Wireless loudspeaker vendors normally publish the frequency response of their goods which, however, won't necessarily explain to you a great deal about the audio quality. I am going to make clear the meaning of this term and also provide some recommendations on how to interpret it when looking for a set of cordless loudspeakers. A set of cordless loudspeakers are able to only work within a specific frequency range. Any kind of signals just outside of this range will be removed. As such the frequency response gives a crucial clue pertaining to whether or not a particular set of cordless loudspeakers might be well suited for a particular use. Typically a lower and upper frequency are given, for example 20 Hz - 20 kHz. This spec indicates that the cordless loudspeakers will be able to transmit and then reproduce music inside this frequency range. Yet, there's more to comprehending the cordless loudspeakers's performance than just looking at these numbers.
A set of cordless speakers are going to transmit and the reproduce an audio signal that is inside the frequency response range. This range is specified by showing two frequencies: a lower as well as upper frequency. To give an example, the lower frequency could be 20 Hz and the higher frequency 20 kHz. From this spec it appears the wireless loudspeakers could function as a set of HIFI speakers. You might be lured to go with a set ofcordless loudspeakers which provides the largest frequency response. Yet, there is more to understanding a cordless speakers's functionality than merely knowing this simple range.
A large frequency response does not always mean the cordless loudspeakers offer great audio quality. For instance a set of cordless speakers having a frequency response between 30 Hz and 15 kHz may sound better than a different set having a response between 10 Hz and 30 kHz. In addition, each supplier, it seems, implements a different technique for specifying the minimum and maximum frequency of their cordless speakers. Typically, the frequency response displays the standard working range of the wireless loudspeakers. Within this range, the sound pressure level is largely constant. At the upper and lower cutoff frequencies the gain will decrease by no more than 3 decibels.
You also will want to look at the conditions under which the frequency response was measured. You generally will not find any kind of details about the measurement conditions, unfortunately, in the maker's data sheet. The fact is amplifiers may have different frequency responses depending on the speaker driver element that is built in.
This change is most obvious with many cordless speakers that use digital amps, also referred to as Class-D amps. Class-D amplifiers employ a lowpass filter in their output in order to reduce the switching components which are produced from the internal power FETs. A varying loudspeaker driver load is going to affect the filter response to some extent. Normally the lower the speaker driver impedance the lower the maximum frequency of the built-in amplifier. Also, the linearity of the amplifier gain will depend on the driver load.
A few of the newest digital amplifiers feed back the music signal after the lowpass filter so as to compensate for this drawback and also to make the frequency response of the amplifier independent of the attached driver load. However, if the amplifier is not designed properly, this sort of feedback could potentially cause instability and bring about loud noise being produced by the amplifier if specific loudspeakers are connected. Yet another method makes use of audio transformers between the power stage of the amplifier and several outputs. Each output is designed to connect a different loudspeaker load. This method ensures that the amplifier will be loaded equally and also improves amplifier efficiency.
A set of cordless speakers are going to transmit and the reproduce an audio signal that is inside the frequency response range. This range is specified by showing two frequencies: a lower as well as upper frequency. To give an example, the lower frequency could be 20 Hz and the higher frequency 20 kHz. From this spec it appears the wireless loudspeakers could function as a set of HIFI speakers. You might be lured to go with a set ofcordless loudspeakers which provides the largest frequency response. Yet, there is more to understanding a cordless speakers's functionality than merely knowing this simple range.
A large frequency response does not always mean the cordless loudspeakers offer great audio quality. For instance a set of cordless speakers having a frequency response between 30 Hz and 15 kHz may sound better than a different set having a response between 10 Hz and 30 kHz. In addition, each supplier, it seems, implements a different technique for specifying the minimum and maximum frequency of their cordless speakers. Typically, the frequency response displays the standard working range of the wireless loudspeakers. Within this range, the sound pressure level is largely constant. At the upper and lower cutoff frequencies the gain will decrease by no more than 3 decibels.
You also will want to look at the conditions under which the frequency response was measured. You generally will not find any kind of details about the measurement conditions, unfortunately, in the maker's data sheet. The fact is amplifiers may have different frequency responses depending on the speaker driver element that is built in.
This change is most obvious with many cordless speakers that use digital amps, also referred to as Class-D amps. Class-D amplifiers employ a lowpass filter in their output in order to reduce the switching components which are produced from the internal power FETs. A varying loudspeaker driver load is going to affect the filter response to some extent. Normally the lower the speaker driver impedance the lower the maximum frequency of the built-in amplifier. Also, the linearity of the amplifier gain will depend on the driver load.
A few of the newest digital amplifiers feed back the music signal after the lowpass filter so as to compensate for this drawback and also to make the frequency response of the amplifier independent of the attached driver load. However, if the amplifier is not designed properly, this sort of feedback could potentially cause instability and bring about loud noise being produced by the amplifier if specific loudspeakers are connected. Yet another method makes use of audio transformers between the power stage of the amplifier and several outputs. Each output is designed to connect a different loudspeaker load. This method ensures that the amplifier will be loaded equally and also improves amplifier efficiency.
Aucun commentaire:
Enregistrer un commentaire