Monday, January 9, 2012

Advice for purchasing cordless surround sound loudspeakers

By Gunter Fellbaum


You may well be overwhelmed by the amount of wireless speakers now available. I'll help reduce your selection by taking a quick look at a number of the important specifications that have a big effect on sound quality and speaker overall performance.

If you would like set up wireless surround sound speakers you may want to consider cordless loudspeakers to avoid rewiring your house.

However, it usually is tricky to select a suitable product considering the great number of products now available.

When you have a huge space then you might need to purchase a speaker having a high power in order for the loudspeaker to get sufficiently loud.

Loudspeaker wattage is given either as RMS power which tells how much wattage the loudspeaker amp can sustain constantly as well as maximum wattage that shows the level of wattage the amplifier can endure for short amounts of time.

Having said that, bear in mind that music signals contain big surges in output power so be certain there is ample headroom in the loudspeaker wattage spec to eliminate audio compression at short music peaks.

Another important parameter is the frequency response that shows over which frequency range the speaker may reproduce sound even though it is best to take a look at the complete frequency response chart when you compare speakers.

The total-harmonic-distortion expression, often called THD, indicates how much the audio is going to be altered by the internal music amplifier and also transducers. Be certain you compare the output wattage at which the harmonic distortion is shown. Preferably you'll find harmonic distortion numbers for several power figures As soon as the sound amplifier is driven to its greatest wattage, audio distortion will increase significantly as a direct consequence of clipping of the sound signal. Speaker sound distortion will also depend upon the quality of the drivers

Speakers with larger power rating usually have digital amps that offer greater power effectiveness than traditional power amps. Getting a model having a higher-efficiency amp is usually lightweight since it doesn't need heavy cooling fans and will save you money on electrical power. Digital amplifiers often times have larger harmonic distortion than analogue amps. This distortion is in part the result of the switching FET stage of the amplifier.

Cordless loudspeakers with multiple drivers need some kind of crossover. This cross-over is often built with passive components. A number of types incorporate individual amplifiers for every driver.

It is recommended to choose a product that includes a good-quality cordless receiver. Entry-level loudspeakers with 900 MHz analogue receivers are going to create a great deal of noise and also music distortion during the cordless transmission. Newer products use digital music transmission and offer you enhanced levels of signal-to-noise ratio and fidelity over previous-generation models.

Cordless speakers which use digital transmission either receive uncompressed music or use a standard just like Bluetooth which compresses music to some extent. Bluetooth music transmitters make use of music compression and generally cannot broadcast to more than one loudspeaker but provide the advantage of not requiring a dedicated transmitter.




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