Wireless speaker suppliers generally release the frequency response of their goods which, sad to say, does not necessarily explain to you a great deal concerning the audio quality. You may possibly not understand fully the way in which the frequency response is calculated. I am going to discuss what specifically this particular expression means. I hope you will be able to make a more knowledgeable purchasing decision.
The reality is, a set of wireless loudspeakers which has a frequency response from 10 Hz to 30 kHz can in fact have much worse audio quality than a set that offers a frequency response from 20 Hz to 15 kHz. Different suppliers seem to make use of various methods in order to define frequency response. The most commonly used way is to describe the frequency response as the frequency range within which the cordless loudspeakers have rather constant sound pressure level with a greatest drop of 3 decibel (dB). Commonly the drop in sound pressure level is greatest at the lower and upper frequency.
In fact, a set of cordless loudspeakers which has a frequency response from 10 Hz to 30 kHz might actually have much worse sound quality than a set that provides a frequency response from 20 Hz to 15 kHz. Different makers seem to employ various methods in order to define frequency response. The normal convention is to display the frequency range inside of which the sound pressure level of the speakers will drop a maximum of 3 dB from the nominal level.
The circumstances under which the frequency response was calculated are also important to comprehend. The fact is that numerous amplifiers which are incorporated into the cordless speakers will work in a different way with different loudspeaker loads. This is because that different speaker loads can cause changes to the behavior of the output power stage of the amplifier.
Typically modern wireless speakers which use digital or "Class-D" amplifiers can have changes in the frequency response with various driver loads. The main reason is the fact that Class-D amps employ switching FETs as the power stage which produce a great deal of switching components. These components are eliminated using a filter that is part of the internal speaker amp. The lowpass filter characteristic, however, heavily depends upon the connected speaker load.
A number of amp topologies provide a mechanism to compensate for variations in the amplifier gain with various speaker loads. One example of these methods uses feedback. The amplifier output signal following the interior lowpass is input to the amplifier input for comparison. If not designed adequately, this technique may cause instability of the amp though. An additional method is to provide specific outputs for various speaker driver impedances that are connected to the amplifier power phase by using audio transformers.
The reality is, a set of wireless loudspeakers which has a frequency response from 10 Hz to 30 kHz can in fact have much worse audio quality than a set that offers a frequency response from 20 Hz to 15 kHz. Different suppliers seem to make use of various methods in order to define frequency response. The most commonly used way is to describe the frequency response as the frequency range within which the cordless loudspeakers have rather constant sound pressure level with a greatest drop of 3 decibel (dB). Commonly the drop in sound pressure level is greatest at the lower and upper frequency.
In fact, a set of cordless loudspeakers which has a frequency response from 10 Hz to 30 kHz might actually have much worse sound quality than a set that provides a frequency response from 20 Hz to 15 kHz. Different makers seem to employ various methods in order to define frequency response. The normal convention is to display the frequency range inside of which the sound pressure level of the speakers will drop a maximum of 3 dB from the nominal level.
The circumstances under which the frequency response was calculated are also important to comprehend. The fact is that numerous amplifiers which are incorporated into the cordless speakers will work in a different way with different loudspeaker loads. This is because that different speaker loads can cause changes to the behavior of the output power stage of the amplifier.
Typically modern wireless speakers which use digital or "Class-D" amplifiers can have changes in the frequency response with various driver loads. The main reason is the fact that Class-D amps employ switching FETs as the power stage which produce a great deal of switching components. These components are eliminated using a filter that is part of the internal speaker amp. The lowpass filter characteristic, however, heavily depends upon the connected speaker load.
A number of amp topologies provide a mechanism to compensate for variations in the amplifier gain with various speaker loads. One example of these methods uses feedback. The amplifier output signal following the interior lowpass is input to the amplifier input for comparison. If not designed adequately, this technique may cause instability of the amp though. An additional method is to provide specific outputs for various speaker driver impedances that are connected to the amplifier power phase by using audio transformers.
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