When speakers are powered on without any audio input, they may produce a faint humming or buzzing sound. This sound is typically a result of the electrical current flowing through the speaker's components, such as the amplifier and drivers.
The humming or buzzing sound can be attributed to a few factors, including:
Electrical Interference: The speaker's electronics can pick up electromagnetic interference from other devices or power sources in the vicinity. This interference can manifest as an audible hum or buzz.
Amplifier Noise: The internal amplifier of the speaker can introduce some noise into the system. This noise can be amplified and result in a faint sound even without an audio input.
Ambient Noise: In a quiet environment, you may notice the inherent noise produced by the speaker components. This noise is typically minimal and may not be noticeable in a normal listening environment.
It's important to note that the specific sound produced by speakers can vary depending on their design, quality, and the surrounding environment.