Are wireless stereo speakers a serious rival to wired loudspeakers?
Wireless loudspeakers include a number of parts. These kinds of parts just about all affect the loudspeaker audio fidelity.The audio fidelity of the loudspeaker is only able to be as good as the fidelity of the cordless transmission. Previous broadcast methods would use FM which results in hissing plus clicking of the loudspeaker depending upon the distance in between transmitter and loudspeaker and also the existence of interference. Present-day wireless networks often transform the music signal to information that is then sent within the digital domain. Digital audio broadcast provides quite a few state-of-the-art methods for compensating for interference from different products. This cordless technology is critical with regard to achieving great sound quality and high reliability.
Wireless stereo speakers possess a built-in power music amplifier. This amplifier drives the woofer and tweeter. The audio fidelity of this particular amplifier is also vital for the total loudspeaker audio fidelity. A large number of wireless loudspeakers use switch-mode (also called Class-D) power amps because of their high energy efficiency. Linear amps make use of either a discrete or integrated transistor power stage. Class-D amplifiers possess a power output stage which is very similar in design to the power stage of linear amplifiers. However, these transistors switch between the positive and negative supply rail. The outcome is a rectangular wave. The pulse width of this wave is regulated by a pulse-width modulator. This rectangular wave output signal includes various spectral parts. The main power is located around the switched-mode frequency. This switch-mode component which is usually to be found between 300 and 800 kHz is removed through a subsequent low-pass stage.
Switched-mode amplifiers have a number of issues related to harmonic distortion since their working method is nonlinear in nature. In spite of this, recently, the audio quality of Class-D power amplifiers is getting close to that of analog amplifiers. More sophisticated switch-mode amplifiers are used in numerous of today’s wireless stereo speakers. These kinds of amps frequently compensate for non-linearities by creating a feedback of the amplified music signal. By comparing the amplified signal with the initial music, amplifier non-linearities can be reduced. Note however that a minimal distortion doesn’t always mean good audio quality. Several amps using modest filters and distortion of about 0.05% exceed similar amps having under 0.001 % distortion when it comes to sound fidelity.
The enclosure of the loudspeaker itself and also the woofer and tweeter are essential for a good-quality loudspeaker. Badly constructed loudspeaker enclosures in many cases are causing very poor sound fidelity. In the same way, having good-quality transducers is vital with regards to producing a good speaker. One hurdle in making wireless loudspeakers is the fact that there are various components that have to be incorporated into the loudspeaker enclosure such as the wireless radio and also audio amp. Most of these parts are frequently pretty big. Hence they will affect the air volume of the speaker. Furthermore, sound waves will bounce off these kinds of components and probably cause rattling which is going to affect the sound. Cordless speaker housing designers don’t merely need to be worried about improving the audio quality. On top of that, they have to worry about the way to locate each of the internal components plus how to allow accessibility to the electronic controls and indicators. Every one of these parameters is going to have an impact on the loudspeaker sound. Just by perfecting all of the above concerns can great wireless loudspeakers be produced. A few of today’s available types of wireless speakers already come very close to the audio fidelity of their wired competitors. This gap is probably going to close given that the technological know-how gets better.