Sencor SSB 4450BS

Active speakers have a custom built-in amplifier (typically a PC speakers). Conversely, passive systems require an external amplifier, from which the sound goes to each speaker.

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.

The maximum long-term power, often referred to as RMS, AES or nominal power, represents the highest power a loudspeaker can handle over the long term without risk of damage. Higher RMS amplifier power is acceptable, providing a margin for dynamic peaks. When distortion occurs, the volume should be reduced.

In terms of frequency range, speakers are produced with different properties. It is due to both, its purpose and secondly, the physical properties of individual structures. It is the lowest value in...

The number of bands refers to the number of frequency bands that the loudspeaker or system reproduces. A single-band loudspeaker produces all the sounds from a single transducer, while a multi-band loudspeaker has multiple transducers, each optimised for a specific frequency range (e.g. high, mid, low frequencies). Multiband systems often provide better sound quality because each band can be reproduced by a transducer designed specifically for that frequency range.

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.