The frequency response is one of the most commonly found parameter to define wireless loudspeakers. Having said that, it may regularly be deceptive and may not always provide a good sign of the sound quality. I will clarify the meaning of this term and additionally give a few recommendations on how to interpret it when searching for a set of wireless loudspeakers.
A large frequency response doesn't imply the cordless speakers offer good audio quality. For example a set of cordless loudspeakers with 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. Moreover, each supplier, it seems, utilizes a different technique for specifying the minimum and highest frequency of their wireless loudspeakers. Usually, the frequency response displays the normal operating range of the wireless loudspeakers. Within this range, the sound pressure level is basically constant. At the upper and lower cutoff frequencies the gain will drop by no more than 3 decibels.
Then again, some manufacturers push this standard to the limit and often will list an upper frequency where the cordless loudspeakers will hardly deliver a beep any longer. Additionally, merely looking at these 2 numbers isn't going to say much concerning the linearity of the frequency response. A full frequency response chart, however, will demonstrate whether or not there are any peaks and valleys and in addition show the way the frequency response is to be understood. Peaks along with valleys may cause colorization of the audio. If possible the cordless loudspeakers needs to have a constant sound pressure level within the whole frequency response except for the drop off at the upper and lower limit. In addition to the frequency response, a phase response diagram may also tell a whole lot about the overall performance and quality of sound of the cordless loudspeakers.
You furthermore will want to look at the circumstances under which the frequency response was measured. You usually won't find any kind of specifics about the measurement conditions, unfortunately, in the maker's data sheet. The fact is that lots of amps which are incorporated into the cordless loudspeakers are going to behave differently with different loudspeaker loads. This is because of the fact that various loudspeaker loads will result in changes to the behavior of the output power stage of the amplifier.
Primarily modern wireless 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 utilize switching FETs as the power phase which generate significant amounts of switching components. These components are removed by a filter which is part of the internal speaker amp. A changing speaker driver load will impact the filter response to a point. Usually the lower the speaker driver impedance the lower the highest frequency of the built-in amp. Furthermore, the linearity of the amplifier gain is going to depend on the driver load.
Several of the most recent digital amps feed back the audio signal following the lowpass filter to be able to compensate for this drawback and also to make the frequency response of the amp independent of the connected driver load. On the other hand, if the amplifier is not constructed properly, this kind of feedback could cause instability and cause loud noise being created by the amplifier if particular speakers are attached. Other amps use transformers and provide outputs for various speaker loads. Apart from improving the frequency response of the amplifier, this approach usually furthermore improves the amplifier power efficiency.
A large frequency response doesn't imply the cordless speakers offer good audio quality. For example a set of cordless loudspeakers with 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. Moreover, each supplier, it seems, utilizes a different technique for specifying the minimum and highest frequency of their wireless loudspeakers. Usually, the frequency response displays the normal operating range of the wireless loudspeakers. Within this range, the sound pressure level is basically constant. At the upper and lower cutoff frequencies the gain will drop by no more than 3 decibels.
Then again, some manufacturers push this standard to the limit and often will list an upper frequency where the cordless loudspeakers will hardly deliver a beep any longer. Additionally, merely looking at these 2 numbers isn't going to say much concerning the linearity of the frequency response. A full frequency response chart, however, will demonstrate whether or not there are any peaks and valleys and in addition show the way the frequency response is to be understood. Peaks along with valleys may cause colorization of the audio. If possible the cordless loudspeakers needs to have a constant sound pressure level within the whole frequency response except for the drop off at the upper and lower limit. In addition to the frequency response, a phase response diagram may also tell a whole lot about the overall performance and quality of sound of the cordless loudspeakers.
You furthermore will want to look at the circumstances under which the frequency response was measured. You usually won't find any kind of specifics about the measurement conditions, unfortunately, in the maker's data sheet. The fact is that lots of amps which are incorporated into the cordless loudspeakers are going to behave differently with different loudspeaker loads. This is because of the fact that various loudspeaker loads will result in changes to the behavior of the output power stage of the amplifier.
Primarily modern wireless 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 utilize switching FETs as the power phase which generate significant amounts of switching components. These components are removed by a filter which is part of the internal speaker amp. A changing speaker driver load will impact the filter response to a point. Usually the lower the speaker driver impedance the lower the highest frequency of the built-in amp. Furthermore, the linearity of the amplifier gain is going to depend on the driver load.
Several of the most recent digital amps feed back the audio signal following the lowpass filter to be able to compensate for this drawback and also to make the frequency response of the amp independent of the connected driver load. On the other hand, if the amplifier is not constructed properly, this kind of feedback could cause instability and cause loud noise being created by the amplifier if particular speakers are attached. Other amps use transformers and provide outputs for various speaker loads. Apart from improving the frequency response of the amplifier, this approach usually furthermore improves the amplifier power efficiency.
