"Unit of electrical power required to do work at the rate of one joule per second. One watt of power is expended when one ampere of direct current flows through a resistance of one ohm. The power capability of amplifiers and loudspeakers is given in watts, which relate to both the voltage driving the system and current handling capabilities of the devices."robina_80 said:hi everyone if i got a speaker system with a subwoofer what one would be better bass a subwoofer with 150watts or 20 watts i know the powers different but what would have better bass sound