All speakers of PD use self-developed and produced electroacoustic transducers, and have intellectual property rights in the molds and design of all components involved in the units.
Compression driver: One of the key factors in the manufacturing of compression drivers is accuracy. PD has a design patent that can eliminate tolerance accumulation, eliminating the need to use washers to adjust the distance between the diaphragm and throat plug like its Italian counterparts, greatly improving consistency and increasing production efficiency. Through advanced FEA finite element simulation analysis, it is found that when the size of the spherical top shaped diaphragm is small, such as below 44mm, the vibration mode of the diaphragm is still good. However, when its size is large, severe segmented vibration will occur in the high-frequency range, resulting in a sharp reduction in radiation area and staggered peaks and valleys. This not only reduces radiation efficiency, but also deteriorates sound quality. The design philosophy of Pindi is to use spherical top shaped diaphragms for small sizes, while circular diaphragms are always used for large sizes, greatly improving radiation efficiency and optimizing sound quality, greatly increasing the operating limit of the driver. Compared with the famous Italian compression driver, Pindi's self-designed compression driver not only has better manufacturing and sound quality, but also has no inferior reliability.
PD has stopped the research and development of analog power amplifier products. The future of power amplifiers belongs to digital power amplifiers, which lead the future trend of high efficiency, environmental protection, and lightweight. Currently, the efficiency of PD's DA series power amplifiers is generally around 90%, which is more than twice the efficiency of traditional power amplifiers, which are less than 40%. Combined with well-designed and well protected switching power supplies, not only is it full of energy, but it also works stably. The advantage of switching power supplies is not only light, because it is easier to achieve stable voltage than traditional transformer power supplies. In areas with unstable voltage, the output power of analog power amplifiers will be significantly reduced due to the decrease in input voltage. For example, when the input voltage is 90% of the rated voltage, the output power is only 90% of the rated voltage. 81% of the power (0.9x0.9=0.81), and when the power supply voltage drops to 80% of the rated voltage, The output power is only 64% of the rated power (0.8x0.8=0.64), because traditional power transformers have a linear relationship between input voltage and input voltage. The switch mode power supply designed by Pindi with a voltage stabilizing circuit fluctuates within 98% of the rated power when the voltage changes within the above range. Almost unaffected. PD is developing a class D amplifier based on gallium nitride, which will increase the efficiency of the amplifier from 88-90% to 95-97%, greatly improving the thermal stability and reducing weight of the amplifier.
Electroacoustic sound reinforcement must be the coordinated work of the entire system. Therefore, optimizing the design of sound sources, DSP, power amplifiers, speakers, and even speaker units from a system perspective has always been the core concept that runs through our product development. Whether it is the popular linear cylindrical wave sound source design that is more suitable for long-distance transmission or the point sound source design with better sound quality, we have our own core technology. In terms of advantages and disadvantages, the advantages of cylindrical wave line sound source design are high sound pressure at a long range, but the disadvantages are complex installation and debugging. The sound quality on site largely depends on the level of installation and debugging. The advantage of point sound sources is that they are easy to install and debug. Generally, the installation and debugging time is less than one-third of that of linear sound sources, and there is no need for additional adjustments. Basically, the sound quality reaches the design level after being connected. However, the disadvantage is that the range is relatively close. Therefore, we do not produce small linear array systems. Compared to point sound sources, small linear arrays have no advantages, but the transmission distance of medium and large linear array systems cannot be replaced by point sound sources. The point sound source design of Pindi is all high-efficiency horn loading design, with sensitivity generally above 105dB, and can easily output sound pressure above 130dB without requiring a large power. This design is not only more energy-efficient, but also greatly reduces the weight and volume of the amplifier for small mobile performances. If combined with D-class amplifiers, transportation, installation and handling are all very easy. Our DSP technology ensures that both the amplifier and speaker operate at their optimal state, without distortion or damage even when outputting maximum sound pressure.
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