Benefits Of High-Efficiency Music AmplifiersLet me clarify just what the term "power efficiency" stands for plus why you must take a closer look at this figure throughout your selection of a new amp.
Heat does not radiate well through tiny surfaces. To help dissipate heat, low-power-efficiency amplifiers need to have adequate air circulation. Consequently they cannot be placed in places with no circulation. Additionally, they can not be installed in water-resistant enclosures.
As a result they need a larger power source which makes the amplifier more costly to produce. The lifespan of the amp might be decreased and dependability may be jeopardized. Power efficiency is commonly shown in percent. Class-A amps are usually the least efficient and Class-D the most efficient. The efficiency figure in the amp data sheet is typically provided for the highest amp output power.
Next the energy used by the resistor is tested and divided by the power the amp consumes. Generally a complete power profile is plotted in order to show the dependence of the efficiency on the output power. The efficiency at every value is measured plus a efficiency plot generated.
While picking an audio amplifier you need to weigh efficiency versus fidelity given that low-efficiency analog mini stereo amplifiers often deliver the largest music fidelity while digital models will have bigger distortion.