with a single-channel output of up to 800W (8Ω load), and with an ultra-low distortion PWM modulator, the damping coefficient exceeds 350, ensuring a clean and powerful low-frequency response. Its dual feedback design not only improves energy efficiency (peak efficiency > 90%), but also ensures equipment stability through multiple protection mechanisms such as temperature, overload, and DC. For complex acoustic environments, its compressor can dynamically adjust the attack/release time to prevent transient signal overload, and the delay controller supports a 25ms adjustment range, effectively solving the sound field synchronization problem of multi-channel systems.
1. High efficiency and energy savingClass H Loudspeaker Amplifier dynamically adjusts the power supply voltage by monitoring the input signal amplitude in real time. For example, low voltage is used for power supply when the signal is low, and high voltage is switched to when the signal peak is high, which greatly reduces static power consumption. Its efficiency can reach 70%-90%, which is much higher than Class AB (about 50%-65%) and Class A (about 20-30%), and close to Class D level. Class G requires multiple sets of fixed power supplies to achieve voltage switching, while Class H reduces system complexity through continuously adjustable power supplies, reducing the cost and volume problems caused by multiple power supplies. The output stage transistor voltage drop of Class H amplifier is minimized, avoiding the energy waste of Class AB amplifier at low power. 2. Sound quality and linearityClass H Loudspeaker Amplifier inherits the linear amplification principle of Class AB and eliminates crossover distortion through dynamic bias technology. Class D is prone to high-frequency noise and EMI interference due to switching modulation, while Class H can achieve high-fidelity output without complex filtering. In music or theater systems, Class H can accurately handle instantaneous large dynamic signals and avoid the transient noise problem of Class D during high-voltage switching. 3. Heat dissipation and stabilityThe efficient operation of Class H Loudspeaker Amplifier reduces energy loss and has lower heat dissipation requirements than Class A and Class AB. At the same power, the volume of Class H heat sink can be reduced by 50%, which is suitable for compact equipment. Class G may generate local high temperature due to multiple power switching, while Class H optimizes heat distribution through continuous voltage regulation.
Phone
+86-18815298889
Tel
+86-574-87781767
Fax
+86-574-87787735
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Xiyun Road, Xiepu, Zhenhai, Ningbo, Zhejiang, China
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