The frequency response is quite possibly the most frequently found parameter in order to define cordless loudspeakers. Nevertheless, it can regularly be misleading and might not always offer a good indication of the sound quality. To help you make a more intelligent buying decision, I'll describe what this spec means and how to understand it. This ideally is going to guarantee you'll get the best wireless loudspeakers for your project.
Cordless loudspeakers are made to transmit and the reproduce a sound signal to moderate or large sound level. Suppliers typically present the frequency range over which the wireless loudspeakers operate. Usually a lower and upper frequency are listed, such as 20 Hz - 20 kHz. This kind of specification suggests that the wireless speakers will be able to transmit and then reproduce music inside this frequency range. However, there's far more to comprehending the cordless loudspeakers's overall performance than just reviewing these figures.
A large frequency response does not always mean the wireless loudspeakers offer great sound quality. For instance a set of cordless loudspeakers that has a frequency response between 30 Hz and 15 kHz may sound much better than a different set having a response between 10 Hz and 30 kHz. Moreover, every producer, it seems, implements a different technique for specifying the lowest and highest frequency of their cordless loudspeakers. The standard convention is to show the frequency range inside of which the sound pressure level of the loudspeakers will decrease at most 3 dB from the nominal level.
You also will want to look at the conditions under which the frequency response was measured. You normally will not find any specifics about the measurement conditions, unfortunately, in the maker's data sheet. The fact is that many amplifiers which are incorporated into the wireless loudspeakers are going to behave differently with different speaker loads. This is due to the fact that different speaker loads will cause changes to the behavior of the output power stage of the amplifier.
Mainly contemporary cordless loudspeakers 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 amplifiers make use of switching FETs as the power stage that produce a great deal of switching components. These components are eliminated with a filter which is part of the internal speaker amp. A changing loudspeaker driver load will impact the filter response to some extent. Commonly the lower the speaker driver impedance the lower the maximum frequency of the built-in amp. Furthermore, the linearity of the amplifier gain will be determined by the driver load.
A few of the latest digital amps feed back the music signal after the lowpass filter in order to compensate for this tradeoff and to make the frequency response of the amplifier independent of the attached driver load. Then again, if the amp is not designed properly, this kind of feedback may cause instability and cause loud noise being generated by the amplifier if particular loudspeakers are attached. One more approach makes use of audio transformers between the power stage of the amplifier and several outputs. Every single output was created to connect a different speaker load. This method ensures that the amplifier will be loaded equally and in addition improves amplifier power efficiency.
Cordless loudspeakers are made to transmit and the reproduce a sound signal to moderate or large sound level. Suppliers typically present the frequency range over which the wireless loudspeakers operate. Usually a lower and upper frequency are listed, such as 20 Hz - 20 kHz. This kind of specification suggests that the wireless speakers will be able to transmit and then reproduce music inside this frequency range. However, there's far more to comprehending the cordless loudspeakers's overall performance than just reviewing these figures.
A large frequency response does not always mean the wireless loudspeakers offer great sound quality. For instance a set of cordless loudspeakers that has a frequency response between 30 Hz and 15 kHz may sound much better than a different set having a response between 10 Hz and 30 kHz. Moreover, every producer, it seems, implements a different technique for specifying the lowest and highest frequency of their cordless loudspeakers. The standard convention is to show the frequency range inside of which the sound pressure level of the loudspeakers will decrease at most 3 dB from the nominal level.
You also will want to look at the conditions under which the frequency response was measured. You normally will not find any specifics about the measurement conditions, unfortunately, in the maker's data sheet. The fact is that many amplifiers which are incorporated into the wireless loudspeakers are going to behave differently with different speaker loads. This is due to the fact that different speaker loads will cause changes to the behavior of the output power stage of the amplifier.
Mainly contemporary cordless loudspeakers 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 amplifiers make use of switching FETs as the power stage that produce a great deal of switching components. These components are eliminated with a filter which is part of the internal speaker amp. A changing loudspeaker driver load will impact the filter response to some extent. Commonly the lower the speaker driver impedance the lower the maximum frequency of the built-in amp. Furthermore, the linearity of the amplifier gain will be determined by the driver load.
A few of the latest digital amps feed back the music signal after the lowpass filter in order to compensate for this tradeoff and to make the frequency response of the amplifier independent of the attached driver load. Then again, if the amp is not designed properly, this kind of feedback may cause instability and cause loud noise being generated by the amplifier if particular loudspeakers are attached. One more approach makes use of audio transformers between the power stage of the amplifier and several outputs. Every single output was created to connect a different speaker load. This method ensures that the amplifier will be loaded equally and in addition improves amplifier power efficiency.
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