Uncovering The Truth About Modern Cordless Loudspeakers

By Michelle Finger


Cordless speaker vendors usually present the frequency response of their items that, regrettably, will not always explain to you a lot concerning the sound quality. You may possibly not completely understand just how the frequency response is measured. I'll clarify what specifically this expression means. I hope you will be able to make a more educated buying decision. Wireless speakers are made to transmit and the reproduce a music signal to medium or higher volume. Producers normally show the frequency range over which the cordless speakers operate. If the frequency range is 20 Hz to 20 kHz as an example, the cordless loudspeakers would be able to transmit any signals with a frequency greater than 20 Hz and lower than 20 kHz. It might seem the larger the frequency response the better the cordless loudspeakers. That, on the other hand, may not always be the case. You have to check out the specifications far more carefully so that you can properly interpret them.

Wireless speakers are made to transmit and the reproduce a sound signal to medium or higher sound level. Makers generally show the frequency range over which the wireless speakers function. If the frequency range is 20 Hz to 20 kHz for instance, the cordless loudspeakers can transmit all signals with a frequency higher than 20 Hz and less than 20 kHz. You may very well be tempted to decide on a set ofcordless speakers that provides the biggest frequency response. Then again, there is more to knowing a cordless speakers's overall performance than only realizing this simple range.

Then again, some producers push this standard to the limit and will show a maximum frequency where the cordless loudspeakers will hardly create a beep anymore. In addition, just looking at these 2 figures won't say a lot about the linearity of the frequency response. A complete frequency response chart, however, will show whether there are any kind of peaks or valleys and in addition show the way the frequency response is to be understood. Peaks and valleys could potentially cause colorization of the audio. If at all possible the sound pressure level of the cordless speakers should be linear over the entire working range.

In order to better comprehend the frequency response behavior of a particular type, you should make an effort to figure out under which circumstances the response was calculated. You will probably find this data in the data sheet of the cordless speakers. Then again, most makers won't show these in which case you might need to make contact with the manufacturer directly. Actually amps might have different frequency responses depending on the speaker driver element that is built in.

To better understand the frequency response behavior of a particular type, you should attempt to determine under which circumstances the response was determined. You'll find these details in the data sheet of the wireless loudspeakers. Then again, most suppliers will not show these in which case you should get in touch with the producer directly. The fact is that a large number of amplifiers which are incorporated into the wireless speakers are going to function in a different way with different loudspeaker loads. This is because of the fact that various loudspeaker loads can cause changes to the behavior of the output power stage of the amp. The frequency response of Class-D amplifiers shows the largest change with various speaker loads due to the built-in lowpass filter that eliminates switching noise from the speaker amplifier's signal. The lowpass filter characteristic, however, heavily varies according to the connected speaker load.

Several amplifier topologies provide a mechanism to compensate for variations in the amplifier gain with various speaker loads. One example of these approaches makes use of feedback. The amplifier output signal following the interior lowpass is input to the amplifier input for comparison. If not designed properly, this method could cause instability of the amp however. Another method utilizes audio transformers between the power stage of the amp and various outputs. Every single output was designed to connect a different speaker load. This approach makes certain that the amplifier will be loaded equally and in addition improves amplifier efficiency.




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