Current cordless loudspeakers will by nature waste a certain level of energy they use up. Choosing set of wireless speakers with high power efficiency could minimize the amount of wasted power. I am going to explain a number of little-known facts about efficiency that will help you select the best product.
Low-efficiency versions consume more overall energy to create the identical level of audio power as high-efficiency types. Consequently they need a bigger power supply which makes the wireless speakers more expensive to produce. An elevated level of heat causes further stress on elements. The lifespan of the wireless loudspeakers may be reduced and dependability can be compromised. High-efficiency wireless speakers in contrast do not suffer from these issues and can be constructed small.
The efficiency is shown as a percentage in the wireless speakers data sheet. Class-A amps are amongst the least efficient and provide a efficiency of around 25% only. On the other hand, switching amplifiers, also referred to as "Class-D" amplifiers offer efficiencies as high as 98%. The larger the efficiency figure, the less the level of energy squandered as heat. A 100-Watt amplifier having 50% efficiency will have an energy usage of 200 Watts.
Then again, there are some things to notice about power efficiency. For starters, this figure depends on the amount of power that the amp is providing. Each audio amp is going to use up a certain level of energy irrespective of whether or not it supplies any kind of power to the speaker. Because of this the smaller the energy the amplifier provides, the smaller the power efficiency. For this reason audio manufacturers usually specify the efficiency for the greatest audio power that the amp can supply.
To measure the power efficiency, usually a test signal of 1 kHz is fed into the amplifier and a power resistor connected to the amplifier output to emulate the speaker load. Then the amp output signal is measured and the power level determined which the amplifier provides to the load which is subsequently divided by the total energy the amplifier utilizes. To get a full efficiency profile, the audio power of the amp is swept between several values. At each value the efficiency is assessed and plotted onto a graph.
Cordless speakers that use switching-mode amps have a switching stage that will cause some level of non-linear behavior. Thus cordless speakers that use Class-D amps normally have smaller music fidelity than types using analog Class-A amplifiers. Therefore you will need to base your buying decision on whether you require small size and minimal energy usage or maximum audio fidelity. Even so, the newest cordless speakers that use switching-mode audio amps, such as Class-T amplifiers, provide audio fidelity that comes close to that of low-efficiency analog amplifiers and can be made really small and lightweight.
Low-efficiency versions consume more overall energy to create the identical level of audio power as high-efficiency types. Consequently they need a bigger power supply which makes the wireless speakers more expensive to produce. An elevated level of heat causes further stress on elements. The lifespan of the wireless loudspeakers may be reduced and dependability can be compromised. High-efficiency wireless speakers in contrast do not suffer from these issues and can be constructed small.
The efficiency is shown as a percentage in the wireless speakers data sheet. Class-A amps are amongst the least efficient and provide a efficiency of around 25% only. On the other hand, switching amplifiers, also referred to as "Class-D" amplifiers offer efficiencies as high as 98%. The larger the efficiency figure, the less the level of energy squandered as heat. A 100-Watt amplifier having 50% efficiency will have an energy usage of 200 Watts.
Then again, there are some things to notice about power efficiency. For starters, this figure depends on the amount of power that the amp is providing. Each audio amp is going to use up a certain level of energy irrespective of whether or not it supplies any kind of power to the speaker. Because of this the smaller the energy the amplifier provides, the smaller the power efficiency. For this reason audio manufacturers usually specify the efficiency for the greatest audio power that the amp can supply.
To measure the power efficiency, usually a test signal of 1 kHz is fed into the amplifier and a power resistor connected to the amplifier output to emulate the speaker load. Then the amp output signal is measured and the power level determined which the amplifier provides to the load which is subsequently divided by the total energy the amplifier utilizes. To get a full efficiency profile, the audio power of the amp is swept between several values. At each value the efficiency is assessed and plotted onto a graph.
Cordless speakers that use switching-mode amps have a switching stage that will cause some level of non-linear behavior. Thus cordless speakers that use Class-D amps normally have smaller music fidelity than types using analog Class-A amplifiers. Therefore you will need to base your buying decision on whether you require small size and minimal energy usage or maximum audio fidelity. Even so, the newest cordless speakers that use switching-mode audio amps, such as Class-T amplifiers, provide audio fidelity that comes close to that of low-efficiency analog amplifiers and can be made really small and lightweight.
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