Many people are not aware of the existence of electromagnetic interference. The sources of natural electromagnetic interference are electrical discharges, dust and sand storms, precipitation and the cosmic radiation from either inside or outside the Solar System. Industrial interference comes from an electrical power grid, ignition systems, whirling machines, radio and TV receivers, power amplifiers, strip lightening, computers and from all kinds of transmitters. Interference can be emitted directly out of those devices in the form of an electromagnetic wave or it can penetrate a power grid.
The following filters were designed to be used with audio devices. The difference in electric properties of conductors resulted in the development of a unique filter for each group of cables.
The screening of the highly sensitive circuits and the accurate filtration of voltage are the basic methods of prevention against hum, noise and power grid interference. We are proud to present our four unique filters:
DFSS – Double Filtering Signal System
TFCT – Two Filters Current Tension
PFSS – Powder Filtering Signal System
DSS – Double Screen System
A DFSS filter is the combination of capacity, ripple and induction filters. The task of the filter is to reduce a variable component in a voltage circuit and to move an input voltage closer to a fixed circuit. Filters use properties of inductive elements, which allows for an energy accumulation. The double-filter system consists of two ferromagnets. A precisely fixed space between them is separated by aluminium and Teflon and as a result lossless signal can be delivered. The key features are the composition of ferromagnets, their size, precisely fixed space between them and a distance to a plug. Moreover, the important part of the construction is ‘the divider’, which in this case is made of Teflon-and-PVC-covered aluminium tape.
TFCT – At the turn of the last decade, an enormous increase in the application of electronic systems is observed in almost all industries so our sensitive audio systems need to be prevented from external interference. This was an incentive for our company to design a unique anti-interference power filter which minimises or even eliminates external interference and guarantee the proper work of electronic devices. In combination with an excellent-screened power cord, the filter converts into a power conditioner. The attenuation of electromagnetic interference in filtering systems is carried out in two directions. Capacitors collect interference from earth, while arranged in series power line reactors increase the impedance of a line, which increases the effectiveness of bypass capacitors. The filter is made on a printed circuit board with the application of the highest quality materials which comply with the RoHS directive.
PFSS – This is the filtration system in which toroidal cores from powder iron are applied in DTP and DTSP chunks. Powder cores belong to the group of magnetic attenuators. Among the group, the cores made of iron powder and alloy powder should be singled out. Their main feature is the high value of saturation induction (1-1,5T), which allows electric currents going through windings to achieve higher value than by the employment of ferrite materials. Material from which the cores are made shows high initial permittivity. As a result, the cores enable to build an anti-interference choke, which stores impulse energy and is called an air gap choke. The applied materials and the appropriate placement of the core allow for the modelling of such cable property as inductivity, which is very useful in designing and controlling high quality audio cables.
DSS screening system – minimises the interference caused by an external electromagnetic or radio field. The DSS system applies the exceptional weave of the multiconductor cable which eliminates interference by neutralizing the mutual electric current induction through the magnetic field generated by neighbouring wires. The task of the DSS system is to deliver the purest signal that has been previously filtered by TFCT, DFSS and PFSS to a device.
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