Wireless Surround Sound Kits Investigated

By Mike Heller


A lot of people wire virtually all of the home cinema loudspeakers to their home theater receiver through getting lengthy loudspeaker cables. Other people, then again, work with wireless surround sound systems to do away with at the very least the lengthy loudspeaker cable between their Home theater receiver and rear speakers. A number of companies are selling cordless speaker sets that are able to turn virtually any kind of loudspeaker into a wireless loudspeaker. The wireless receiver of these types of systems comes with an audio power amplifier which must be powered. The power supplies for the wireless receiver should satisfy particular prerequisites. Within this editorial, I am going to emphasize several of the most important prerequisites.

Cordless surround sound sets come with a transmitter unit that attaches to a home theater receiver and one or more cordless receiver parts. Even though these kits get rid of the dreaded speaker cable, they are certainly not really wireless since both the transmitter plus receiver must be powered. Several cordless receiver devices have got an built-in power source and attach to a mains electric outlet by means of a cord and some come with an exterior wallwart.

By using a wallwart, the wireless receiver can be significantly smaller in size. Another type of wallwart is rather similar to the type used by laptop computers for the reason that it connects to a mains outlet by using a short power cord. From the viewpoint of a manufacturer, combining a wallwart has a few advantages over a built-in power source. First of all, depending on what region the cordless kit will be shipped to, a unique wallwart will be bundled which is compatible with the native mains voltage and power plug. Additionally, standalone wallwarts are less costly to get accredited regarding safety and in addition are less costly to change in the event they become faulty compared to changing the complete receiver. If the power supply is incorporated into the cordless receiver, the product will turn out to be a bit more bulky. But, the cord of the receiver may be directly plugged into an outlet. As a result the installation gets a bit less complicated.

Now, I am going to talk about what prerequisites the power supply should meet. Safety factors are crucial. Therefore, the power supply should comply with the safety standards which apply to each and every region that the product is offered in. Safety legislation are created to safeguard an individual from being injured when employing the products and covers ares like galvanic insulation between the output and input. Another aspect included in most safety standards is the behavior of the power supply during normal function. There are requirements regarding how warm the power source could become plus how well it'll safeguard itself in case there are overload or over-temperature conditions.

The wireless receiver incorporates a high-frequency radio that picks up the cordless signal along with a power sound amp that amplifies the music signal. Those two components require power. As a result the power source has to be in a position to meet the voltage and also current prerequisites of these two components. The power amplifier is needed to drive the loudspeaker which is attached to the cordless receiver. Most power supplies for music amps are designed to supply a continuous current adequate for the amp to satisfy the RMS specification for 10 minutes before overheating. The power source peak current specification is usually critical as typical audio signals have brief peaks of large energy. Yet another requirement is that the power source voltage should be quite stable plus contain as little ripple and noise as it possibly can. A few music amps can compensate for power source ripple and noise. A number of high-end music gear makes use of linear power supplies irrespective of their weight and dimensions due to the excellent noise behavior. Undoubtedly a majority of modern consumer products make use of switched-mode power supplies because of their small size. Generally the interior components require several supply voltages. Generally you will find a few voltages provided by the power supply to supply the individual parts. For safety reasons, power sources typically also have got numerous defense techniques. The most common kinds of protection are overload / short-circuit protection plus over-temperature protection.




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