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»Cable selection for Audio systems

The effects of conductors on the cable, the selection of insulation material, why we use screning in the cable? The basic rules of choosing cables.


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Structual properties are playing a key role in audio system installations. We will mention about the components of the structure in this article.
A special procedure in the production of OFHC copper permits the alignment of its crystalline structure, allowing a natural direction in which electron flow is facilitaded. In this way, a particular direction of preferred signal transmission can be pre-imposed on the material itself, allowing improved transmission in that direction.
The cable will obviously, work in the opposite direction, but with perceptibly diminished performance. This is the reason for which there are arrows on the connectors of these cables, clearly indicating preferred direction of signal path for peak performance of the cable.
A related concept is tied to “Skin effect”, an electrical phenomenon that causes higher frequency alternations to be attenuated near the core of a conductor, and facilitated in the outer layers. Skin effect is therefore responsible for high-frequency loss across cables. The solution to the problem lies in the use of conductors with a reduced ratio of         cross-section area to circumference. This means, in practice, the use of extremely fine conductors despite their more limited current-flow capability.
Since fine conductors are problematic in this sense, we opted for the use of a disproportionately increased number of them in compensation, thus reversing a disadvantage with two resulting advantages: improved flexibility and shielding.
Regarding the first of these advantages, it should be considered that the increased number of fine conductors together equals the applicable current of a single, larger section conductor, but also allows a physical flexibility unobtainable with larger conductors.
One of the other advantages about these fine wires is to reduce the noise effects. Have you ever see a man remains motionless standing on stage?
Another important electrical characteristic of a cable is capacity. In practice, a cable can be considered a capacitor that, in series with the impedance or the signal source forms a low-pass fitler, and can significantly filter out the high end of an audio signal.
About cable screnning;
The use of these finer conductors alos permits a much finer, closer-knit braiding in the screen layer of the cables. This provides an unprecedented shielding aganist external EM interference. We mention electromagnetic interference because today’s stage and studio are typically a spaghetti plate, all of which and especially in the case of AC mains cables are surrounded by their own varying electro-magnetic fields that can induce hum and distorsion in nearby signal cables.
When all these factors come together, they cause a significant factors.

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It is not important what peole say to you. Every cable attenuates signals. It depends on users to prevent losses. If the installation is done properly, all negative effects will be prevented.
What is to be done then ? We will examine low capacitance values in instrumant cables, low resistance and enductance values for speaker cables.
Speaker cables have lower resistance values when the cross-section increases. Damping factor must be considered when choosing the crosssections, and we should avoid using small crosssections. Use the cables as short as possible.
For the guitar cables, when the frequency rises the signals start deforming after 5 meter. If you need to use long distance cables, you should use low impedence inverters.
Most of the microphones has low impedence values, It will be a good solution to use star-quad cables in special applications. So the cable is less sensitive to electromagnetic interferences.
One of the most important thing about system installation is to do grounding properly.

Please also pay attention to the connectors and connection of the connectors....