The amplifier is the heart and soul of an audio system. The amplifier uses a small voltage (electromotive force). It then feeds it into a transistor or vacuum tube, which acts like a switch and turns on / off at high speed depending on the amplified voltage from its power supply. When the power supply of the amplifier is supplied, the power enters (the input signal) through the input connector and is amplified to a higher voltage level. This means that the low-power signal from the front amplifier is raised to a level sufficient for the speaker or headphones to reproduce sound, allowing us to listen to the music with our ears.

4 Channels big power amplifier for Indoor or outdoor show

Principle of Power Amplifier

The sound source plays a variety of sound signals to amplify the sound box.

Like a Class D Magnum

Class-D power amplifier is an amplification mode in which the amplifier element is in the switching state.

No signal input: amplifier in the cut-off state, no power consumption.

There is a signal input: The input signal makes the transistor enter the saturation state, the transistor turn on the switch, the power supply and the load are directly connected.

Class D Power amplifier for professional speaker

Key points of selection and purchase

1.The first is to see if the interface is complete

The most basic input and output interface that an AV power amplifier should include the following: coaxial, optical fiber, RCA multi-channel input interface for input digital or analog audio signal; horn output interface for output signal to audio.

2.The second is to see if the surround sound format is complete.

The popular surround sound formats are DD and DTS, both of which are 5.1 channels. Now these two formats have developed to DD EX and DTS ES, both of which are 6.1channel.

3.See if all channel power can be adjusted separately

Some cheap amplifiers divide the two channels into five channels. If the channel is large, it will be large and small, and the truly qualified AV amplifier can be adjusted separately.

4.look at the weight of the amplifier.

Generally speaking, we should try our best to choose a heavier type of machine, the reason is that the heavier equipment first power supply part is stronger, most of the weight of the power amplifier comes from the power supply and chassis, the equipment is heavier, which means that the transformer value used by him is larger, or the capacitance with larger capacity is used, which is a way to improve the quality of the amplifier. Secondly, the chassis is heavy, the material and weight of the chassis have a certain degree of impact on the sound. The chassis made of some materials is helpful to the isolation of radio waves from the circuit in the chassis and the outside world. The weight of the chassis is higher or the structure is more stable, and it can also avoid the unnecessary vibration of the equipment and affect the sound. Third, the more heavy power amplifier, the material is usually more rich and solid.