Looking at several of the technical specs of today's audio amps, one cannot help but be at a loss in trying to compare different models as well as technical jargon, for example "t-amp", "THD" and so on. In this expose, I am going to have a glimpse at one of the most basic of these terms: "amplifier output power". This term is also often known as "wattage". Several of the technical jargon which amplifier companies make public often are confusing and do not necessarily offer a good indication of the actual functioning of the amplifier. Now I will present a few fine points regarding "amplifier output power". This specification is often misunderstood. It is significant to look fairly closely at how the manufacturer shows this parameter.
The output wattage of the audio amplifiers is shown as "wattage". This shows how loud your amplifier may drive your speakers. You want to pick the audio amplifier wattage depending on how large your listening space is. Most amps will have rising audio distortion as output power increases. As a result, you want to choose an amp which has higher output power than you will actually require. This is going to assure that you will never drive the amplifier into regions of high distortion.
The output power of the amplifiers is given as "wattage". This describes how loud your amplifier can drive your loudspeakers. If you have a small room then you don't require much more than several watts. If you want to set up loudspeakers outdoors or in a live show then you will need several hundred watts of power. Many amplifiers will have growing audio distortion as output power increases. Therefore, you want to pick an amp which offers bigger output power than you will in fact require. This will guarantee that you will never drive the amp into regions of big distortion.
Still, whereas the rms spec will tell you more about the amplifier's true performance, be sure though that the amplifier has a peak power specification that is quite a bit higher than the rms rating. This is because very likely you are going to be using the amp to amplify music or voice. Music and voice signals by nature always vary by way of their power, i.e. the power envelope of the audio is going to fluctuate over time. The most important reason is that audio signals are going to have short peaks of high power which the amplifier has to cope with. Rms power is measured with a uniform sine wave that hardly compares with a music signal regarding the power envelope.
Typically the impedance of the loudspeakers that you attach to the amp is going to determine how much power the amplifier may deliver. Speaker impedance is measured in Ohms. Normally speakers have an impedance between 4 and 8 Ohms. Amps have a restricted output voltage swing due to the fixed internal supply voltage. As such the maximum output power will differ depending on the speaker impedance. The smaller the speaker impedance the higher the highest power the amplifier can output. Regularly maximum power is given for a 4-Ohm speaker impedance. However, ideally the manufacturer is going to tell which speaker impedance the power rating is being referenced to. Please note that some amps cannot drive speakers with extremely low speaker impedance.
The output wattage of the audio amplifiers is shown as "wattage". This shows how loud your amplifier may drive your speakers. You want to pick the audio amplifier wattage depending on how large your listening space is. Most amps will have rising audio distortion as output power increases. As a result, you want to choose an amp which has higher output power than you will actually require. This is going to assure that you will never drive the amplifier into regions of high distortion.
The output power of the amplifiers is given as "wattage". This describes how loud your amplifier can drive your loudspeakers. If you have a small room then you don't require much more than several watts. If you want to set up loudspeakers outdoors or in a live show then you will need several hundred watts of power. Many amplifiers will have growing audio distortion as output power increases. Therefore, you want to pick an amp which offers bigger output power than you will in fact require. This will guarantee that you will never drive the amp into regions of big distortion.
Still, whereas the rms spec will tell you more about the amplifier's true performance, be sure though that the amplifier has a peak power specification that is quite a bit higher than the rms rating. This is because very likely you are going to be using the amp to amplify music or voice. Music and voice signals by nature always vary by way of their power, i.e. the power envelope of the audio is going to fluctuate over time. The most important reason is that audio signals are going to have short peaks of high power which the amplifier has to cope with. Rms power is measured with a uniform sine wave that hardly compares with a music signal regarding the power envelope.
Typically the impedance of the loudspeakers that you attach to the amp is going to determine how much power the amplifier may deliver. Speaker impedance is measured in Ohms. Normally speakers have an impedance between 4 and 8 Ohms. Amps have a restricted output voltage swing due to the fixed internal supply voltage. As such the maximum output power will differ depending on the speaker impedance. The smaller the speaker impedance the higher the highest power the amplifier can output. Regularly maximum power is given for a 4-Ohm speaker impedance. However, ideally the manufacturer is going to tell which speaker impedance the power rating is being referenced to. Please note that some amps cannot drive speakers with extremely low speaker impedance.
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