First, how to wire the high-power audio amplifier board?
1. Make sure that the audio cable behind the amplifier and audio is intact. If not, you need to buy a part at the hardware store first. It won't take long. Otherwise, put it in the back.
2. The connection of audio cable is very simple. You can also find a vice or scissors. Usually, both ends of the audio wire are removed from the rubber layer on the surface. Except for copper wire, copper wire has two colors: brass. Color and silver.
3. Turn the copper wire several times by hand to make it hard, and then look at the red and black terminals on the back of the amplifier. The red pillar is brass and the black pillar is silver.
4. The other end of the audio cable is also connected to the back of the speaker. Some speakers are terminal, while others are more convenient. Press the button with your finger, push the wire in and then release it. The belt buckle has been firmly fixed.
5. For the two speakers, connect the wires to the left and right sides respectively, that is, the left and right sides.
6. After the audio is connected to the power amplifier, the audio source needs to be input to the power amplifier. Usually the audio source is a DVD player, and you can also use a laptop (if allowed), which is more flexible.
7. The two ends of the shower head should be connected by audio cables, and the L and R channels for outputting the down-inserted audio output signal behind the DVD should also be inserted into the L and R channels of the power amplifier. Then, the sound is output from DVD to amplifier, and then from amplifier to stereo.
Second, the performance of the amplifier
1. The unit output power is W. The name is different because different manufacturers have different measurement methods. For example, power amplifiers with rated output power, large output power, music output power and maximum music output power are also expensive.
2. Music power: refers to the instantaneous high output power of the amplifier music signal, provided that the output distortion does not exceed a specific value.
3. Peak power: refers to the larger music power that the amplifier can output when the volume of the amplifier is adjusted to a larger value without distortion.
4. Rated output power: the average output power with harmonic distortion of 10%. Also known as great strength. Generally, the peak power is greater than the music power, and the music power is greater than the rated power. Generally, the peak power is 5-8 times the rated power.
5. Frequency response: indicates the frequency range and non-uniformity of the power amplifier. The flatness of frequency response curve is usually in decibel db.
6. After the input signal is amplified, it is necessary to restore the distortion of the ideal power amplifier. However, due to various reasons, the signal amplified by the power amplifier is often compared with the input signal, resulting in different degrees of distortion.
The above is a detailed introduction to the wiring of high-power audio power amplifier board and the performance of power amplifier. In this small series, I feel that for some music lovers, some high-power speakers are still worth buying, but pay attention to the safety of electricity when connecting.