These are called "passive speakers." On the other hand, powered stereo speakers (also known as "powered monitors" or "active speakers") are designed with built-in amplification, so they don't require a receiver. Instead, you can connect powered speakers directly to a music source, such as a turntable or CD player.

Benefits of Active Speakers Active speakers provide an excellent solution with a low foot print in terms of area required. They often incorporate many features that a passive cannot, most important being the fact no amplifier is required.