The latest audio amplifiers come in all shapes and sizes. There is a flood of different names and terms describing audio amplifiers, including “Class D” or “T-amp”. I am going to describe the term “amplifier wattage” a bit more in this editorial. “Power” is one of the most elementary terms describing amplifier functioning. Several manufacturers also in the past have used this term in a perplexing way to hide the real performance.
A decent method though is to do a listening test ahead of purchasing your amplifier. Through this test you ideally wish to set up the amp in a similar setting as your use. The output power of the small amplifiers is shown as “wattage”. Please note that various amps will begin distorting the music once the audio reaches higher wattage. If you wish to get pleasure from low-distortion audio then you may wish to choose an amplifier which is going to offer you more wattage than you will really need.
The peak output power specification in the past often led to manufacturers stating huge wattage specs for tiny amps. On the other hand, in practice these amplifiers would not be able to sustain larger levels of output power for larger periods of time.
Though, please make sure that your amplifier has sufficient headroom to stay away from clipping of the audio. Having adequate headroom is crucial given that music signals differ a great deal from sine wave signals which are used to quantify rms power. Brief bursts of large power are repeatedly found in music signals. These peaks are going to drive the amp into large distortion unless the peak power is high enough.
Loudspeakers frequently have impedances between 4 and 8 Ohms. Regularly a 4-Ohm speaker is used as a reference.