Recent audio amplifiers come in all shapes and sizes. Finding the ideal type for your application may frequently be tricky. There is a large number of different names and technical jargon describing audio amps, just like "Class D" or "T-amp". Furthermore, each producer shows a large number of specifications, including "SNR", "dynamic distortion" etc. I will provide a quick overview of the output power specification with the intention to help you better comprehend the significance of this specification and how it relates to the performance of an audio amplifier. Amp specs are from time to time tricky to interpret since they are not completely standardized. As such it may be hard to discover the true functioning of the amplifier merely by looking at the specifications. One decent approach however is to do a listening test ahead of purchasing your amp. Throughout this test you ideally wish to install the amplifier in a similar setting as your use. Next I am going to clarify the "wattage" specification of audio amps. This term is one of the most fundamental and maybe important specifications to understand.
A number of of the terms which amp manufacturers make public often are ambiguous and do not inevitably provide a good indication of the real performance of the amplifier. Let me now proceed and explain the power rating of stereo amplifiers.
"Output power" describes how loud your amplifier can drive your speakers. Depending on your application, you may go with a small amplifier delivering only a few watts or a bigger one offering several hundred watts. Most home stereos only have amplifiers that have several watts output power which typically is sufficient for a small space. If you intend to shake your walls then you clearly want to opt for an amp that has up to several hundred watts. Please note that various amps will start clipping the music as soon as the audio reaches bigger wattage. If you wish to get pleasure from low-distortion music then you may want to choose an amp that will offer you more wattage than you are going to actually require.
Nonetheless, even as the rms spec is going to tell you more about the amplifier's actual performance, be sure though that the amp offers a peak power specification which is substantially higher than the rms spec. This is because most likely you are going to be utilizing the amp to amplify music or voice. Music and voice signals by nature always vary regarding their power, i.e. the power envelope of the signal will fluctuate over time. The most important reason is that music signals are going to have brief bursts of high power which the amp has to cope with. Rms power is measured with a uniform sine wave that hardly compares with a music signal regarding the power envelope.
Please note that frequently the peak power of the amp is going to depend upon the impedance of your loudspeakers which is typically between 4 and 8 Ohms. An audio amplifier that has a fixed internal supply voltage will have a maximum output voltage swing which is limited by that supply voltage. If you are driving an 8-Ohm speaker then the amp must output two times the output voltage than when driving a 4-Ohm speaker to be able to deliver the same level of output power. Therefore frequently highest output power is shown for a specific speaker impedance.
A number of of the terms which amp manufacturers make public often are ambiguous and do not inevitably provide a good indication of the real performance of the amplifier. Let me now proceed and explain the power rating of stereo amplifiers.
"Output power" describes how loud your amplifier can drive your speakers. Depending on your application, you may go with a small amplifier delivering only a few watts or a bigger one offering several hundred watts. Most home stereos only have amplifiers that have several watts output power which typically is sufficient for a small space. If you intend to shake your walls then you clearly want to opt for an amp that has up to several hundred watts. Please note that various amps will start clipping the music as soon as the audio reaches bigger wattage. If you wish to get pleasure from low-distortion music then you may want to choose an amp that will offer you more wattage than you are going to actually require.
Nonetheless, even as the rms spec is going to tell you more about the amplifier's actual performance, be sure though that the amp offers a peak power specification which is substantially higher than the rms spec. This is because most likely you are going to be utilizing the amp to amplify music or voice. Music and voice signals by nature always vary regarding their power, i.e. the power envelope of the signal will fluctuate over time. The most important reason is that music signals are going to have brief bursts of high power which the amp has to cope with. Rms power is measured with a uniform sine wave that hardly compares with a music signal regarding the power envelope.
Please note that frequently the peak power of the amp is going to depend upon the impedance of your loudspeakers which is typically between 4 and 8 Ohms. An audio amplifier that has a fixed internal supply voltage will have a maximum output voltage swing which is limited by that supply voltage. If you are driving an 8-Ohm speaker then the amp must output two times the output voltage than when driving a 4-Ohm speaker to be able to deliver the same level of output power. Therefore frequently highest output power is shown for a specific speaker impedance.
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