drive-by-wire speaker, speaker 1.Power:15W 2.USB/ ... reader 3.3"x2+4" Speaker, Mini Speaker, 2.1 Computer Speaker, Audio, Home Theater Speaker, Home Speaker, Subwoofer, MP3 ... Output. Magnetically ShieldedMagnetically Shielded Sub-woofer Driver. 4" Sub-woofer Drive UnitBig Speaker, Big Base. This Speaker system has 4 Inch ... no best only better, so our products are more competitive. drive-by-wire speaker