Monday 6 January 2014

Unique Content Article on speakers,internet,computers,hardware,music,tv set,radio,technology,shopping,product reviews

Exactly How Are Wireless Surround Loudspeaker Products Powered?


by Mike Heller


The majority of people attach all of the home theater speakers to their home theater receiver by acquiring lengthy speaker cords. Some people, however, work with cordless surround sound products in order to eradicate at the very least the lengthy loudspeaker cord between the AV receiver and rear speakers. After that, I will look at the power supplies that provide these kinds of cordless sets with energy plus discuss several of the most important prerequisites that these kinds of power supplies must meet.

Both the transmitter as well as receiver that are part of the cordless product demand power and consequently need to be attached to a power outlet. Many products come with an exterior AC adapter while some others have a built-in power source. Both choices have pluses and minuses.

By using a ac adapter, the wireless receiver can be significantly smaller in dimensions. Another type of AC adapter has an IEC type power jack. This connector attaches to a mains wall socket by employing a cord. These types of wallwarts are quite similar to those utilized by notebook computers. Bundling a separate ac adapter is rather practical from the maker's point of view because regardless which region the system is sold to, a country-specific ac adapter will be included. Secondly, ac adapters are simpler and significantly less costly to safety approve compared to complete products. Additionally, in case a power supply becomes faulty, it really is less difficult and less expensive to exchange only the power supply rather than the whole item. Wireless surround amps that have integrated power source are easier to set up as they directly plug into a mains electric outlet. Having said that, they are normally a little more bulky.

Next, I will discuss which requirements the power supply has to meet. Safety factors are key. Hence, the power source should conform to the safety requirements that relate to each and every region that the system is marketed in. The rules were made to make sure that there's enough safety to prevent harm to humans in the case of line fault conditions. The insulating material from the mains voltage should satisfy rigorous prerequisites. Also, the power source should never overheat during typical operation and have enough protection just in case of an overload. Power sources that have passed safety screening typically have a UL or CE symbol. If the power supply is integrated into the cordless receiver then the receiver carries this logo.

The cordless receiver contains a high-frequency radio which receives the wireless signal and a power sound amplifier that amplifies the audio signal. These components require power. As a result the power source should be able to meet the voltage along with current requirements of these parts. The current prerequisite of the power supply mainly is dependent upon the music amplifier RMS power specification and efficiency. The lower the amplifier energy efficiency the greater the current that the power supply has got to supply. To be able to satisfy the wattage rating, the power supply is required to supply adequate current to the amplifier to be able to continuously supply the specified wattage for around 10 minutes. The power supply peak current specification is usually critical as normal music signals have brief bursts of large power. A different requirement would be that the power supply voltage must be pretty stable and have as little ripple and noise as possible. Various sound amplifiers are able to compensate for power source ripple and also noise. For minimal noise, linear power sources are perfect. This kind of power supply is used in many higher-end audio equipment. On the other hand, such a power source can be rather heavy dependent on the RMS wattage rating of the cordless receiver. The vast majority of power supplies are switch-mode power supplies. The supply voltages of the RF receive and power amp sections are usually different. Switched-mode power sources frequently offer various supply voltages and also have several protection mechanisms such as heat and overload protection.




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