Rabu, 20 Januari 2010


If the mixer can be thought of as the heart of a system, then the cable can be likened to veins. Poor quality of the cable will lower-quality audio for the entire system.

No one can dismiss how important function in a wired audio system. Various sound great company must have been very understanding about it.

A good instrument cable must be able to show a deep and soudstage high image, high resolution, detail, timbre is very super, natural tonal balance and very neutral. Ii cables not tonally colored, and can be compatible with many systems aplifier, speaker and pre-amp. We know a lot of conventional cable designs have a good look physically, but did not last long, because it uses a thin conductor. Lack of this type of cable umu is the weakness of image focus and resolution. Some of these cables is to combine the high resolution of informai, transparency and focus on the three-dimensional image with a neutral tonal balance and warm.

Construction of the cable
Here we will know the coaxial configuration (co-axial) and twin-axial. Coaxial, this configuration is used to unbalans instrument cable. Inside there is a conductor (conductor signal) the middle or center conductor. Charge or current carrying electrical signals from the source device (source) and divided by the insulation material that separates conductors were from other parts of dalm cable, ie shield (the shield). This shield is also a conductor, but a conductor of electric current or pengembali for melngkapi signal current into a circuit.
All three components were (conductor, insulation and shield) is equipped with two weapons, form an electrostatic shield which serves to reduce the level of noise handling. Then the protective outer / outer cable jacket to protect against the "outside world", and used to beautify the view cable.

Twin coaxial coaxial VS
Unlike a twin coaxial cable and coaxial, coaxial uses an isolated conductor in the middle to bring the voltage signal is the same as in the shield. Here the shield is connected to the contact "negative" from the plug at both ends, while the conductor in the middle of connecting contacts "negative". Since the analog audio signal is alternating current (alternate current), then volatse positive and negative signal change in bergonta center conductor and shield.

While twin coaxial cable (twin-ax) have two conductors insulated from the voltage signal which is surrounded by a separate shield. In this case, shield attached to one end of the cable and acts as a conductor "negative". Shield is designed to block incoming interference into the signal conductor with audio, as well as to bring interference (hnya) to the chassis ground of the device being used. Twin-ax design is generally more costly than coaxial. Especially during the cleaning process for the audio signal path, and to avoid any ground loops.

The relationship between the material inside the cable
Referring to the relationship between conductor and shield or a protective layer (read: shield). Different geometric characteristics will affect the electrical and shielding of a cable, which in turn affects the tmpilan sound. There are two approaches in terms of design that can be done to the overall geometrical instruments for cable, which is co-axial design and twin-axial.
Shield responsible for bringing half of the audio signal. So inevitably, this shield must be able to keep the conductor cable from the possibility of outside interference from the signal path devices (such as the amplifier or console), ie to the ground.

Conductor geometry
In a twin-ax design, the pattern of relations between the conductor and the shield will affect the electrical characteristics of a cable. To view cable, the most relevant characteristics associated with the two factors above are the capacitance and inductance. The effect of this capacitance can be heard clearly in an instrument cable. Capacitance is often measured in units dngan Pico farad per foot of a cable. Of the two conductors in a dipararelkan cable, this cable will have a relatively high inductance and low capacitance, and more able to pick up interference. Braid conductor types tend to show high capacitance with low inductance and more susceptible to noise.

In this instrument cables located beneath the outer jacket surrounding the conductor dn is usually a signal of a foil, Braid or a combination of both. A foil shild have a good power protection against high frequency interference, such as RFI (Radio Frequency Interference).
Braid Shield known more effective against all forms of interference which now exists, if the shield was in-woven with a sufficient density. Shield uses a lot of copper materials.
A spiral shield may have a higher density compared with braided shield, but less flexible than Braid. This spiral Shild can membka and provide a path for the interference, if the cable is too often bent or curve. Find the cable that wearing a braided shild (atai Braid and foil combination) with a coverage density of at least about 85%.

Have a direct impact on the flexibility of a cable, especially for heavy usage and the size of thin materials. A conductor beinsulas, actually have a character that does not turn it like a solid conductor. Kian thin insulation, more flexible cable.
There are criteria for electrical insulation thinness of this. Called "dielectric Strength", and is determined by the voltage level of the cable work. Existing voltage cable dalm use instruments generally very low, so the level of dielectric strength is needed to prevent the insulation does not drop very small.
There is one factor to consider, when the cable will be used for instruments like electric guitars, the amount of capacitance between the center conductor (center conductor) with a shield.
Regarding insulation materials, there are essentially four ingredients insolator we know for a conductor in an instrument cable. May be mentioned here, according to the order of appearance and a higher price, ie PVC, polypropylene, and Teflon polythylene. These materials can also be in "foam" or injected with air to minimize the bad effects of the signal, while the signal is stored or removed.
Insultasi Process Thermoplastic ekoomis known better, but needs to be careful in the production process. This is because the process can not foreplay excess heat (overheated), especially when isolating the conductor soldering.

Material conductor
Ah Copper (copper) is the material a very good conductor, though not all the copper has the same qualities as a conductor material. Copper is used in a cable of good quality, with levels ranging from free oxygen until the "7N". This type of copper purity levels vary in a later referred to as the percentage of copper. At the end of this spectrum is the copper "7N" which means "seven nine", after the decimal point in the value of purity, that is 99.9999999% pure.
While the materials used for the center conductor can be made from materials thermosets, the curry, neoprene, and hypalon. It could also be the nature of the thermoplastic materials, namely polyethylene, polypropylene, PVC, and FPE.
Silver or silver is also a good conductor, but in the subjective pebedaan silver made by the manufacturer, often larger than the difference in copper. Find the cable that uses a minimum of OFHC copper conductors, and try each cable using silver gilded copper conductor, before you buy.

Conductor design
Another source of distortion in the cable is the interaction that comes from the strands (strand) conductors in the cable. These strands are made in order to increase flexibility in the cable. But each piece in a bond will carry the same audio signal dngan next piece. Will be a problem, electrical currents berjlan dlam strands will form a magnetic field., Causing signal changes brought. So many pieces that dimilkiki by a conductor, will be the worse problems that arise.

Is an interesting factor in a cable. Capacitance is the ability of an electrical load. In an instrument cable, the capacitance between the center conductor and shield, expressed in units per foot (pF / ft). Where so low in value, it indicated the growing low capacitance as well. When combined with the source impedance, cable capacitance can form a low-pass filter between the instruments and amplifiers, which can cut the high frequencies level by cutting tone control instruments.
Given that the overall outside diameter of the cable is limited by the plug to be used, the capacitance of the cable is really a reflection of the size kombiasi conductors (power conductor), insulation material (cost), and the thinness of insulation (the size and flexibility). The term "dielectric constant" is often used here to see the quality of insulation materials. Of course this will ultimately determine the sound clarity.

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