What Is Class D Digital Power Amplifier?

Ascsonic Audio manufacture different type power amplifier, specially, the class d power amplifier is the flagship in Ascsonic Audio amplifier categories.

First, what is class D amplifier?

CLASS-D, that is, class D amplifier is also called digital amplifier. The core features of digital amplifier:

① music signal cannot be directly amplified, need to be converted to a switching signal;

② amplifier working in the switching state, the power tube is a field effect tube;

③ amplifier output has a coil, capacitors composed of low-pass filter.

The main advantage of digital amplifiers over analog amplifiers is: high efficiency.

The benefits of high efficiency:

1. amplifier can be made very small, very lightweight;

2. power can be made very large;

3. power saving, energy saving and environmental protection.

Second, the basic principle of class audio digital amplifier

1. Error correction: used to eliminate the distortion generated by the amplifier. The method is to sample the signal output from the amplifier and compare it with the input signal to eliminate the distortion generated by the amplifier with negative feedback.

2. Pulse Modulation: Transforms the music signal into a switching control signal, which is used to control the switching bridge.

3. Switching bridge: it is the power amplification part of digital amplifier. The power tubes are field effect tubes, which work in the switching state, so they can obtain more than 90% efficiency.

4.  Low-pass filter: converts the power pulse signal into music signal. The switching bridge outputs a high power pulse signal, which cannot be sent directly to the speakers.

5.  Switching mode power supply: supply power to each part of the amplifier circuit. Compared with the ring bull power supply of analog amplifier, the advantages of switching power supply are mainly: light weight and can stabilize the voltage.

Third, the advantages of digital audio amplifier

The core advantage of digital amplifier is high efficiency, the comprehensive use of efficiency can reach more than 80%, much higher than other amplifiers. The benefits of high efficiency: ① amplifier heat small, low device operating temperature, life and reliability will be significantly improved;

② volume and weight are much smaller than the analog amplifier;

③ volume, weight of the substantial reduction in transportation, installation costs can be saved, reduce the handling, installation difficulties;

④ save power, reduce operating costs.

Yolo Audio manufacture 4 channel D18K4 digital class d audio power amplifier and 2 channel D24K2 class d digital subwoofer power amplifier perfect for professional audio sound system.