The frequency response is just about the most commonly found parameter in order to characterize cordless loudspeakers. However, it might often be confusing and may not always provide a good indication of the sound quality. In order to help you make a wiser purchasing decision, I will explain what this spec means and how to understand it. This I hope is going to make certain you're going to get the perfect wireless loudspeakers for your project.
In truth, a set of wireless loudspeakers that has a frequency response from 10 Hz to 30 kHz might actually have much lesser audio quality than a set that offers a frequency response from 20 Hz to 15 kHz. Different companies appear to utilize different ways to define frequency response. The conventional convention is to present the frequency range within which the sound pressure level of the loudspeakers is going to drop a maximum of 3 dB from the nominal level.
On the other hand, the frequency response commonly is used to mislead shoppers by way of stretching the frequency range a great deal past the range where the wireless loudspeakers still work properly and in addition hides the reality that the wireless speakers aren't linear. A complete frequency response graph, on the other hand, will show if there are any kind of peaks and valleys and in addition show the way the frequency response is to be understood. Peaks along with valleys might cause colorization of the sound. Ideally the sound pressure level of the wireless speakers should be linear over the entire operating range.
You also will want to look at the circumstances under which the frequency response was determined. You normally will not find any kind of information about the measurement conditions, unfortunately, in the manufacturer's data sheet. The fact is that a lot of amplifiers which are incorporated into the cordless speakers will function differently with different speaker loads. This is mainly because that various speaker loads will result in changes to the behavior of the output power stage of the amplifier.
Generally current cordless loudspeakers which use digital or "Class-D" amps can have changes in the frequency response with various driver loads. The reason is the fact that Class-D amplifiers utilize switching FETs as the power stage that generate significant amounts of switching components. These components are eliminated using a filter that is part of the internal speaker amplifier. A varying speaker driver load will impact the filter response to some degree. Normally the lower the speaker driver impedance the lower the highest frequency of the built-in amp. Also, the linearity of the amplifier gain will depend on the driver load.
Several amp topologies provide a mechanism to compensate for variations in the amplifier gain with various loudspeaker loads. One of these techniques employs feedback. The amplifier output signal after the interior lowpass is input to the amplifier input for comparison. If not developed adequately, this method could cause instability of the amp however. One more strategy is to offer specific outputs for different loudspeaker driver impedances that are attached to the amplifier power stage through audio transformers.
In truth, a set of wireless loudspeakers that has a frequency response from 10 Hz to 30 kHz might actually have much lesser audio quality than a set that offers a frequency response from 20 Hz to 15 kHz. Different companies appear to utilize different ways to define frequency response. The conventional convention is to present the frequency range within which the sound pressure level of the loudspeakers is going to drop a maximum of 3 dB from the nominal level.
On the other hand, the frequency response commonly is used to mislead shoppers by way of stretching the frequency range a great deal past the range where the wireless loudspeakers still work properly and in addition hides the reality that the wireless speakers aren't linear. A complete frequency response graph, on the other hand, will show if there are any kind of peaks and valleys and in addition show the way the frequency response is to be understood. Peaks along with valleys might cause colorization of the sound. Ideally the sound pressure level of the wireless speakers should be linear over the entire operating range.
You also will want to look at the circumstances under which the frequency response was determined. You normally will not find any kind of information about the measurement conditions, unfortunately, in the manufacturer's data sheet. The fact is that a lot of amplifiers which are incorporated into the cordless speakers will function differently with different speaker loads. This is mainly because that various speaker loads will result in changes to the behavior of the output power stage of the amplifier.
Generally current cordless loudspeakers which use digital or "Class-D" amps can have changes in the frequency response with various driver loads. The reason is the fact that Class-D amplifiers utilize switching FETs as the power stage that generate significant amounts of switching components. These components are eliminated using a filter that is part of the internal speaker amplifier. A varying speaker driver load will impact the filter response to some degree. Normally the lower the speaker driver impedance the lower the highest frequency of the built-in amp. Also, the linearity of the amplifier gain will depend on the driver load.
Several amp topologies provide a mechanism to compensate for variations in the amplifier gain with various loudspeaker loads. One of these techniques employs feedback. The amplifier output signal after the interior lowpass is input to the amplifier input for comparison. If not developed adequately, this method could cause instability of the amp however. One more strategy is to offer specific outputs for different loudspeaker driver impedances that are attached to the amplifier power stage through audio transformers.
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