What is a Class A amp? Advantages, disadvantages and uses of Amply Class A

If you’ve ever heard of Class D Amply, you’re probably not familiar with Class A amps. However, few people understand the true meaning of this type of device. So what is a Class A amp? What are the advantages, disadvantages and uses of Class A amp? Let’s find out with Tnhelearning.edu.vn in the following article!

What is Amplifier Class? Class parameters you should know

Amply Class are the specifications of an Amp. Each amplifier line uses Class to distinguish different parameter characteristics.

Based on the representation of the sine chart, Class is the representation of the number of output analog signals that change in the amplifier circuit.

In simple terms, Class is the ratio of input and output power . Therefore, the Class assumes an important function in the audio equipment, and the quality of the Amplifier is also evaluated based on the symbol of each Class.

The parameters in the Class you should know:

• Power: Includes active power and peak power.
• Power gain: Also known as sensitivity, it is responsible for amplifying the sound of the amplifier, the unit is dB.
• Frequency response: The frequency range at which the amplifier can amplify the audio signal to satisfy the listener. Usually, the amps will have a frequency of oscillation between 20Hz – 20KHz .
• Audio performance: Emits audio power according to the input power, there is a difference between the output and input power of the amplifier.
• THD: After being decomposed and reproduced in the amplifier, this parameter assumes the role of comparing the sum of the frequencies between the signal and the output. If the THD parameter is low, the fast sound is very nice and true. Normally THD should be less than 0.5% .
• Impedance: There is a function to announce the harmony between the speaker and the Amply, because when connecting the speaker to the amplifier, the impedance of both must be similar.

Types of Amply Class on the market today:

• Class A: For high quality, good sound and no distortion, thanks to the operation of the transistor. However, this type of Class consumes a lot of energy, the transistors are prone to heat, and the efficiency is low, so an abundant power supply is required.
• Class B: The highlight of this type is that it doesn’t get hot quickly because it works on the push-pull principle. The big downside is that the sound quality is degraded as the performance goes up. If operating in low signal then the sound is prone to cross distortion. Therefore, you must not use low-power speakers.
• Class AB: This is a harmonious connection between A and B, so it has both good sound quality and a powerful performance of about 60%.
• Class C: A class with high efficiency, up to 80%. Therefore, this type is not used for specialized audio for watching movies, listening to music, but only in radio systems.
• Class D: Commonly used in mobile devices, because of its extremely low power consumption. It also contributes to the longevity of the device.
• Class G: Uses 2-way power supply to operate. If the signal changes, the Class will automatically select the appropriate voltage supply, so it is also universally applicable to mobile devices.
• Class DG: Using dual power sources to operate, detecting the magnitude of the signal should be widely applied to current amps.
• Class H: Voltage regulation to minimize power drop on the output port, using discrete power supply to provide an infinite voltage source for Amply.

What is a Class A amp? Uses of Amply Class A

Class A amplifier is an audio device with low operating efficiency, only about 25% . The device works on the principle of semiconductor , that is, when the signal is transmitted to the device, the active semiconductor components will amplify at the positive and negative terminals.

Amply Class A operates with strong capacity, so it brings extremely impressive uses to users. Class A helps amplify sound at the highest standard of quality and fidelity . At the same time, it amplifies the sound for near absolute accuracy due to running entirely in the linear cascade.

Working principle of Amply Class A

Class A amplifier is composed of 6 parts with specific operational tasks as follows:

• Power block: Responsible for the production and maintenance of electronic components in the circuit. At the same time, the Amply source block has the function of converting power sources to rated voltage, produced for different blocks of Amply.
• Display and communication block: Located in front of the Amply, includes LED volume display, which helps to show the status of the Amply such as volume level, power status, trim, overtransport,…
• Power block and protection: Responsible for determining sound quality and protecting Amplity to operate sustainably.
• Input circuit block: Plays the role of selecting the input signal from different sources, helping to amplify and process the necessary signal so that when it is sent to the timbre processing circuit, the input signal level of the sources is not too different. on amplitude.
• The circuitry processes tones and creates effects: The user can raise or lower them as much as they like, thanks to band selection with individually adjustable gain.
• Processing Circuit Blocks: May or may not be in Class A Amps. They have a microphone input, impedance harmonized support, and a mixer circuit for mixing signals from other inputs.

Pros and cons of Class A amps

To help users have a detailed assessment and choose to buy the right product, let’s immediately find out the advantages and disadvantages of Class A Amply as follows:

Advantages of Class A Amply:

• No nonlinear domain: The device only uses a single operating shell, so during operation they will not create a nonlinear domain or radial distortion.
• Sound quality: Good and highly realistic, relatively sweet and without distortion.
• Using Class A can have some errors: However, the user only needs to maintain the voltage level of the DC clamshell at a stable level. At that time, the error situation will be significantly reduced, making the sound quality more realistic. To do this you need to use a powerful power supply and a good quality filter.

Disadvantages of Class A Amply:

• Uses a lot of electricity to generate heat for capacity, so it will waste a large amount of electricity.
• The power clamshell doesn’t turn off even when there’s no electricity going through, because the device relies on a single clamshell that connects to multiple systems.

Some models of karaoke systems, amps are doing business at Tnhelearning.edu.vn, please refer to:

Hope the above article will help you understand more about what is Class A Amply? Advantages, disadvantages and uses of Amply Class A to make the right choice. Any questions please leave a comment below!