The latest amplifiers appear in all shapes and sizes. Finding the ideal model for your application can often be tricky. There is a large number of different names and terms describing stereo amplifiers, such as "Class D" or "T-amp". Also, each producer publishes a big quantity of specs, including "SNR", "dynamic distortion" et cetera. In this expose, I am going to have a closer look at one of the most essential of these terms: "amplifier output wattage". This term is also known as "wattage". A number of of the technical jargon which amplifier producers publish regularly are deceptive and do not inevitably give a good indication of the actual functioning of the amp. Next I am going to explain the "wattage" rating of audio amplifiers. This spec is one of the most essential and maybe vital specifications to comprehend.
A number of of the terms which amp companies publish frequently are ambiguous and do not inevitably offer a decent indication of the real performance of the amp. Next I will explain the "wattage" spec of audio amps. This rating is one of the most basic and perhaps essential specifications to be aware of.
Several specs are going to give the wattage in "Watts peak" whilst others will publish "Watts rms". "Peak" means that the amplifier is able to provide the wattage for a short period of time only whilst "Watts rms" means that the amplifier is going to constantly deliver that amount of power. The peak power rating in the past often led to producers displaying large wattage specs for tiny amps. On the other hand, in reality these amps would not be able to sustain bigger levels of output power for larger amounts of time.
Music and voice is not constant regarding volume. Thus the peak power rating is still essential, though not as important as the rms power specification. Ideally the audio amplifier will display both the rms and peak power rating. Having a high peak power spec will guarantee adequate headroom for audio peaks which are widespread in audio signals. The most important reason is that music signals will have short bursts of high power which the amp has to cope with. Rms power is measured with a uniform sine signal which hardly compares with a music signal by way of the power envelope.
Please notice that often the peak output power of the amp will depend upon the impedance of your loudspeakers which is normally between 4 and 8 Ohms. An audio amplifier which has a fixed internal supply voltage will have a maximum output voltage swing that is limited by that supply voltage. If you are driving an 8-Ohm speaker then the amplifier has to output twice the output voltage than when driving a 4-Ohm speaker to be able to output the same amount of wattage. Consequently frequently largest output power is shown for a certain speaker impedance.
A number of of the terms which amp companies publish frequently are ambiguous and do not inevitably offer a decent indication of the real performance of the amp. Next I will explain the "wattage" spec of audio amps. This rating is one of the most basic and perhaps essential specifications to be aware of.
Several specs are going to give the wattage in "Watts peak" whilst others will publish "Watts rms". "Peak" means that the amplifier is able to provide the wattage for a short period of time only whilst "Watts rms" means that the amplifier is going to constantly deliver that amount of power. The peak power rating in the past often led to producers displaying large wattage specs for tiny amps. On the other hand, in reality these amps would not be able to sustain bigger levels of output power for larger amounts of time.
Music and voice is not constant regarding volume. Thus the peak power rating is still essential, though not as important as the rms power specification. Ideally the audio amplifier will display both the rms and peak power rating. Having a high peak power spec will guarantee adequate headroom for audio peaks which are widespread in audio signals. The most important reason is that music signals will have short bursts of high power which the amp has to cope with. Rms power is measured with a uniform sine signal which hardly compares with a music signal by way of the power envelope.
Please notice that often the peak output power of the amp will depend upon the impedance of your loudspeakers which is normally between 4 and 8 Ohms. An audio amplifier which has a fixed internal supply voltage will have a maximum output voltage swing that is limited by that supply voltage. If you are driving an 8-Ohm speaker then the amplifier has to output twice the output voltage than when driving a 4-Ohm speaker to be able to output the same amount of wattage. Consequently frequently largest output power is shown for a certain speaker impedance.
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