Film capacitor is a performance capacitor because it has many excellent characteristics.
Its main characteristics are as follows: non-polarity, very high insulation impedance, excellent frequency characteristics (wide frequency response), and very small dielectric losses.
Based on these advantages, so film capacitors are used a lot in analog circuits. Especially in the signal interconnection part, it is necessary to use capacitors with good frequency characteristics and very low dielectric loss to ensure that the signal is transmitted without too much distortion.
Among all the plastic film capacitors, polypropylene (PP) capacitors and polystyrene (PS) capacitors have the most significant characteristics, but of course the price of these two capacitors is also relatively high. However, in order to improve the sound quality of audio equipment, the materials used in the parts have become more and more advanced, and the price is not the most important consideration, so PP and PS capacitors are used in audio equipment more and more frequently and in higher quantities.
We can often see a certain brand of equipment, claiming to use a certain brand of PP quality capacitors or PS quality capacitors, in order to do the standard in the sound quality, the reason is here.
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非極性高電圧コンデンサ

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