Each solid speaker cabinet houses a 1 soft dome tweeter and a 5.5 inch woofer for detailed, full-range sound. The active left speaker has four different inputs and a subwoofer pre-out, and different sound sources can be connected simultaneously by either optical, RCA or 3.5mm inputs. A USB port can be used to charge smart phones or tablets, or connect the optional Jamo WK 200 wireless kit to wirelessly stream audio from a selected source.SPECIFICATIONSSystem Type 2.0 Active Bass Reflex (Left Active + Right Passive)Frequency Response 50Hz-20,000Hz +/-3dBRated Output (Watts) 2x30 (@ 4 ohms,1% THD)Weight (Kg/lb) Left: 5.1/11.24, Right: 3.6/7.93Outputs Sub out, Right spk.out (Active)Tweeter (mm/in) 25/1Woofer (mm/in) 140/5.5Inputs Optical(2), L/R RCA analog, 3.5mm analog (Active)Standby Power (Watts)