By Michelle Jaeger
If you are ready to purchase brand new cordless loudspeakers, you may well be asking yourself how efficiently your wireless loudspeakers operate. Let me make clear what the expression "power efficiency" means plus why you ought to take a closer look at this figure throughout your selection of new wireless loudspeakers. Various challenges are caused by cordless loudspeakers that have low power efficiency: Cordless speakers that have small power efficiency are going to waste a certain amount of energy. It's smart to make note of the additional power cost while choosing between a high- and low-efficiency model. The wasted power is radiated by the cordless loudspeakers as heat. Heat won't radiate well from little surfaces. Consequently low-efficiency cordless speakers require to use heat sinks. Heat sinks and fans are heavy, use up space and also produce noises. Cordless speakers that have low efficiency cannot be put in small spaces or within sealed enclosures as they need a good amount of circulation.
A fairly high amount of energy is dissipated as heat when you get a pair of low-efficiency cordless loudspeakers. This can produce some issues: Low-efficiency cordless loudspeakers will waste a certain amount of energy as heat and are more expensive to run than high-efficiency products due to their larger energy utilization. Heat does not radiate effectively from small surfaces. For that reason low-efficiency wireless loudspeakers must use heat sinks. Heat sinks and fans demand room and are pricey. The wireless loudspeakers hence is going to become relatively large and expensive. Additionally heat fans will generate operating noise. Cordless speakers with low efficiency can not be put in small spaces or inside sealed enclosures given that they require a good amount of circulation.
Wireless speakers that have small efficiency have to have a bigger power supply to output the identical level of music power as high-efficiency models. An increased amount of heat causes further stress on components. The life expectancy of the wireless speakers can be reduced and reliability could be compromised. High-efficiency cordless loudspeakers on the other hand do not endure these problems and may be constructed very small.
What is less known about efficiency is the fact that this figure is not fixed. In reality it differs based on how much power the amplifier offers. For that reason at times you'll find efficiency values for different energy levels in the data sheet. Because each amplifier will require a particular amount of power, regardless of the level of energy the amplifier provides to the loudspeakers, the amp efficiency is higher the more power the amplifier delivers and is usually given for the maximum power the amplifier can handle.
What's less well-known about efficiency is the fact that this figure isn't fixed. Actually it fluctuates depending on how much power the amplifier delivers. Therefore occasionally you will discover efficiency values for different energy levels within the data sheet. Given that every amp will require a specific level of power, regardless of the amount of energy the amplifier provides to the speakers, the amp efficiency is higher the more energy the amp delivers and is usually specified for the highest power the amp can handle. In order to determine the power efficiency, the audio energy that is consumed by a power resistor which is attached to the amplifier is divided by the total energy the amplifier utilizes while being fed a constant sine wave tone. Because the efficiency depends upon the audio power, normally the output power is swept and an efficiency curve created which can show the amplifier efficiency for each level of output power.
While switching (Class-D) amplifiers have amongst the largest efficiency, they tend to have higher audio distortion than analog music amplifiers and reduced signal-to-noise ratio. Thus you will have to weigh the dimensions of the wireless speakers against the sound fidelity. However, the most recent wireless speakers that use switching-mode music amps, just like Class-T amplifiers, provide audio fidelity that comes close to that of low-efficiency analog amps and can be built extra small and lightweight.
A fairly high amount of energy is dissipated as heat when you get a pair of low-efficiency cordless loudspeakers. This can produce some issues: Low-efficiency cordless loudspeakers will waste a certain amount of energy as heat and are more expensive to run than high-efficiency products due to their larger energy utilization. Heat does not radiate effectively from small surfaces. For that reason low-efficiency wireless loudspeakers must use heat sinks. Heat sinks and fans demand room and are pricey. The wireless loudspeakers hence is going to become relatively large and expensive. Additionally heat fans will generate operating noise. Cordless speakers with low efficiency can not be put in small spaces or inside sealed enclosures given that they require a good amount of circulation.
Wireless speakers that have small efficiency have to have a bigger power supply to output the identical level of music power as high-efficiency models. An increased amount of heat causes further stress on components. The life expectancy of the wireless speakers can be reduced and reliability could be compromised. High-efficiency cordless loudspeakers on the other hand do not endure these problems and may be constructed very small.
What is less known about efficiency is the fact that this figure is not fixed. In reality it differs based on how much power the amplifier offers. For that reason at times you'll find efficiency values for different energy levels in the data sheet. Because each amplifier will require a particular amount of power, regardless of the level of energy the amplifier provides to the loudspeakers, the amp efficiency is higher the more power the amplifier delivers and is usually given for the maximum power the amplifier can handle.
What's less well-known about efficiency is the fact that this figure isn't fixed. Actually it fluctuates depending on how much power the amplifier delivers. Therefore occasionally you will discover efficiency values for different energy levels within the data sheet. Given that every amp will require a specific level of power, regardless of the amount of energy the amplifier provides to the speakers, the amp efficiency is higher the more energy the amp delivers and is usually specified for the highest power the amp can handle. In order to determine the power efficiency, the audio energy that is consumed by a power resistor which is attached to the amplifier is divided by the total energy the amplifier utilizes while being fed a constant sine wave tone. Because the efficiency depends upon the audio power, normally the output power is swept and an efficiency curve created which can show the amplifier efficiency for each level of output power.
While switching (Class-D) amplifiers have amongst the largest efficiency, they tend to have higher audio distortion than analog music amplifiers and reduced signal-to-noise ratio. Thus you will have to weigh the dimensions of the wireless speakers against the sound fidelity. However, the most recent wireless speakers that use switching-mode music amps, just like Class-T amplifiers, provide audio fidelity that comes close to that of low-efficiency analog amps and can be built extra small and lightweight.