When it comes to an integrated or audio amplifier, there are many things that can influence the choice. An audio amplifier is an important piece of equipment for those who want to amplify low-range audio waves or signals into a high-range audio signal that can be heard through headphones or speakers. For first-time buyers, the specifications and various features of a simple or integrated audio amplifier can be confusing and therefore one must be sure of the much-needed and important specifications. Now that one can make an informed and clear decision as per their needs and requirements, listed below are certain features that you need to consider while purchasing one.
Total Harmonic Distortion
The total harmonic distortion and intermodulation distortion level of the audio amplifier should be checked before purchasing. An amplifier can give only any type of distortion. Having a THD means that unwanted signals will be output due to harmonics and IMD means that unwanted signals are present on the input and interference occurs on the output due to other things like diodes.
Production
The next important point is the power output of the amplifier, which means the amount of electrical power it can deliver to the output speakers without any damage. You must check the nominal power labeled, which will be the value of the continuous power that will be supplied without any type of damage or distortion.
Frequency
The frequency response is the relational response between the input and output level of the signals. Always check that the frequency response is within the audible band which is between 20 and 20,000 Hz for the best output quality.
Sensitivity
Amplifier sensitivity refers to the characteristic that establishes the minimum input signal needed to cause a maximum amplifier output signal level. Having a sensitivity that is too high or too low can cause a lot of distortion in the output signals. The lower the value, the higher the mentioned sensitivity of the amplifier.
Impedance
Impedance is important in finding the voltage match between the amplifier and sound source and different impedances can be found for different audio input sources. Amplifiers tend to have both output and input impedance, and one must look for a higher input impedance to get the proper voltage supply.
Gain
The next thing to check is the gain of the amplifier. It is a signal power source between the output and input power of the amplifier that is indicated in decibels.
signal to noise
In amplifiers, the higher signal to noise ratio will always improve the output quality. It represents the difference between the noise level and the output level of the amplifier and the sound level. It is the difference in magnitude that is specified in hertz. You should also find an amplifier that can amplify various types of audio sources and channels to prevent crosstalk.