This could be due to no input signal connection, the amplifier not being turned on properly, or the fuse of the amplifier being blown. Additionally, there might be issues with the speaker connections.

The power of the amplifier affects the volume output, but it does not entirely determine sound quality. A higher-power amplifier can drive larger speakers to produce louder sound, but the quality of sound is more influenced by the amplifier's design and quality.

The amplifier may overheat due to poor ventilation or using it in a confined space. Make sure there is enough ventilation around the amplifier or ensure that the heatsink and fans are functioning properly. Avoid continuous high-temperature operation, and periodically check and clean the amplifier.

Distortion can occur if the input signal is too strong, the amplifier settings are incorrect, or the speaker load exceeds the amplifier's capacity. Check the input volume and adjust the settings, and ensure proper matching between the amplifier and the speakers.

When choosing amplifier power, it’s important to consider the rated power of the speaker and the environment. Generally, the amplifier power should be 1.5 to 2 times greater than the rated power of the speaker to avoid insufficient power or damage to the speaker.

Yes, audio amplifiers need regular maintenance, including cleaning the heat vents, checking the power cables, and ensuring that plugs and sockets are not loose or clogged with dust. Regularly inspect the amplifier both inside and out to extend its lifespan.

If the amplifier and speakers are mismatched, it can lead to poor sound quality, distortion, and even equipment damage. When selecting an amplifier, consider the impedance and power rating of the speakers to ensure proper compatibility for optimal sound quality.

Check if the power outlet is stable, and avoid sharing power sources with other electrical devices to reduce interference. Use high-quality cables and ensure all connections are tight to minimize noise.

Hissing sounds can be caused by grounding issues, signal interference, or loose connections in the audio cables. Check the cables between the amplifier and speakers to ensure they are securely connected, and keep signal and power cables separated. Also, ensure proper grounding for all devices.

A decrease in volume after prolonged use may be caused by overheating or overloading, triggering the amplifier’s protection mode. Check if the amplifier has thermal protection and ensure sufficient cooling space. If the issue persists, the amplifier’s internal circuits may need repair or component replacement.