TCL P733W

The number of channels refers to the number of independent audio signals that can be reproduced simultaneously. An example might be 2-channel stereo sound, where each channel represents one ear (left and right), or 5.1 channel surround sound, which has five full channels (front left, center, front right, rear left, rear right) and one channel for the subwoofer.

It is defined as the amount of energy per unit of time and is expressed in watts.

Subwoofers are speakers designed to reproduce low frequencies, usually referred to as bass. There are two basic types of subwoofers: active and passive. Active subwoofers have their own amplifier integrated directly into the unit, while passive subwoofers require an external amplifier for power. Active subwoofers are often considered more user-friendly because they do not require additional equipment to function, while passive subwoofers can provide a higher level of control over the sound.