The ACS41 is an amplified speaker system designed especially for Multimedia Computer near field monitoring. A unique feature of the amplifier is a patented dynamic control circuit that automatically boosts bass at low volume to maintain musical "realism" and a second bass boost circuit that enhances bass response at all times. The speaker enclosures are ported for maximum low frequency response and are magnetically shielded to prevent color distortion on video displays. When the ACS41 is not used with a multimedia computer, it can serve as an amplified speaker system for CD players, MP3 players, and various video and audio sources with excellent results.