What is subsonic on amp?

Subsonic is a feature found on some amplifiers that filters out low-frequency sound waves below the audible range of human hearing. These low-frequency waves, referred to as subsonic frequencies, can cause distortion and damage to speakers and other audio equipment.

By filtering out these frequencies, the amplifier can improve the clarity and accuracy of the audio signal before it reaches the speakers, resulting in a cleaner and more balanced sound. Additionally, subsonic filtering can help reduce the strain on the amplifier's power supply, which can prolong the lifespan of the equipment.

Subsonic filtering is especially useful for music genres that feature heavy bass, such as rap or electronic dance music, as it can prevent distortion and unwanted noise caused by the low-frequency vibrations. It is important to note, however, that subsonic filtering should only be used when necessary, as excessive filtering can potentially remove desirable low-frequency harmonics from the music.