RH-AUDIO
Focus Us On
DOWNLOAD

Classification of Commercial Power Amplifier

In accordance with the different amplifier tube conductive modes, there are different types about the commercial power amplifier: the first-class amplifier (also known as class A), the second-class amplifier (also known as class B), the first-second-class amplifier (also known as class AB) and the fourth-class amplifier (also known as class D).

The first-class amplifier refers to the commercial power amplifier of which any power output element will not be cut-off current (namely stop output) during entire signal cycle (plus or minus two and a half cycles of the sine wave). When the first-class amplifier is operating, it will produce high heat with low efficiency. However, its inherent advantage is that there is no crossover distortion. The mono-amplifier is the first-class amplifier while the push-pull amplifier can be the first class, or the second class or the first-second class.


The second-class amplifier refers to the amplifier of which the plus or minus two and a half cycles of sine signal are outputted and amplified respectively and alternately by two "arms" of the push-pull output stage. And the conductive time of each "arm" is half a cycle of the signals. The advantage of the second-class amplifier is that it has high efficiency and its disadvantage is that it will produce crossover distortion.

The first-second-class amplifier is between the first class and the second class. And the conduction time for each "arm" of push-pull amplification is more than half a period of signal and less than one cycle. The first-second-class amplifier can effectively solve the crossover distortion problem of the second-class amplifier, and it is more efficient than the first-class amplifier, so it has been widely used.

The fourth-class amplifier is also known as the digital amplifier, which can amplify the audio signal by the extremely high-frequency conversion switch circuit. The amplifier features high efficiency and small volume. There are many fourth-class amplifiers of which power are more than 1,000W but they are just as big as VHS tapes. This type of amplifier is not suitable for use as the broadband amplifier, but there are more applications in active subwoofer.

Commercial Power Amplifier
Related News
  • Classification about the PA (Public-Address) System

    Classification about the PA (Public-Address) System

    June 22, 2018Whether you are operating performance area or building a mobile platform, you always need an excellent PA system which not only can meet your requirements at present, but also can meet your requiremen...view
  • Why Choose The Class D Amplifier

    Why Choose The Class D Amplifier

    May 29, 2018Class D Amplifier is the amplifier which drives the speaker by ON/OFF switch in the control switch unit. The class D amplifier was first proposed in 1958 and it has become more and more popular in rec...view
  • The Working Principle of PA Speaker

    The Working Principle of PA Speaker

    June 22, 2018By the current control action of triode or the voltage control action of field effect tube, PA can convert the power of the power supply to the current which varies according to the input signal. Beca...view
  • Features of the High-end Pre AMP Amplifier

    Features of the High-end Pre AMP Amplifier

    June 22, 2018Feature 1: the filter plays an important role in denoising and sound-quality restorationTwo fairly rare but useful analog filters are built into the MP1100. One is called Rumble Filter which is mainly...view
  • Technical Characteristics of HIFI PA System Integrated Amplifier

    Technical Characteristics of HIFI PA System Integrated Amplifier

    May 15, 2018HIFI PA is slightly different from AV PA. HIFI often has the following characteristics:1. 2.0 sound track stereo. Most HIFI PA only has two channel outputs, and is different from AV PA surround sound ...view
  • Television Signal Multi Zone Mixer

    Television Signal Multi Zone Mixer

    June 22, 2018Television signal mixer is a device that combines more than two sets of radio-frequency signals with different frequencies together to form one-way broadband radio-frequency signal and output multi-ch...view
chat
  • TEL:+86-20-39388220
  • FAX:+86 20 31072811
  • EMAIL:info@rh-audio.net
  • ADDRESS:Floor 6, Building J, Kaida Industrial Park, Shixin Road, Xinshuikeng Village, Panyu District, Guangzhou China.