The frequency response is by far the most frequently found parameter in order to define cordless speakers. Nevertheless, it can regularly be misleading and may possibly not provide a good sign of the sound quality. In order to help you make a more intelligent buying decision, I am going to make clear what this spec means and the way to interpret it. This I hope is going to ensure you'll get the ideal cordless speakers for your project.

A set of cordless speakers are transmit and the reproduce an audio signal that is inside the frequency response range. Generally a lower and upper frequency are listed, for instance 20 Hz - 20 kHz. This particular specification suggests that the wireless loudspeakers have the capacity to transmit and then reproduce music within this frequency range. Yet, there's far more to understanding the cordless loudspeakers's functionality than merely considering these numbers.

However, many manufacturers overlook this established practice. They push the lower frequency and upper frequency to where the cordless loudspeakers rarely offer any sound response. What's more, these numbers say next to nothing about precisely how linear the cordless loudspeakers are functioning inside this range. Ideally you should make an effort to get a frequency response diagram from the manufacturer. In this diagram, you'll discover the way the wireless speakers behave within the frequency response range. Additionally you can spot any peaks and / or valleys the wireless speakers may have. You may also wish to demand a phase response diagram which offers crucial hints in regards to the sound quality.

In order to better understand the frequency response behavior of a particular type, you should attempt to find out under which conditions the response was calculated. You'll find this data in the data sheet of the wireless loudspeakers. Then again, many producers will not publish these in which case you should get in touch with the maker directly. One condition which may effect the frequency response is the impedance of the speaker driver built into the cordless speakers. Typical loudspeaker driver impedances vary from 2 to 16 Ohms. The lower the speaker driver impedance the greater the load for the internal amplifier.

The frequency response of Class-D amps shows the biggest change with different speaker loads because of the integrated lowpass filter that removes switching noise from the speaker amplifier's signal. The lowpass filter characteristic, on the other hand, greatly varies according to the attached speaker load.

A few amp topologies offer a mechanism to compensate for changes in the amplifier gain with various loudspeaker loads. One of those approaches makes use of feedback. The amplifier output signal following the internal lowpass is input to the amplifier input for comparison. If not created correctly, this technique could potentially cause instability of the amplifier however. A different strategy is to provide dedicated outputs for different speaker driver impedances that are connected to the amp power phase via audio transformers.