Monday, December 9, 2013

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Getting To Know The Frequency Response Spec Of Modern Wireless Loudspeakers

By Michelle Finger


Wireless loudspeaker companies typically show the frequency response of their goods that, unfortunately, doesn't automatically show you a lot regarding the quality of sound. You might not completely understand the way in which the frequency response is calculated. I'm going to discuss what exactly this specific term means. I hope you will be able to make a much more educated buying decision.

A set of wireless speakers are going to transmit and the reproduce an audio signal that is within the frequency response range. Typically a lower and upper frequency are shown, for instance 20 Hz - 20 kHz. This kind of specification suggests that the wireless loudspeakers are able to transmit and then reproduce music inside of this frequency range. You may be thinking the larger the frequency response the higher quality the wireless loudspeakers. That, on the other hand, may not always be. You have to check out the specs far more closely so that you can correctly interpret these.

A large frequency response doesn't imply the cordless speakers have good audio quality. As an example a set of cordless loudspeakers which has a frequency response between 30 Hz and 15 kHz might sound better than a different set having a response between 10 Hz and 30 kHz. Furthermore, every producer, it seems, implements a different method of specifying the lowest and highest frequency of their wireless loudspeakers. Normally, the frequency response displays the standard operating range of the wireless speakers. Within this range, the sound pressure level is largely constant. At the lower and upper cutoff frequencies the gain is going to decrease by at most 3 decibels. On the other hand, several makers push this standard to the limit and often will list an upper frequency where the cordless loudspeakers are going to barely produce a beep anymore. Also, merely examining these 2 numbers is not going to say a lot about the linearity of the frequency response. Ideally you should really attempt to get a frequency response diagram from the supplier. In this diagram, you will find how the wireless speakers behave inside the frequency response range. You may also discover any peaks or valleys the wireless loudspeakers could have. Also you can desire to ask for a phase response chart which also gives crucial clues regarding the sound quality.

Then again, the frequency response frequently is used to deceive customers by way of stretching out the frequency range a great deal past the range in which the cordless loudspeakers still function effectively and also hides the reality that the cordless speakers may not be linear. A full frequency response graph, however, will show whether there are any peaks and valleys and also show the way the frequency response is to be interpreted. Also you can want to request a phase response chart that also provides crucial clues concerning the quality of sound.

The frequency response of Class-D amplifiers shows the greatest change with various speaker loads because of the built-in lowpass filter which removes switching noise from the speaker amplifier's signal. The lowpass filter characteristic, however, greatly depends upon the attached speaker load.

Some of the most recent digital amps feed back the audio signal following the lowpass filter in order to compensate for this drawback and to make the frequency response of the amplifier independent of the attached driver load. However, if the amplifier is not constructed properly, this kind of feedback can cause instability and also result in loud noise being generated by the amp if specific speakers are connected. Other amplifiers make use of transformers and offer outputs for different loudspeaker loads. In addition to enhancing the frequency response of the amp, this technique normally additionally improves the amplifier efficiency.




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