Friday, November 29, 2013

Where Do Wireless Surround Sound Speaker Models Obtain Their Energy?

By Mike Heller


You can find numerous options available for putting in rear home theater speakers including directly wiring your loudspeakers to your Surround receiver and using a wireless surround product to get rid of the speaker cable clutter. Next, I will look into the power sources that provide those cordless sets with power and explain some of the most significant prerequisites which these kinds of power supplies must satisfy.

Both the transmitter and receiver that are part of the cordless package require power and thus need to be attached to a power outlet. You will find different choices which provide the cordless receiver with power. One particular of these choices is to work with an external AC adapter or wallwart that connects to a mains wall socket. An alternative choice would be to use a power supply which is entirely incorporated into the cordless receiver.

One advantage of a wallwart is that the receiver by itself can be small sized. Almost all AC adapters are direct-plug-in types. One more type of wallwart is very similar to the type utilized by notebooks as it attaches to a mains wall socket via a short cord. From the viewpoint of a producer, combining a ac adapter has numerous advantages over an integrated power supply. For starters, based on which region the wireless product is going to be sold in, a different wallwart will be bundled which is compatible with the native mains voltage and power plug. Next, wallwarts are simpler and much less expensive to safety approve compared to complete systems. Additionally, when a power supply becomes faulty, it is simpler as well as less expensive to change just the power supply compared to the complete unit. Cordless receivers that incorporate the power source are typically larger than units with an external supply though are easier to put in.

The power supply needs to meet the local safety legislation together with a few other prerequisites. You can find several safety criteria in various nations. On the other hand, these requirements were created with the safety of the consumer in mind. One aspect covered in virtually all regulations is how effectively the consumer is insulated from likely electric shock. Also, the power source mustn't get too hot during normal operation and have ample protection in case of an overload. Power supplies which have passed safety assessments commonly bear a UL or CE logo. When the power source is built-in into the wireless receiver then the receiver carries the symbol.

The power supply needs to supply enough energy for the RF receiver and power amplifier component. The RF receiver section decodes the cordless audio signal. The power amp is required to drive the loudspeaker which is connected to the wireless receiver. All power sources for audio amplifiers are designed to supply a constant current adequate for the amplifier to meet the RMS specification for 10 minutes prior to overheating. The power source top current rating is likewise critical given that regular audio signals have brief bursts of large energy. The sound performance of the cordless receiver also is determined by how clean the power is which is provided by the power supply. A large amount of voltage noise and ripple can trigger the audio performance to diminish. Therefore voltage noise plus ripple are a few additional critical prerequisites. Linear power sources normally have the smallest amount of noise. However, linear supplies are rather heavy and also bulky. Virtually all power sources are switch-mode power sources. The supply voltages of the RF receive and power amplifier section usually are different. Switched-mode power supplies generally supply various supply voltages and possess various protection mechanisms just like heat and also overload protection.




About the Author:



No comments:

Post a Comment