![]() This obviously can cause an alteration of the signal, which is modulated by this variable capacitance. If the capacitor structure is not rigid enough, these varying forces can modify the geometry of the capacitor, and as a consequence its capacitance! The film is subject to varying internal electromagnetic forces due to the charging and discharging of the capacitor. For example, the mechanical structure of a capacitor is rather simple: often it is just a piece of metallized film rolled up. There might be a lot of different causes. At the same time the high frequency energy seems to be reflected and dispersed in an innatural glare that saturates mid frequencies making them dazzling and confused.įrom the technical point of view I am tented to track it to a loss in the high frequency range, but as a matter of fact if you listen to each component of the sound it's high frequencies appear not attenuated at all instead looking at the entire picture you feel the lack of real life detail, of air between the instruments. This veil has - IMHO - also the effect of making the image flatter, dead, feeling like you're listening to a reproduction instead of live music. If a problem occours, it is like listening to the music through a curtain: the message misses detail, precision, depth. A very transparent system tends to disappear: you hear the flow of music direct from the playing instrument. This means that in a real circuit a real capacitor will have a behaviour which only roughly approximates its model, and where you should expect a perfectly flat frequency response, there are very subtle ondulations or phase anomalies that can be perceived by the ear.Ĭolouration consists in the fact that the reproduction seems to favour some frequency, typically in the medium frequencies range, so that the musical message seems biased towards this frequencies, and often becomes dull and repetitive.Īnother problem is transparency. The value of the capacitance of any capacitor is not constant with frequency moreover there is a resistive component and, what's worse, an inductive component, because of leads and physical dimensions of the body, both variable with frequency. In my opinion there are two or three basic sonic problems. Which are the nasties that affect capacitors sound, at such an extent that any designer tries to get rid of them wherever possible? This has nothing to do with the sound, but the look is always important. Even the body of the capacitor, yellow, with green side surfaces, is very attractive. Sceptical about it? I was too, so I tested the capacitors in both directions, and I must admit that they seemed to sound best in the suggested configuration.Ī very high quality presentation indeed. Finally, if the capacitor is used in loudspeakers crossovers, the red lead should be toward the + terminal and the black one towards the - one. If the capacitor is used as power supply bypass unit, the black lead should be connected to ground and the red one to the + or - voltage. If the capacitor is used in the signal path the signal must enter through the black lead and get out through the red one. The capacitor are axial models with flexible, insulated, multistrand leads coming out of each side. In fact, as the most refined of us require special cares, even these capacitors have a peculiar attitude, as it seems. The capacitor arrived in a small box, packed in a plastic bag containing mounting instructions. Also, it required a short time to be available and any change took seconds. Not a typical use? Yes, but as I just have to compare different capacitors, all of them would have been absolutely in the very same situation, and therefore this For the sake of simplicity I decided to mount a selector and the capacitors under test on a Experimentor insertion board, with input and output pins so that it was possible to insert the capacitor in my current rig in series to the signal between the CD player and the pre-amp. To make it not easy at all for our DUT, I selected a couple of other high quality polypropilene capacitors and also a NOS paper in oil capactor. ![]() On one end the task appeared to be not so simple and straightforward and on the other end Auricaps are used by several well known OEMs in the audio business.įirst I had to choose a set of comparable capacitors in my junk box. ![]() So when I was asked to review some samples of Auricap capacitors by Audience, I was really interested and thrilled. Normally what's published is just nothing more than a press note. Anyway, probably because of the delicate situation, I have not seen hardly any review or comparison test published on the topic. Product: Auricap - Premium Audio Capacitor - 0.47uF +-10% 450V EGA 7956-35Ĭapacitors sound is an old problem in audio. Audience Auricap Auricap Film capacitors A very personal listening test
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