When selecting a new set of wireless loudspeakers, you most likely will take a glimpse at the technical specs. An often found spec is the frequency response. This spec whilst vital will not tell the full story with regards to how well the speakers are going to sound. I will explain the meaning of this expression and additionally provide some recommendations on how to interpret it whilst searching for a set of cordless speakers. A set of cordless loudspeakers are transmit and the reproduce an audio signal that is within the frequency response range. If the frequency range is 20 Hz to 20 kHz for example, the wireless loudspeakers (You can get helpful information concerning wireless speakers with transmitter at amphony.com) would be able to transmit any signals with a frequency greater than 20 Hz and less than 20 kHz. Yet, there is far more to comprehending the cordless speakers’s performance than just taking a look at these numbers. A large frequency response does not necessarily mean the cordless loudspeakers have good audio quality. For example a set of cordless loudspeakers having a frequency response between 30 Hz and 15 kHz may sound better than another set having a response between 10 Hz and 30 kHz. Also, each supplier, it appears, uses a different technique of specifying the lowest and maximum frequency of their cordless speakers. The standard convention is to display the frequency range inside which the sound pressure level of the speakers will decrease no more than 3 dB from the nominal level.
However, many makers dismiss this particular established practice. They push the lower frequency and upper frequency to where the wireless speakers rarely offer any sound response. In addition, these numbers say nothing about how linear the wireless speakers are working inside this range. A full frequency response chart, however, will demonstrate whether there are any peaks and valleys and also show how the frequency response is to be interpreted. You can even want to request a phase response chart that also provides important clues about the audio quality.
The circumstances under which the frequency response was calculated are also crucial to recognize. The fact is amplifiers may have different frequency responses depending on the speaker driver element which is built in. This change is most obvious with most wireless speakers that use digital amplifiers, also referred to as Class-D amps. Class-D amps employ a lowpass filter within their output in order to reduce the switching components which are produced through the internal power FETs. A varying speaker driver load is going to affect the filter response to a point. Generally the lower the loudspeaker driver impedance the lower the highest frequency of the built-in amp. Also, the linearity of the amplifier gain is going to be determined by the driver load. A number of amp topologies offer a mechanism to compensate for variations in the amplifier gain with various speaker loads. One of those methods makes use of feedback. The amplifier output signal after the internal lowpass is input to the amplifier input for comparison. If not developed adequately, this method could potentially cause instability of the amp though. Different amplifiers utilize transformers and offer outputs for various loudspeaker loads. Apart from improving upon the frequency response of the amplifier, this approach normally furthermore enhances the amplifier power efficiency. Moreover, take a look at the following web site: http://www.businesstimes.com.sg/archive/wednesday/lifestyle/gadgets-gaming/music-move-20130608.
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