Power and compatibility oriented amplifier description Power supply: The amplifier operates from a 12V power supply, suitable for use with standard 12V sources. Front panel controls: Power switch, bass adjustment, volume adjustment, and treble adjustment allow ondevice sound shaping to suit different media and listening spaces. Power plug: Uses a 55X2.1 mm power plug. Product matching: A pair of 26 inch passive speakers are recommended to pair with this amplifier. Connectivity: Supports connection to mobile phones, computers, MP3 players, and set boxes. Key benefits: Enables amplification for passive speakers with a simple 12V power setup. Quick sound tuning through bass and treble adjustments, plus overall volume control. Clear compatibility with common devices for versatile multimedia playback. Practical use scenarios: Desktop computer or laptop audio enhancement: connect a phone, MP3 player, or computer to improve music and video sound with adjustable bass and treble. Home multimedia system: pair with 26 inch passive speakers to create a compact stereo setup for movies, music, or presentations. Small venue or classroom amplification: use with a set box or MP3 player to deliver clearer audio for presentations or small events.