SMSL SA50 50Wx2 TDA7492 Class D Amplifier + Power Adapter (Black) Simple design and compact appearance, black color match makes it stable and not boring. Real 2X50W stereo circuit design, strong output short circuit protection and thermal overload protection. Parallel 6600 UF fever philips filter capacitance, meet the needs of the high power peaks. Acoustic quality stereo sound, bring you noble hearing and make you immersive. (Please note:this amp cannot work with subwoofer) Holiday gift, home gift, a perfect gift for your family, lovers or friends. Small size ideal for placing on the table, especially for home, office, and school.