At a rock concert, a dB meter registered 130 dB when placed 2.5 m in front of a loudspeaker on the stage. What was the power output of the speaker, assuming uniform spherical spreading of the sound and neglecting absorption in the air? (The intensity of the reference level required to determine the sound level is I0 = 1.0×10−12 W/m2).
Group of answer choices
1100 W
18 W
790 W
63 W
650 W