One channel of my amplifier was heavily distorted in one channel, and the sound was not clear

If it's just a channel, it's likely to be a problem with the speaker, you can first see if the wiring of the speaker is normal, if the wiring is good, try to switch the two speakers, and you can judge whether it's a horn problem.

Check whether the parts of the audio signal cable (usually the lotus plug cable) are in good contact and not plugged in. Or it is caused by rust and oxidation on the terminal for a long time.

2. The volume adjustment potentiometer on the power amplifier takes a long time because the loss of carbon film will lead to abnormal noise during adjustment, or some poor contact (component aging, pad soldering, etc.), which will also lead to this.

3. Take a mono signal input, disconnect the load and test the output waveform with an oscilloscope, compare the left and right channels, if the test waveform is inconsistent (it should be roughly the same), then the line fault can be determined.

The low-impedance power amplifier has at least two channel outputs, and it is obvious that there are many reasons for serious distortion;

1. Eliminate speaker problems; Swap the left and right speaker wires to see if it's a speaker problem;

2. Eliminate input signal problems; Switch the left and right channels of the input signal to see if it is a problem with the sound source;

3. If there is no problem with the speaker and the sound source, it is the problem of the amplifier itself, find an insider to repair it.

When the volume is turned up too much, noise can also occur. This situation is caused by the fact that the output power of the power amplifier may be small, and it cannot avoid the large dynamic peak signal at the moment, or because of the overload distortion of the horn.

The power amplifier is referred to as the power amplifier, commonly known as the "amplifier", is the most basic equipment in the audio system, and its task is to amplify the weak electrical signals from the signal source (or from the mixer in the professional audio system) to drive the speaker to produce sound.

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If the cause of the horn is ruled out, the faulty channel can be checked along the line to see if the capacitance of the faulty channel and the pin voltage associated with the amplifier manifold and the external circuit components are normal. And check whether the two power amplifier tubes are faulty (whether the resistance and voltage and midpoint voltage are normal).

Power amplifier is referred to as power amplifier, generally refers to the most basic equipment in the audio system, commonly known as "amplifier", its task is to amplify the weak electrical signal from the signal source (or from the mixer in the professional audio system) to drive the speaker to produce sound. It can also refer to other devices that perform power amplification.

The function of the power amplifier is to amplify the weak signal from the sound source or preamplifier and push the speaker to play sound. A good sound system amplifier plays a big role.

Power amplifier is the largest family of all kinds of audio equipment, and its function is mainly to amplify the weaker signal input from the audio source equipment, and generate a large enough current to push the speaker to play back the sound. Due to the consideration of power, impedance, distortion, dynamics, as well as different ranges of use and control adjustment functions, different amplifiers have different internal signal processing, circuit design, and production processes.

Performance metrics. The main performance indicators of the power amplifier are output power, frequency response, distortion, signal-to-noise ratio, output impedance, damping coefficient, etc.

Output power. Output power: The unit is W, because the measurement methods of each manufacturer are different, so there are some different names. For example, rated output power, maximum output power, **output power, peak output power.

**Power. Power: refers to the instantaneous maximum output power of the power amplifier to the ** signal under the condition that the output distortion does not exceed the specified value.

Peak power. Peak power: refers to the maximum power that can be output by the amplifier when the volume is adjusted to the maximum under the condition of no distortion.

Rated output power.

Rated output power: The average output power when the harmonic distortion is 10%. Also known as maximum useful power. Generally speaking, the peak power is greater than the first power, the first power is greater than the rated power, and the peak power is generally 5-8 times the rated power.

One of the channels of the amplifier is severely distorted, indicating that the channel is malfunctioning. With the help of the substitution method of connecting the first half of the good channel to the second half of the doubtful channel, the scope of the fault can be narrowed and the serious distortion can be further repaired.

After the speaker is eliminated, it is the channel capacitance that is bad or the front and rear amplifiers are mismatched.

The differential circuit or op amp part is faulty.

The sound of the amplifier is very small, and the root cause of the problem can be investigated by this elimination

1) Because the amplifier has multiple outputs, you see if each channel is the same very quiet.

2) Swap the speakers of the power amplifier output with each other to see if there will be any changes.

3) Because each channel inside the amplifier works independently, the shunt elimination method can quickly determine whether the fault belongs to the pre-amp or the post-amp.

5. If it is confirmed that it is a power amplifier problem, it will be sent to a professional maintenance shop.