21W x 2 SNR: ?85dBA INPUT SENSITIVITY: 750mV  50mV DISTORTION: ?0.05% SUBWOOFER / BASS UNIT: 4 inch (106mm), 6? TWEETER UNIT: ?13mm silk domed tweeter, 4? WEIGHT: 4.9Kg Net | 5.65Kg Gross DIMENSION: 146mm x 234mm x 196mm (WxHxD)