Audio amps are the soul of every home theatre system. With the increase in quality and output power of speakers today, the demands of audio amplifiers have gone up as well. Nowadays, it has become extremely hard to choose your perfect amplifier because of the large number of options available. In simple words, the job of an amplifier is to convert an audio signal having low power into one that has high power.
Commonly available audio amplifiers include tube amps, linear amps, class-AB, class-D and class-T amps. To help you choose the best amongst them, let’s know more about each of these types of amps.
1. Tube Amps – Tube amplifiers were used commonly earlier. A tube controls the current flow with the help of a control voltage that’s connected with the tube. Tube amplifiers, however, have high amount of distortion. Regardless of it, these amps induce higher harmonics in the signal which makes them popular. People describe the sound of tube amps as warm when compared to that of solid state amps.
2. Class-A Amps – Tube amps have been replaced by solid state amps that have semiconductor elements which are bipolar transistors or FETs. Earliest type of solid-state amp was class-A amps where the transistor controlled the current flow. Some other amps made use of a feedback mechanism so as to minimize harmonic distortion. Class-A amps not only have low levels of distortion but also have the lowest level of noise. Their main drawback is that they are less efficient and are quite bulky.
3. Class-AB Amps – Class-AB amps are an improvement over class-A amps. They make use of a series of transistors so as to break the large-level signals into two distinct areas each of which can then be amplified efficiently. Class-AB amps are generally smaller than class-A amps, however, this difference in topology adds-on to the distortion of the sound in that region where signal switches itself between those areas.
4. Class-D Amps – These amps have further improved the efficiency of class-AB amps by making use of a switching transistor that’s constantly being switched on and off. This switching stage dissipates negligible power thereby increasing the power efficiency of class-D amps. The amp’s switching transistor is controlled by pulse-width modulator and due to non-linearities, class-D amps have the highest distortion.
5. Class-T Amps – In order to solve the high audio distortion problem, the amplified signal is then compared with original low-level signal so as to correct any errors. A well-known architecture that makes use of this type of technology is class-T amps. They achieve audio distortion of class-A amps while offering the power efficiency of class-D amps. Thus class-T amps can be manufactured in extremely small size and can still easily high quality audio and audio fidelity.
Amplifiers can greatly help when it’s about revving-up the audio quality. All one needs to do is choose the perfect amplifier for him/her self. We, at Dial TV, are Winnipeg’s leading TV and stereo repair company. Reach out to us anytime to get your LED TV and other media appliance repaired.